This invention generally relates to golf clubs, and more specifically to golf clubs having an improved connection between the shaft and club head that provides interchangeability and adjustability.
In order to improve their game, golfers often customize their equipment to fit their particular swing. In the absence of a convenient way to make shafts and club heads interchangeable, a store or a business offering custom fitting must either have a large number of clubs with specific characteristics, or must change a particular club using a complicated disassembly and reassembly process. If, for example, a golfer wants to try a golf club shaft with different flex characteristics, or use a club head with a different mass, center of gravity, or moment of inertia, in the past it has not been practical to make such changes. Golf equipment manufacturers have been increasing the variety of clubs available to golfers. For example, a particular model of golf club may be offered in several different loft angles and lie angles to suit a particular golfer's needs. In addition, golfers can choose shafts, whether metal or graphite, and adjust the length of the shaft to suit their swing. Recently, golf clubs have emerged that allow shaft and club head components, such as adjustable weights, to be interchanged to facilitate this customization process.
One example is U.S. Pat. No. 3,524,646 to Wheeler for a Golf Club Assembly. The Wheeler patent discloses a putter having a grip and a putter head, both of which are detachable from a shaft. Fastening members, provided on the upper and lower ends of the shaft, have internal threads, which engage the external threads provided on both the lower end of the grip and the upper end of the putter head shank to secure these components to the shaft. The lower portion of the shaft further includes a flange that contacts the upper end of the putter head shank when the putter head is coupled to the shaft. This design produces an unaesthetic bulge at the top of the shaft and another unaesthetic bulge at the bottom of the shaft.
Another example is U.S. Pat. No. 4,852,782 to Wu et al. for Equipment for Playing Golf. The Wu patent discloses a set of equipment for playing golf that includes a length adjustable shaft and a plurality of club heads that are designed for easy assembly and disassembly. A connecting rod is inserted into an end of the shaft and a pin retains the connecting rod within the shaft. A locking portion of the connecting rod is configured to extend into the neck of a club head and through a slot in the neck. After the locking portion is extended through the slot, the connecting rod is rotated relative to the club head so that the components are locked together. The neck also includes sloping end surfaces that are configured to guide the ends of the pin to adjacent stop surfaces during the relative rotation between the connecting rod and the club head.
Another example is U.S. Pat. No. 4,943,059 to Morell for a Golf Club Having Removable Head. The Morell patent discloses a putter golf club including a releasable golf club head and an elongated golf club shaft. The club head hosel has a plug containing a threaded axial bore. A threaded rod is retained on the connector portion of the shaft and is threaded into the axial bore of the plug of the club head for operatively connecting the shaft to the head.
Another example is U.S. Pat. No. 5,433,442 to Walker for Golf Clubs with Quick Release Heads. The Walker patent discloses a golf club in which the club head is secured to the shaft by a coupling rod and a quick release pin. The upper end of the coupling rod has external threads that engage the internal threads formed in the lower portion of the shaft. The lower end of the coupling rod, which is inserted into the hosel of the club head, has diametric apertures that align with diametric apertures in the hosel to receive the quick release pin.
Another example is U.S. Pat. No. 5,722,901 to Barron et al. for a Releasable Fastening Structure for Trial Golf Club Shafts and Heads. The Barron patent discloses a bayonet-style releasable fastening structure for a golf club and shaft. The club head hosel has a fastening pin in its bore that extends diametrically. The head portion of the shaft has two opposing “U” or “J” shaped channels. The head end portion of shaft fastens on the hosel pin through axial and rotary motion. A spring in the hosel maintains this fastenable interconnection, but allows manually generated, axially inward hosel motion for quick assembly and disassembly.
Another example is U.S. Pat. No. 5,951,411 to Wood et al. for a Hosel Coupling Assembly and Method of Using Same. The Wood patent discloses a golf club including a club head, an interchangeable shaft, and a hosel with an anti-rotation device. The hosel contains an alignment member with an angular surface that is fixed, by a stud, within the hosel bore. A sleeve secured on the shaft end forms another alignment arrangement element and is adapted to engage the alignment element disposed in the hosel bore. A capture mechanism disposed on the shaft engages the hosel to releasably fix the shaft relative to the club head.
Still another example is U.S. Pat. No. 6,547,673 to Roark for an Interchangeable Golf Club Head and Adjustable Handle System. The Roark patent discloses a golf club with a quick release for detaching a club head from a shaft. The quick release is a two-piece connector including a lower connector, which is secured to the hosel of the club head, and an upper connector, which is secured to the lower portion of the shaft. The upper connector has a pin and a ball catch that both protrude radially outward from the lower end of the upper connector. The upper end of the lower connector has a corresponding slot formed therein for receiving the upper connector pin, and a separate hole for receiving the ball catch. When the shaft is coupled to the club head, the lower connector hole retains the ball catch to secure the shaft to the club head.
Another example is U.S. Pat. No. 7,083,529 to Cackett et al. for a Golf Club with Interchangeable Head-Shaft Connections. The Cackett patent discloses a golf club that uses a sleeve/tube arrangement instead of a traditional hosel to connect the interchangeable shaft to the club head in an effort to reduce material weight and provide for quick installation. A mechanical fastener (screw) entering the club head through the sole plate is used to secure the shaft to the club head.
Another example is U.S. Pat. App. Publ. No. 2001/0007835 A1 to Baron for a Modular Golf Club System and Method. The Baron publication discloses a modular golf club including club head, hosel, and shaft. A hosel is attached to a shaft and rotation is prevented by complementary interacting surfaces, adhesive bonding or mechanical fit. The club head and shaft are removably joined together by a collet-type connection.
Other published patent documents, such as U.S. Pat. Nos. 7,300,359; 7,344,449; and 7,427,239 and U.S. Pat. App. Publ. No. 2006/0287125, disclose interchangeable shafts and club heads with anti-rotation devices located therebetween.
In some examples, the structure that allows the shaft and club head to be interchanged also provides an ability to adjust the characteristics of the golf club. An example is U.S. Pat. No. 4,948,132 to Wharton for a Golf Club. The Wharton patent describes a golf club that is assembled from a club head and a shaft assembly. The shaft assembly includes a lower end portion that defines an axis that is inclined with respect to a shaft. The lower end portion of the shaft assembly includes a cylindrical outer surface with fluting or spines that engage surface discontinuities in a hosel bore of the club head so that the shaft assembly may be located in different configurations relative to the club head.
Another example is U.S. Pat. No. 4,854,582 to Yamada for a Head Connecting Device in Golf Clubs. The Yamada patent discloses a golf club head that includes a shaft connected to the club head through a setting part, which is a sleeve having an inclined shaft bore. The patent describes how the setting part may be rotated to change the direction of the bore and the shaft so the direction of the head against the shaft varies.
Each of the Wharton and Yamada examples provide limited adjustability. In particular, each provides loft and lie orientations that form a perimetric formation that does not provide any interior positions within the perimeter.
There remains a need in the art for golf clubs with an improved connection that provides a more secure fit with improved adjustability and that is easier to manufacture.
The invention is directed to an interchangeable shaft system for a golf club. The inventive system provides interchangeability between a shaft and a club head that imparts minimal additional components and manufacturing difficulty. Several embodiments of the present invention are described below.
In an embodiment, a golf club comprises a golf club head, an elongate shaft, a shaft sleeve and a fastener. The golf club head includes a golf club head body and a hosel tube. The hosel tube is coupled to the golf club head body and defines a hosel bore and a plurality of hosel alignment features. The hosel alignment features are disposed in a proximal portion of the hosel tube. The shaft sleeve is coupled to a distal end portion of the shaft and includes a plurality of sleeve alignment features. The fastener releasably couples the shaft sleeve to the club head at least partially within the hosel bore. The hosel tube is constructed from a first material having a first density and the golf club head body is constructed from a second material having a second density that is different than the first density, and the hosel tube is coupled to the club head body adjacent a crown and adjacent a sole of the club head body.
In another embodiment, a golf club comprises a golf club head, an elongate shaft, a shaft sleeve and a fastener. The golf club head includes a hosel that defines a hosel bore. The shaft sleeve is coupled to a distal end portion of the shaft, and a distal portion of the shaft sleeve is received in the hosel bore. The shaft sleeve includes a sleeve body, a shaft adapter that is rotatably coupled to the sleeve body, and a locking member that locks the orientation of the shaft adapter relative to the sleeve body. The fastener couples the sleeve body to the club head at least partially within the hosel bore.
In the accompanying drawings, which form a part of the specification and are to be read in conjunction therewith and in which like reference numerals are used to indicate like parts in the various views:
The present invention is directed to an interchangeable shaft system for connecting the shaft of a golf club to a club head. Such a system can be utilized to provide customized fitting of various shaft types to a club head and/or to provide adjustability between a shaft and a club head. Several embodiments of the present invention are described below.
Unless otherwise expressly specified, all of the numerical ranges, amounts, values and percentages such as those for amounts of materials, moments of inertias, center of gravity locations, loft and draft angles, and others in the following portion of the specification may be reads as if prefaced by the word “about” even though the term “about” may not expressly appear with the value, amount, or range. Accordingly, unless indicated to the contrary, the numerical parameters set forth in the following specification and attached claims are approximations that may vary depending upon the desired properties sought to be obtained by the present invention. At the very least, and not as an attempt to limit the application of the doctrine of equivalents to the scope of the claims, each numerical parameter should at least be construed in light of the number of reported significant digits and by applying ordinary rounding techniques.
Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as possible. Any numerical value, however, inherently contains certain errors necessarily resulting from the standard deviation found in their respective testing measurements. Furthermore, when numerical ranges of varying scope are set forth herein, it is contemplated that any combination of these values inclusive of the recited values may be used.
A golf club incorporating an interchangeable shaft system 10 of the present invention generally includes a shaft 12, a shaft sleeve 14, a club head 16 and a fastener 18. Interchangeable shaft system 10 may be used by club fitters to repeatedly change shaft 12 and club head 16 combinations during a fitting session. The system permits fitting accounts maximum fitting options with an assembly of parts that is easy to use. In an embodiment, after a desired shaft 12 and club head 16 combination is selected, interchangeable shaft system 10 may be semi-permanently fixed so that disassembly by the average consumer is prevented. Alternatively, interchangeable shaft system 10 may be configured so that a consumer may manipulate the connection to replace shaft 12 or club head 16 and/or to provide adjustability between shaft 12 and club head 16.
As illustrated, the interchangeable shaft system of the present invention is incorporated into a driver style golf club. However it should be appreciated that the interchangeable shaft system of the present invention may be incorporated into any style of golf club. For example, the interchangeable shaft system may be incorporated into putters, wedges, irons, hybrids and/or fairway wood styles of golf clubs.
Club head 16 generally includes a face 24, a crown 25, a sole 26 and a skirt 27 that are combined to form the generally hollow club head 16. Club head 16 also includes hosel 20 that is a structure providing for a secure attachment between shaft 12 and club head 16 during manufacture of the golf club.
Shaft 12 may be any shaft known in the art. For example, shaft 12 may be constructed of metallic and/or non-metallic materials and shaft may be hollow, solid or a combination of solid and hollow portions.
Referring to
In the assembled interchangeable shaft system 10, a distal end portion 34 of shaft 12 is received within a shaft bore 36 of sleeve 14 and is securely attached thereto. Shaft 12 may be securely attached to sleeve 14 using any fastening method. For example, attachment methods such as welding, ultrasonic welding, brazing, soldering, bonding, mechanical fasteners, etc., may be employed. Adhesives such as epoxies or other similar materials may be utilized to securely fasten shaft 12 and sleeve 14. Preferably, end portion 34 is bonded within shaft bore 36 using an adhesive, such as epoxy. Alternatively, the features of shaft sleeve, such as a threaded portion and alignment features may be incorporated into the construction or co-molded with the shaft.
Sleeve 14 is inserted into hosel 20 in a selected orientation that assures that alignment features included on sleeve 14 and hosel 20 are engaged when the interchangeable shaft system is assembled. The orientation of the alignment features provides a desired relative position between shaft 12 and club head 16. Additionally, the engagement of the alignment features provides an anti-rotation feature that prevents relative rotation between sleeve 14 and hosel 20 about the longitudinal axis of hosel 20.
Hosel 20 is a generally tubular member that extends through, or from, crown 25 and at least a portion of club head 16. Hosel 20 defines a sleeve bore 30 that has a diameter selected so that a distal portion of sleeve 14 may be slidably received therein. Preferably, the diameter of sleeve bore 30 is selected so that there is minimal clearance between distal portion of sleeve 14 and hosel 20 to prevent relative lateral motion between sleeve 14 and hosel 20. Sleeve bore 30 terminates at a distal flange 31 which is located at a distal end of hosel 20. It should be appreciated, however, that the flange may be located at any intermediate position between the proximal and distal ends of the hosel.
In the present embodiment, a proximal end 28 of hosel 20 is disposed outward from club head 16 at a location spaced from crown 25 and includes at least one hosel alignment feature that extends through at least a portion of the sidewall of hosel 20. The hosel alignment feature provides at least one discrete alignment orientation between club head 16 and shaft 12 in the assembled golf club. In the present embodiment, hosel 20 includes alignment features in the form of a pair of notches 32 and each notch 32 extends through the sidewall of hosel 20 adjacent proximal end 28, i.e., each notch 32 extends from sleeve bore 30 to the outer surface of proximal end 28 of hosel 20.
It should be appreciated that the hosel alignment feature need not extend entirely through the sidewall of the hosel and may extend through only a portion of the sidewall, as shown in the embodiment illustrated in
Notches 32 are diametrically opposed from each other in proximal end 28 at spaced locations about the proximal end of the generally tubular hosel 20. That configuration allows the combined shaft 12 and sleeve 14 to be coupled to club head 16 in two discrete positions rotated approximately 180° from each other. However, the hosel alignment features may be located in any desired position adjacent proximal end 28 of hosel 20 to provide any desired orientation between sleeve 14 and hosel 20. Although the present invention includes a pair of hosel alignment features, any number of hosel alignment features may be provided to provide any number of discrete orientations between shaft 12 and club head 16. Still further, a single hosel alignment feature may be provided when a single discrete orientation between the shaft and club head is desired.
Sleeve 14 includes a distal body 38, a proximal ferrule 40 and at least one sleeve alignment feature. The present embodiment includes a pair of sleeve alignment features (e.g., tangs 42). Body 38 is generally cylindrical and includes a proximal end that is coupled to a distal end of ferrule 40. The length of shaft sleeve 14 and the diameter of shaft 12 may be selected so that adequate surface area is provided for attachment to shaft 12. Shaft sleeve 14 and shaft 12 are configured to provide approximately 0.5-2.0 in2 of bonding surface area. In an embodiment, shaft sleeve 14 and shaft are selected to provide approximately 1.2 in2 of bonding surface area. In particular, in that embodiment, shaft sleeve 14 has a bonding length of approximately 1.1 inches to provide adequate bonding surface area on a shaft having a 0.335 inch diameter. In the present embodiment, body 38 and ferrule 40 are coupled so that they form a single integrated component, but it should be appreciated that body 38 and ferrule 40 may be separate components.
Tangs 42 extend laterally outward beyond an outer surface of body 38 adjacent the interface between body 38 and ferrule 40. The shape of tangs 42 is selected to complement the shape of notches 32 so that relative rotation about the longitudinal axis of hosel 20 in either direction between sleeve 14 and hosel 20 is prevented when tangs 42 engage notches 32. For example, tangs 42 have a generally trapezoidal cross-sectional shape and that trapezoidal shape is selected to complement and engage the trapezoidal shape of notches 32. Tangs 42 are configured so that they are tapered with the narrowest portion oriented toward the distal end of sleeve 14 and notches 32 are similarly tapered with the narrowest portion oriented toward sole 26 of club head 16. Preferably, the tangs and notches are tapered by an angle of about 0° to about 20° relative to an axis that is parallel to the longitudinal axis of body 38. Additionally, the outer surfaces of tangs 42 are curved with a diameter that is substantially identical to the outer diameter of proximal end 28 of hosel 20 so that the outer surface of tangs 42 are substantially flush with the outer surface of hosel 20 in an assembled golf club. However, it should be appreciated that the outer surface of the tangs and the proximal end of the hosel need not be flush if desired.
The complementary shapes of notches 32 and tangs 42 assure that there is a secure fit between sleeve 14 and hosel 20 when interchangeable shaft system 10 is assembled. In particular, as sleeve 14 is inserted into sleeve bore 30 of hosel 20, the tapered side edges of tangs 42 forcibly abut the tapered side walls of notches 32 to provide a secure fit that assures consistent and repeatable positioning of sleeve 14 relative to hosel 20. The tapered surfaces also prevent rotational play between sleeve 14 and hosel 20 resulting from manufacturing tolerances or wear. Alternatively, the hosel and sleeve alignment features may have curved edges and side walls that engage during assembly to provide a similarly secure fit.
In the present embodiment, the outer diameter of body 38 is smaller than the outer diameter of the distal end of ferrule 40 so that a shoulder 46 is created at the interface between body 38 and ferrule 40. During assembly, body portion 38 of sleeve is inserted into sleeve bore 30 until shoulder 46 is disposed adjacent the top edge of hosel 20. In the present embodiment, the size, taper and/or curvature of the hosel and sleeve alignment features (e.g., tangs 42 and notches 32) are preferably selected so that there is a small amount of clearance between shoulder 46 and hosel 20 when the golf club is assembled. Additionally, with respect to the present embodiment, the size and taper of tangs 42 and notches 32 are selected so that there is a small amount of clearance between the distal end surfaces of tangs 42 and the distal end surfaces of notches 32. That clearance allows the relative position between sleeve 14 and hosel 20 to be easily controlled by manipulating the dimensions of the respective alignment features. Preferably, the amount of clearance between shoulder 46 and hosel 20 is visually imperceptible, or at least not easily noticeable, in the assembled golf club. For example, the amount of clearance may range from 0.005-0.030 inches. In embodiments utilizing a wedge member, described below, the size, taper, and/or curvature of the alignment features are preferably selected so that the end surfaces of the wedge member abut the complementary end surfaces of the shaft sleeve and hosel so that the relative angles between the parts may be more easily controlled.
Sleeve 14 and hosel 20 may be constructed from any metallic or non-metallic material, such as, for example, titanium, steel, aluminum, nylon, fiber reinforced polymer or polycarbonate. Furthermore, sleeve 14 and hosel 20 may be constructed from the same or different materials and as discussed further below each of sleeve 14 and hosel 20 may alternatively have multi-material construction. Additionally, sleeve 14 and/or hosel 20 may be constructed from a material that is a combination of both metallic and non-metallic material, such as a polymer infused or plated with metallic material. In an embodiment, hosel 20 is constructed of titanium and sleeve 14 is constructed from aluminum. Preferably, hosel 20 is formed as an integral part of club head 16.
A coating or surface treatment may also be provided on sleeve 14 and/or hosel 20 to prevent corrosion and/or to provide a desired aesthetic appearance and/or to provide additional structural properties. For example, in embodiments utilizing sleeve 14 constructed from a first metallic material, such as aluminum, and hosel 20 constructed from a second metallic material, such as titanium, sleeve 14 may be anodized to prevent galvanic corrosion. As a further example, a non-metallic sleeve 14 may be coated with nickel to provide the appearance of metallic construction and/or to provide additional strength. The coating may be selected to provide any desired characteristic, for example, to improve strength the coating may be a metallic coating, such as a nickel alloy, having a nanocrystalline grain structure.
Sleeve 14 is securely fastened to club head 16 by fastener 18 to prevent disengagement of sleeve 14 from sleeve bore 30. Fastener 18 is primarily employed to prevent relative motion between sleeve 14 and club head 16 in a direction parallel to the longitudinal axis of hosel 20 by introducing an axial compressive force. Fastener 18 may be any type of fastener that restricts relative motion between sleeve 14 and hosel 20. For example, and as shown in the present embodiment, fastener 18 is an elongate mechanical fastener, such as a machine screw that engages a threaded hole in sleeve 14. Fastener 18 and sleeve 14 are dimensioned to provide sufficient thread length to withstand the axial forces placed upon interchangeable shaft system 10. In one exemplary embodiment, fastener 18 and sleeve 14 are dimensioned to provide ¼ inch of threaded engagement. Additionally, thread inserts may be provided if desired to increase the strength of the threads. For example, a thread insert such as Heli-coil thread inserts (a registered trademark of Emhart, Inc. of Newark, Del.) may be installed into sleeve 14.
As shown in
During assembly, as fastener 18 is tightened, sleeve 14 is drawn into hosel 20. Simultaneously, tangs 42 of sleeve 14 are drawn into notches 32 of hosel 20 and the tapered side edges of tangs 42 forcibly abut the tapered side walls of notches 32. The tapered interface between tangs 42 and notches 32 assures that as fastener 18 is tightened in sleeve 14, the fit between sleeve 14 and hosel 20 becomes progressively more secure and sleeve 14 travels to a predetermined and repeatable position within hosel 20.
The depth of hosel 20 and sleeve bore 30 in club head 16 may be selected so that a desired length of shaft 12 and sleeve 14 are received therein. In the present embodiment, hosel 20 extends only partially into club head 16. It should, however, be appreciated that the hosel may extend through the entire club head so that it intersects the sole, as shown in the golf club of
As previously described, the hosel alignment features are located adjacent proximal end 28 of hosel 20 and extend through at least a portion of the side wall of hosel 20. Locating the hosel alignment features adjacent proximal end 28 of hosel 20 greatly simplifies manufacture of the hosel alignment features and club head 16 because the area is easily accessible. In particular, alignment features having precise tolerances may be incorporated into hosel 20 by simple machining processes and using common tools. For example, a generally trapezoidal hosel alignment feature extending entirely through the sidewall of hosel 20, such as notch 32, may be machined using a tapered end mill that is passed diametrically across proximal end 28 of a cast club head 16. As a result of that location, hosel alignment features having tightly controlled dimensions may be easily constructed with any desired shape by using simple tooling and processes.
The alignment features may be positioned at any location around the circumference of sleeve 14 and hosel 20. Preferably, a pair of alignment features are disposed approximately 180° apart about the circumference of body 38 and hosel 20 (i.e., the alignment features are diametrically opposed) with one of the features being located adjacent face 24 of club head 16. That orientation results in the alignment features being obscured from sight when a user places the club in the address position and views the club along a line of sight that is generally parallel to the longitudinal axis of shaft 12. That orientation also allows the alignment features to be easily viewed by a user during adjustment by viewing club head 16 along a line of sight that is generally normal to face 24.
As an additional feature, a locking mechanism may be provided to prevent fastener 18 from disengaging from sleeve 14. Any locking mechanism may be employed. For example, lock washers may be provided between the head of fastener 18 and the adjacent bearing surface. As a further alternative, a locking thread design, such as a Spiralock locking internal thread form (a registered trademark of Detroit Tool Industries Corp. of Madison Heights, Mich.) may be incorporated into threaded bore 48 of flange 44. As a still further alternative, a thread locking material, such as Loctite thread locking adhesive (a registered trademark of the Henkel Corp. of Gulph Mills, Pa.) may be applied to fastener 18 or threaded bore 48. Still further, fastener 18 may be provided with a locking feature such as a patch lock. Additionally, a bonding material, such as epoxy may be applied to the head of fastener 18 at an interface with club head 16 after assembly.
As a still further feature, a retainer 56 may be employed so that fastener 18 is retained within club head 16 when it is not engaged with sleeve 14. During replacement of shaft 12 it is desired that fastener 18 is retained within club head 16 so that it is not misplaced. Retainer 56 is coupled to the shank of fastener 18 and located so that a flange is interposed between retainer 56 and the head of fastener 18. Retainer 56 is sized so that it is not able to pass through the through hole of the respective flange. Retainer 56 may be a clip that is frictionally coupled to the shank of fastener 18 adjacent flange 31 of hosel 20 located so that flange 31 is interposed between retainer 56 and the head of fastener 18.
Referring to
Body 65 is generally cylindrical and includes a proximal end that is located adjacent a distal end of ferrule 69 when assembled on a shaft. The proximal end of body 65 includes notches 71 that are sized and shaped to complement the size and shape of tangs 67. In particular, notches 71 are preferably sized and shaped so that there are no gaps between the distal surface of ferrule 69 and the proximal end surface of body 65 or between the side surfaces of tangs 67 and the side surfaces of notches 71. Additionally, the thickness of tangs 67 is selected so that when shaft sleeve 63 is assembled, portions of tangs 67 extend radially outward beyond the outer surface of body 65. As a result, that portion of tangs 67 extending radially outward from body 65 is available to engage engagement features provided in the proximal end portion of the hosel of a golf club head as described above.
Referring to
Body 66 and ferrule 70 may be constructed from any materials and they may be constructed from the same or different materials. For example, body 66 may be machined from a metallic material, such as aluminum, and ferrule 70 may be molded or machined from a non-metallic material, such as nylon. Different materials may be used to provide weight savings over an entirely metallic sleeve while still providing adequate structural qualities and bonding surface area. Additionally, different materials may be selected to provide desired aesthetic properties.
The body of any embodiment of the shaft sleeve may further include weight reducing features if desired. For example, and as shown in
A further embodiment of the shaft sleeve is illustrated in
A still further embodiment of the shaft sleeve is shown in
In the present embodiment, sleeve 94 utilizes a multi-piece construction. Sleeve 94 includes body 96 that is integral with ferrule 98 and sleeve alignment features that are formed by a separate pin 100 that is coupled to body 96 and ferrule 98. Pin 100 extends diametrically across the interface of body 96 and ferrule 98 and is securely coupled to body 96 and ferrule 98. The length of pin 100 is selected so that the ends of pin 100 extend laterally outward beyond the outer surface of body 96. Preferably, each end of pin 100 extends laterally outward of body 96 by a distance corresponding to the thickness of the side wall of hosel 92 of the club head so that the ends of pin 100 are generally flush with the outer surface of hosel 92. Although pin 100 is illustrated as a generally cylindrical member, it should be appreciated that it may have any desired cross-sectional shape and hosel 92 may include hosel alignment features having any complementary shape. For example, pin 100 may be a key having any polygonal cross-sectional shape, such as a triangle, trapezoid, square, rectangle, diamond, etc.
The interchangeable shaft system of the present invention may be configured to provide adjustability for the angular attributes of an assembled golf club, including face angle, lie and loft. As described above, the configuration of the hosel and sleeve alignment features provide discreet orientations of the sleeve relative to the hosel. The shaft may be mounted to the sleeve so that the shaft is not coaxial with the sleeve. That misalignment allows each of the discreet orientations of the sleeve relative to the hosel to correspond to a different orientation of the shaft to the club head. For example, by mounting the shaft to the sleeve so that the longitudinal axis of the shaft is rotated relative to the shaft, the angular attributes of the assembled golf club may be adjustable by changing the orientation of the shaft sleeve relative to the hosel.
As shown in
The direction of the rotational offset between axis A and axis B may positioned relative to the hosel and sleeve alignment features so that rotation of the sleeve within the hosel between the two positions alters the club face angle. In particular, the sleeve may be coupled to the hosel in a first position corresponding to a first configuration wherein the club face is opened. The sleeve may then be coupled to the hosel in a second position, e.g., the sleeve is rotated 180° from the first position, which corresponds to a second configuration wherein the club face is closed. It should be appreciated that the positions may be any combination of closed, neutral or opened club face orientations and in some embodiments both positions may be closed or opened, but by different amounts. It should be appreciated that shaft 102 and sleeve 104 may be coupled so that more than two configurations are provided. For example, the sleeve and accompanying golf club head may be configured so that there are more than two relative configurations thereby providing adjustability in multiple combinations of angular attributes.
Additionally, the depth of the hosel alignment features may be different and, as a result, a golf club including the interchangeable shaft system of the present invention may be adjustable for overall length by providing a plurality of hosel alignment features having different depths. For example, in an embodiment, a pair of hosel alignment features having different depths from the proximal end of the hosel are provided in a golf club head. A shaft sleeve is provided that includes a single sleeve alignment feature that is sized and shaped to engage either of the hosel alignment features. In a first configuration, the sleeve alignment feature is engaged with the deeper hosel alignment feature, which results in the sleeve being drawn into the hosel to a first depth and thereby providing a first overall golf club length. In a second configuration, the sleeve alignment feature is engaged with the shallower hosel alignment feature, which results in the sleeve being drawn into the hosel to a second depth that is less than the first depth and thereby providing a second overall golf club length that is less than the first.
Referring to
Sleeve 122 includes a body 134 and alignment features (e.g., tangs 136). Sleeve 122 includes a separate ferrule 132. In the assembled golf club, body 134 of sleeve 122 is at least partially received within a sleeve bore 138 of hosel 128. Body 134 is oriented so that tangs 136 engage complementary alignment features of hosel 128 (e.g., notches 140).
Fastener 126 is integrated into and forms a portion of ferrule 132. In particular, fastener 126 is a distal portion of ferrule 132 that is configured to mechanically engage a portion of hosel 128. For example, fastener 126 is a portion of ferrule 132 that includes a threaded internal 144 surface and is configured to threadably engage a threaded outer surface 146 of hosel 128.
Ferrule 132 also includes a bearing surface 142. Bearing surface 142 forcibly abuts a proximal end surface of sleeve 122 when interchangeable shaft system 120 is assembled. During assembly, shaft 124 is inserted through ferrule 132 so that ferrule 132 is able to slide on and rotate relative to shaft 124. Next, sleeve 122 is coupled to the distal end of shaft 124. The dimensions of sleeve 122 are selected so that ferrule 132 is prevented from sliding past sleeve 122 toward the distal end of shaft 124. Sleeve 122 is then inserted into sleeve bore 138 so that tangs 136 engage notches 140 with sleeve 122 in a desired rotational orientation. Finally, ferrule 132 is slid along shaft 124 until bearing surface 142 abuts sleeve 122 and fastener 126 is threaded on hosel 128.
Indicia may be provided to clearly indicate the configuration of the shaft relative to the club head in the assembled golf club. For example, and as described above, the shaft may be coupled to the shaft sleeve so that the club can be assembled in a first or second configuration. Indicia may be placed on the shaft sleeve and/or the hosel to indicate the assembled configuration. The indicia may be positioned so that they are visible only during assembly or during and after assembly, as desired.
Referring to
As shown in
As shown in
Additional examples of indicia are illustrated in
The interchangeable shaft system of the present invention provides advantages over conventional methods of club fitting. In a conventional fitting session a user is required to make test swings with a plurality of non-adjustable samples of a single golf club. For example, a conventional fitting cart, or bag, generally includes a plurality of sample 6-Irons having multiple configurations. The user is required to try many of those sample clubs to try to determine which sample includes the most appropriate configuration. However, because each sample club is not adjustable, differences between the individual components of the plurality of sample clubs introduce additional variables into the fitting process and the fitting cart, or bag, is required to include many separate and complete sample clubs.
A method of fitting golf clubs to a user utilizing the interchangeable shaft system of the present invention removes many of those additional variables and reduces the number of required complete sample clubs by minimizing the number of components required for the fitting process. The interchangeable shaft system allows a single club head to be used throughout the fitting process with different shafts and/or by altering the orientation of a single shaft relative to the club head. The system also allows different club heads to be utilized with a single shaft if desired.
The method includes providing a golf club including the interchangeable shaft system of the present invention in a first configuration. Next, the user swings the golf club while it is in the first configuration. The user's swing and the ball flight characteristics are analyzed and the interchangeable shaft system of the golf club is disassembled and re-assembled into a second configuration. The user then swings the golf club while it is in the second configuration and the user's swing and the ball flight characteristics are analyzed. These steps may be repeated with any number of golf club configurations. Finally, the proper club configuration for the user is determined based on the analyses of the user's swings.
During the re-assembly of the interchangeable shaft system into a second configuration, many different operations may be preformed. For example, the combined shaft and sleeve that was included in the golf club in the first configuration may be re-oriented relative to the club head to provide a change in one, or combinations, of the angular attributes of the golf club. Alternatively, the shaft and sleeve combination may be substituted and a different shaft and sleeve attached to the club head. A substitution of the shaft and sleeve combination may be desired to change angular attributes and/or any other physical attribute of the golf club, such as shaft flexibility, shaft length, grip style and feel, etc.
Another embodiment of a golf club including an interchangeable shaft system of the present invention is illustrated in
Sleeve 162 includes a body 174 and alignment features (e.g., tangs). Body 174 includes a shaft portion 175 and a fastener portion 179. Shaft portion 175 is generally tubular and defines a shaft bore 178. Fastener portion 179 is generally cylindrical and has an outer diameter that is less than or equal to the outer dimension of shaft portion 175. Fastener portion 179 includes a threaded bore that engages fastener 166.
In the assembled golf club, body 174 of sleeve 162 is at least partially received within sleeve bore 180 of hosel 168. Body 174 is oriented so that the alignment features of sleeve 162 engage complementary alignment features of hosel 168 (e.g., notches). Additionally, a ferrule 172 may be included that abuts the proximal end of shaft sleeve 162 to provide a tapered transition between shaft sleeve 162 and shaft 164.
Fastener 166 is an elongate mechanical fastener, such as a machine screw that engages a threaded hole in sleeve 162. Fastener 166 and sleeve 162 are dimensioned to provide sufficient thread engagement length to withstand the axial forces placed upon interchangeable shaft system 160.
A flange 176 is included within hosel 168 at an intermediate position along the length of hosel 168. Flange 176 is generally annular so that it includes a through hole that is sized so that the threaded shank of fastener 166 extends through the hole and so that the head of fastener 166 is prevented from passing through the hole. Flange 176 provides a bearing surface for the head of fastener 166 when it is engaged with sleeve 162 so that fastener 166 may be placed in tension when tightened in the threaded bore of sleeve 162.
Interchangeable shaft system 160 also includes a retainer 177 to retain fastener 166 within hosel 168 of club head 170 when it is not engaged with sleeve 162 such as during replacement or orientation of the shaft. Retainer 177 is a tubular body that is slidably received within hosel 168 on the side of hosel 168 closest to sole 173 so that the head of fastener 166 is disposed between retainer 177 and flange 176. The inner diameter of retainer 177 is selected so that it is smaller than the outer diameter of the head of fastener 166 but larger than the outer dimension of a tool that is utilized to rotate fastener 166. Alternatively, the retainer may be a solid plug that is preferably removable so that the retainer may be removed to access fastener 166.
Additionally, the swing weight of a golf club incorporating the interchangeable shaft system of the present invention may be altered using a sleeve having a desired weight. During assembly of a golf club, the club head is often weighted to compensate for manufacturing tolerances and/or to create a desired swing weight. In the present embodiment, shaft sleeve configurations having various weights may be provided so that they may be easily matched with the weights of the other components to provide the desired swing weight.
Referring to
Referring to
The materials and sizes of the weights of the embodiments described above are selected to provide a desired final weight of the shaft sleeve. Shaft sleeves having various weights may be constructed so that the shaft sleeve can be matched to the weight of a club head during assembly to provide a desired swing weight. The weights are generally constructed from a material that has a different density than the remainder of the shaft sleeve. For example, to add mass to an aluminum shaft sleeve a weight constructed of titanium, steel and/or tungsten may be employed. Additionally, a powder filled polymer, such as a tungsten filled thermoplastic may be employed. The mass of an aluminum shaft sleeve may be reduced by employing a weight constructed of a material having a lower density than aluminum such as polycarbonate or fiber reinforced plastic.
Referring to
Tangs 216 extend laterally outward beyond an outer surface of body 214. The shape of tangs 216 is selected to complement the shape of notches included in a hosel of a complementary golf club head so that relative rotation about the longitudinal axis of the hosel between sleeve 212 and the hosel is prevented when tangs 216 engage the notches. Similar to previously described embodiments, tangs 216 have a generally trapezoidal cross-sectional shape and that trapezoidal shape is selected to complement and engage trapezoidally shaped notches.
Relative rotation between the shaft sleeve and the hosel is prevented by engagement between alignment features on the shaft sleeve and on the hosel. In particular, abutment between side surfaces 217 of tangs 216 and corresponding side surfaces of the complementary hosel alignment features. Side surfaces 217 may be oriented to alter the magnitude of the normal and tangential forces that are placed on the abutting side surfaces.
Referring to
In another embodiment, shown in
Referring to
Sleeve 252 includes a body and alignment features (e.g., tangs 262). The body includes a shaft portion 267 and a fastener portion 268. Shaft portion 267 is generally tubular and defines a shaft bore. Fastener portion 268 is also generally cylindrical and includes a threaded bore that engages fastener 256.
Shaft sleeve 252 includes a pair of tangs 262 that include generally cylindrical side surfaces 266. The cylindrical side surfaces of the opposing tangs 262 are concentric and have the same radius of curvature. Hosel 258 includes alignment features in the form of notches 272 that also have cylindrical side surfaces 274 that are concentric and abut the cylindrical side surfaces of tangs 262 in the assembled interchangeable shaft system 250. It should be appreciated that side surfaces 274 of notches 272 may alternatively be polygonal so that the cylindrical side surfaces 266 of tangs 262 contact side surfaces 274 at a plurality of tangential contact points.
As illustrated in
The outer diameter of the portion of shaft sleeve 252 that extends into hosel 258 is selected so that so that clearance is provided between shaft sleeve 252 and an internal surface of hosel 258 for the desired tilt angular travel. Additionally, the size of bores 276, 278 are selected so that clearance is provided for fastener 256 throughout the range of motion of shaft sleeve 252.
An alignment member 280 is provided in a fastener bore 281 provided in a sole of golf club head 260. Alignment member 280 may be used to retain fastener 256 so that shaft sleeve 252 is maintained in a selected orientation. A plurality of alignment members may be provided, each configured to align fastener 256 and shaft sleeve 252 in a particular orientation. In the present embodiment, a pair of alignment members 280 is provided. A first alignment member 280a is provided for the orientations of shaft sleeve 252 illustrated in
The adjustability provided by interchangeable shaft system 250 is illustrated schematically in
The alignment member included in the interchangeable shaft system may have various configurations. In an embodiment, shown in
Weight cavity 290 may be used to include a separate weight member 298 or may be left empty to reduce the weight of alignment member 284. A weight member 298 may be included to alter the swing weight of a golf club head including alignment member 284 and by including weight member 298 in alignment member 284, the additional weight is located near the shaft axis. Such a location provides alternate swing weights while having minimal impact on the moment of inertia about the shaft axis so that it does not significantly impact the ability to rotate the club about the shaft axis. Additionally, the additional weight is located adjacent the sole which is generally preferred to avoid raising the center of gravity of the golf club head.
Another alignment member is shown in
As an alternative, a compressible member 316, such as a compressible washer or sleeve, and a limit stop 318 may be disposed on fastener 306 between shaft sleeve 308 and hosel 310. Compressible member 316 is compressed between limit stop 318 and hosel 310 when fastener 306 is retracted and urges shoulder 314 to remain in a counterbore 312 to assist in positioning fastener 306 during use. In another embodiment, shown in
Referring to
The shape of the alignment member and the fastener bore are selected to provide desired mobility. The body of alignment member may have a cross-sectional shape that allows it to be received in the fastener bore in one of a plurality of orientations, such as by being shaped as an oval, a star, a polygon or any other shape that allows that mobility. Alternatively, the body of the alignment member may be circular in cross-section so that it may be rotated within the fastener bore to allow continuous adjustment. As a still further alternative, the body of the alignment member may be shaped so that there is only one possible orientation within the fastener bore, such as by making the alignment member asymmetrically shaped.
Referring to
In an embodiment, shaft sleeve 342 includes a shaft bore 345 that has a longitudinal axis that is not coaxial with the body of shaft sleeve 342 so that when shaft sleeve 342 is coupled to the distal end of shaft 344, the longitudinal axis of shaft sleeve 342 is angled relative to the longitudinal axis of shaft 344 by shaft angle α. As described herein, the maximum angular deflection plane of the shaft sleeve 342 is a cross-sectional plane that extends through the longitudinal axis of shaft sleeve 342 and through the central axis of shaft bore 345 so that the greatest angular difference between shaft sleeve 342 and shaft 344 when it is inserted into shaft bore 345 is coincident with that plane. Shaft angle α is preferably less than about 10°, and more preferably less than about 5°.
Opposite end surfaces 346 of wedge member 341 are angled relative to each other so that when wedge member 341 is interposed between shaft sleeve 342 and hosel 347, the orientation of shaft 344 relative to club head 343 is defined by a combination of the positions of wedge member 341 relative to club head 343 and shaft sleeve 342 relative to club head 343.
Wedge member 341 includes a cylindrical tubular body 348 that has planar end surfaces 346 that are angled relative to each other by a wedge angle β so that the surfaces are non-parallel and the alignment features extending away from those surfaces are angled relative to each other. Wedge angle β is preferably less than about 10°, and more preferably less than about 5° and less than shaft angle α. In the present embodiment, a distal end surface of wedge member 341 is generally normal to the longitudinal axis of cylindrical body 348 and a proximal end surface is angled relative to the longitudinal axis of cylindrical body 348. As a result, wedge member has a maximum length portion 350 that is approximately diametrically opposed to a minimum length portion 351 and wedge member 341 defines a maximum angular deflection plane. As described herein, the maximum angular deflection plane of the wedge member is a cross-sectional plane that extends across the wedge member and through the minimum length portion and maximum length portion so that the greatest angular difference between the proximal end surface and the distal end surface of the wedge is coincident with that plane. For example, as shown in
Shaft sleeve 342 is inserted into wedge member 341 and into hosel 347 so that the three components have a desired relative orientation. The plurality of alignment features included on shaft sleeve 342, wedge member 341 and hosel 347 provide a plurality of discrete orientations of the shaft relative to the club head. In the illustrated embodiment, the alignment features are configured so that there are four discrete relative orientations between wedge member 341 and hosel 347 and four discrete relative orientations between shaft sleeve 342 wedge member 341. In particular, the alignment features of shaft sleeve 342 include four tangs 354 equally spaced circumferentially around shaft sleeve 342. Tangs 354 are sized and shaped to complement notches 356 included in a proximal end of wedge member 341. The distal end of wedge member 341 includes alignment features, e.g., four tangs 358, that are sized and shaped to complement alignment features included in a proximal end of hosel 347, e.g., notches 360. In the assembled interchangeable shaft system 340, tangs 354 of shaft sleeve 342 are engaged with notches 356 of wedge member 341 and tangs 358 of wedge member 341 are engaged with notches 360 of hosel 347.
After shaft sleeve 342 is inserted into wedge member 341, retainer 362 is coupled to shaft sleeve 342 so that wedge member 341 is retained on shaft sleeve 342. Retainer 362 is coupled to a distal end of shaft sleeve 342 so that wedge member 341 is permitted to slide between retainer 362 and tangs 354. As a result, the loft and lie orientation of shaft 344 relative to golf club head 343 may be changed without fully disassembling interchangeable shaft system 340 and it prevents loss of wedge member 341 if the system is fully disassembled. For example, the length of engagement of fastener 349 may be selected to be greater than the length of engagement of each of the sets of alignment features so that components of interchangeable shaft system 340 may be reoriented without fully disassembling the system.
In another embodiment, the shaft sleeve includes a shaft bore that has a longitudinal axis that is coaxial with the body of the shaft sleeve. In such an embodiment, a wedge member provides angular adjustability while maintaining the rotational position of the shaft and grip. As a result, directional shafts and grips may be maintained in a desired orientation. Directional shafts include those with physical attributes, such as stiffness, kick point, etc., that depend on the direction and location of the forces placed on the shaft or those with asymmetric graphics. Directional grips include those with visible or tactile orientation reminders, often referred to as reminder grips.
The magnitudes of shaft angle α and wedge angle β and the location and number of alignment features are selected so that a desired range of motion and number of discrete orientations may be provided. For example, in embodiments in which the maximum angular displacement plane of the combined shaft sleeve and shaft and the maximum angular displacement plane of the wedge member may be aligned, the magnitude of the range of angular motion is provided by the addition of shaft angle α and wedge angle β and the number of discrete orientations depends on whether shaft angle α has the same magnitude as wedge angle β.
In shown in
Referring to
The number and location of the alignment features of the shaft sleeve, the wedge member, and/or the hosel of the embodiments of the interchangeable shaft system of the present invention may be oriented so that the maximum deflection plane may have any predetermined orientation relative to the club head. As a result, the patterns presented by the available orientation positions of the shaft relative to the club head may be altered to provide a desired adjustability pattern. For example, to provide an embodiment having two available orientations with different face angles and constant lie angle an interchangeable shaft system, such as that shown in
In another example, an interchangeable shaft system is provided that has two available orientation positions in which only the lie angle is altered. Such an embodiment may be incorporated into any type of golf club, but it may be especially beneficial for an iron-type golf club because during fitting it is often desired to alter the lie angle without altering the loft angle so that the ball flight distance gaps between irons are maintained. In such an embodiment, an interchangeable shaft system, such as that shown in
Referring to
In another embodiment, a system having a wedge member and a shaft sleeve with different magnitudes of angular displacement are provided which provides additional loft and lie orientations, as illustrated in
The available orientations of the planes of maximum angular displacement may be altered, as compared to the previous embodiments, to provide a rectangle-shaped orientation matrix that provides interior orientations. Preferably, the loft values are the same for each available lie value in the matrix, as provided by the embodiments illustrated in
Referring to
Referring to
Referring to
Referring to
Shaft sleeve 392 includes a body 400 and a plurality of alignment features (e.g., tangs 404). Body 400 defines a shaft bore 402 that receives the distal end of shaft 394. The shaft bore 402 may be coaxial or angled relative to the longitudinal axis of shaft sleeve 392, depending on whether angular adjustability is desired. Tangs 404 extend laterally outward beyond an outer surface of body 400 near to a proximal end of body 400 than a distal end.
Extension member 391 includes a cylindrical tubular body that has planar end surfaces 396 that are parallel to each other and normal to a longitudinal axis of extension member 391. Extension member 391 is interposed between a portion of shaft sleeve 392 and hosel 397 to distance those components by a predetermined length. In particular, the length of extension member 391 is selected for a desired spaced relation between shaft sleeve 392 and hosel 397. The length of extension member 391 is preferably in a range of about 0.125 inch to about 3.0 inches. A plurality of extension members 391 having different lengths may be provided so that the length of a golf club incorporating the system may be created. As a further alternative, planar end surfaces 396 may be non-parallel to each other so that wedge members having different lengths may be provided to adjust angular attributes and the length of the golf club.
In the assembled system 390, shaft sleeve 392 is inserted into extension member 391 and into hosel 397. It should be appreciated that the portion of shaft sleeve 392 extending into hosel 397, if any, is dependent on the length of extension member 391 and the desired range of length adjustment. Alignment features are included on shaft sleeve 392, extension member 391 and hosel 397 so that relative rotation between the components is prevented when the system is fully assembled and tightened. In the illustrated embodiment, the alignment features of shaft sleeve 392 include tangs 404 equally spaced circumferentially around shaft sleeve 392. Tangs 404 are sized and shaped to complement notches 406 included in a proximal end of extension member 391. The distal end of extension member 391 includes alignment features, e.g., tangs 408, that are sized and shaped to complement alignment features included in a proximal end of hosel 397, e.g., notches 410. In the assembled interchangeable shaft system 390, tangs 404 of shaft sleeve 392 are engaged with notches 406 of extension member 391 and tangs 408 of extension member 391 are engaged with notches 410 of hosel 397.
Fastener 399 extends through a portion of club head 393 and hosel 397 and engages a threaded aperture disposed in a distal head portion 412 of fastener extension 398. A shank portion 414 of fastener extension 398 extends proximally from head portion 412 and engages shaft sleeve 392. Preferably, head portion 412 has an outer diameter that is approximately equal to the inner diameter of hosel 397 so that engagement between head portion 412 and hosel 397 provides co-axial alignment between shaft sleeve 392 and hosel 397. It should be appreciated that a fastener having sufficient length to engage shaft sleeve 392 may be used rather than incorporating the intermediate fastener extension 398. In embodiments utilizing fastener extension 398, multiple fastener extensions may be provided that are constructed from different materials to provide swing weight adjustment and overall head weight adjustment. For example, the fastener extension may be constructed from any material that provides sufficient strength for impact such as titanium, steel, tungsten, aluminum, etc.
Referring to
Shaft sleeve 422 includes a shaft bore 434 that has a longitudinal axis that is not coaxial with the body of shaft sleeve 422. As a result, when shaft sleeve 422 is coupled to the distal end of shaft 424, the longitudinal axis of shaft sleeve 422 is angled (i.e., not coaxial) relative to the longitudinal axis of shaft 424 by shaft angle α.
Wedge member 421 includes an alignment portion 436 and a support portion 438 Alignment portion 436 includes alignment features that extend outward from an outer surface of support portion 438. Opposite end surfaces 437 of alignment portion 436 of wedge member 421 are angled relative to each other so that when wedge member 421 is interposed between shaft sleeve 422 and hosel 427, the orientation of shaft 424 relative to club head 423 is defined by a combination of the positions of wedge member 421 relative to club head 423 and shaft sleeve 422 relative to club head 423.
End surfaces 437 are angled relative to each other by a wedge angle β so that the surfaces are non-parallel and the alignment features extending away from those surfaces are angled relative to each other. In the present embodiment, a distal end surface of alignment portion 436 is generally normal to the longitudinal axis wedge member 421 and a bore 440 extending through wedge member 421 and a proximal end surface is angled relative to the longitudinal axis of wedge member 421 and bore 440. Bore 440 is sized to provide clearance for shaft sleeve 422 to extend through bore 440 and to be angled relative thereto.
Shaft sleeve 422 is inserted into wedge member 421 and into hosel 427 so that the three components have a desired relative orientation. The plurality of alignment features are included on shaft sleeve 422, wedge member 421 and hosel 427 so that a plurality of discrete orientations is provided. As described above, the magnitudes of shaft angle α and wedge angle β and the location and number of alignment features are selected so that a desired range of motion and number of discrete orientations may be provided.
After shaft sleeve 422 is inserted into wedge member 421, retainer 432 is created on shaft sleeve 422 so that wedge member 421 is retained on shaft sleeve 422. Retainer 432 is a feature, such as a bump, that extends from an outer surface of shaft sleeve 422. Retainer 432 is sized so that it creates an effective outer diameter of shaft sleeve 422 that is greater than the diameter of bore 440 so that wedge member 421 is prevented from sliding past retainer 432 and off of shaft sleeve 422.
Fastener 429 includes a shank 442 and head 444. Head 444 includes a curved bearing surface that interfaces with a curved surface of a washer 446. The curved bearing surface of head 444 is free to slide against the curved surface of washer 446 while shaft sleeve 422 is oriented. Additionally, washer 446 is sized so that it is able to slide within fastener bore 448 during manipulation of the angular orientation of shaft sleeve 422 relative to the hosel.
Referring to
Similar to other embodiments, shaft sleeve 452 includes a body 460 and a plurality of alignment features (e.g., tangs 464). Body 460 defines a shaft bore 462 that receives the distal end of shaft 454. The shaft bore 462 may be coaxial or angled relative to the longitudinal axis of shaft sleeve 452, depending on whether angular adjustability is desired. Tangs 464 extend laterally outward beyond an outer surface of body 460 nearer to a proximal end of body 460 than a distal end.
Extension member 451 includes an alignment portion 466 and a support portion 468. Alignment portion 466 includes alignment features that extend outward from an outer surface of support portion 468. Opposite end surfaces 474 of alignment portion 466 are parallel to each other and normal to a longitudinal axis of extension member 451. A portion of extension member 451 is interposed between a portion of shaft sleeve 452 and hosel 457 to distance those components by a predetermined length. In particular, the length of alignment portion 466 of extension member 451 is selected for a desired spaced relation between shaft sleeve 452 and hosel 457. The length of extension member 451 is preferably in a range of about 0.125 inch to about 3.00 inches. A plurality of extension members 451 having different lengths may be provided so that the length of a golf club incorporating the system may be adjusted.
Alignment features are included on shaft sleeve 452, alignment portion 466 and hosel 457 so that relative rotation between the components is prevented when the system is assembled and tightened. In the illustrated embodiment, the alignment features of shaft sleeve 452 include tangs 464 equally spaced circumferentially around shaft sleeve 452. Tangs 464 are sized and shaped to complement notches 465 included in a proximal end of extension member 451. The distal end of extension member 451 includes alignment features, e.g., tangs 467, that are sized and shaped to complement alignment features included in a proximal end of hosel 457, e.g., notches 470. In the assembled interchangeable shaft system 450, tangs 464 of shaft sleeve 452 are engaged with notches 465 of extension member 451 and tangs 467 of extension member 451 are engaged with notches 470 of hosel 457.
Fastener 459 extends through a portion of club head 453 and hosel 457 and engages a threaded aperture disposed in a distal head portion 462 of fastener extension 458. A shank portion 463 of fastener extension 458 extends proximally from head portion 462 and engages shaft sleeve 452. Preferably, head portion 462 has an outer diameter that is approximately equal to the inner diameter of hosel 457 so that engagement between head portion 462 and hosel 457 provides co-axial alignment between shaft sleeve 452 and hosel 457. It should be appreciated that a fastener having sufficient length to engage shaft sleeve 452 may be used rather than incorporating the intermediate fastener extension 458. In embodiments, utilizing fastener extension 458, multiple fastener extensions may be provided that are constructed from different materials to provide swing weight adjustment and overall head weight adjustment. For example, the fastener extension may be constructed from any material that provides sufficient strength for impact such as titanium, steel, tungsten, aluminum, etc.
A spacer 472 is also included on fastener extension 458. Spacer 472 extends from head portion 462 and along shank portion 463. A proximal portion of spacer 472 has an outer diameter that is approximately equal to a bore a bore that extends through extension member 451 to maintain alignment of fastener 459 with hosel. Spacer 472 may be constructed from any material, such as polyurethane, ABS plastic, steel, aluminum, titanium or tungsten or combinations thereof to provide any desired weight.
Indicia may be provided on the shaft sleeve, wedge member, and/or hosel of a dual angle adjustable system. The indicia is provided to designate the orientation of the club head quantitatively, qualitatively or a combination thereof. The indicia may be included on any portion of the club head, shaft sleeve, shaft and/or wedge member of the assembled golf club. Preferably, indicia are provided on or adjacent the alignment features of the shaft sleeve, the wedge member and/or the hosel. The indicia may be engraved, raised, printed and/or painted and they may be one or more letters, numbers, symbols, dots and/or other markings that differentiate the available configurations of the golf club.
Referring to
An example of qualitative indicia is illustrated in
Another embodiment of indicia that combine both qualitative and quantitative information regarding the orientation of a club head 503 is shown in
Various kits may be provided that include a golf club utilizing the adjustability of the interchangeable shaft system. In one kit, a golf club head, a shaft with a shaft sleeve and a plurality of wedge members are provided. Preferably, the magnitudes of the angular displacement of the shaft sleeve and one of the plurality of wedge members are identical so that a golf club can be configured with the nominal (i.e., designed) loft and lie. Another of the plurality of wedges has a magnitude of angular displacement that is different than the shaft sleeve so that a larger matrix of available loft and lie orientations is provided.
In another embodiment of the kit, at least one club head and a plurality of shaft assemblies are provided. The shaft assemblies each include a shaft, a shaft sleeve, and a wedge member. One of the shaft assemblies includes a wedge member having a magnitude of angular displacement that is either the same as the shaft sleeve or 0° (i.e., the wedge member is an extension member similar to those providing adjustable length) so that a neutral orientation is provided. A plurality of club heads may be provided having different designed angular attributes. Additionally, the shaft assemblies may be configured to provide different orientations of the planes of maximum displacement of the wedge member and shaft sleeve so that a rectangular or diamond-shaped matrix of loft and lie orientations may be provided. By providing a plurality of shaft assemblies or wedge members, the available loft and lie orientations for a golf club created from the kit becomes a composite of the loft and lie orientations available from each shaft assembly. As a result, a greater array of available orientations may be provided.
A golf club incorporating a dual angle adjustable interchangeable shaft system of the present invention may be used in a method of fitting. In one method, the golf club is provided in a neutral position and the user strikes one or more golf balls using the club. The ball flight characteristics are analyzed. A preferable loft and lie orientation zone is selected and the golf club is adjusted to provide a configuration within the selected zone. The user utilizes the club in that second configuration and the ball flight characteristics are analyzed. Preferably, a plurality of orientations within the selected zone are tested to determine a preferable loft and lie orientation for the user. In another method, the golf club is initially provided in at least one of the loft and lie orientations that is closest to the neutral, or design, loft and lie values and the remainder of the method steps described above are performed.
The embodiments of the present invention are illustrated with driver-type clubs. However, it should be understood that any type of golf club can utilize the inventive interchangeable shaft system. For example, an iron-type golf club may include an interchangeable shaft system, and further, the interchangeable shaft system may be configured to adjust the lie angle of the club. Additionally, the interchangeable shaft system can be used with non-golf equipment, such as fishing poles, aiming sights for firearms, plumbing, etc.
Interchangeable shaft systems that are particularly well-suited for adjusting lie angle in an iron-type golf clubs will be described with reference to
Golf club 510 is generally constructed from a golf club head 512, a golf club shaft 514, a shaft sleeve assembly 516, a wedge member 518 and a fastener 520. Shaft sleeve assembly 516 and fastener 520 provide a construction that attaches shaft 514 to club head 512 so that wedge member 518 is interposed between a portion of club head 512 and a portion of shaft assembly 516.
Golf club head 512 is constructed as an iron-type golf club head and includes a face 522 that defines a striking surface 524 that is bound by a top line 526, a leading edge 528, a toe portion 530, a heel portion 532, and a hosel 534 that extends from heel portion 532. Hosel 534 defines a hosel bore 536 that is shaped to receive fastener 520 and a portion of shaft sleeve assembly 516, and the proximal end of hosel 534 is shaped to engage wedge member 518 in the assembled golf club 510. A proximal portion of hosel bore 536 receives a distal portion of shaft sleeve assembly 516 and a distal portion of hosel bore 536 forms a fastener bore 539 that receives fastener 520 and is separated from the proximal portion of the hosel bore by a flange 540. The proximal end of hosel 534 is shaped to complement a distal end of wedge member 518, and in the present embodiment includes a generally planar end surface and a plurality of hosel alignment features, in the form of a pair of diametrically opposed notches 538.
Shaft 514 generally extends between club head 512 and a grip (not shown) that is grasped by a golfer during use. Shaft 514 is coupled to club head 512 through shaft sleeve assembly 516, and in particular, a distal end portion of shaft 514 is coupled to a sleeve body 542 of shaft sleeve assembly 516, which is coupled to club head 512. Shaft 514 may have any construction known in the art. For example, shaft 514 may be constructed from metallic and/or non-metallic materials and it may be stepped and/or tapered.
Shaft sleeve assembly 516 includes sleeve body 542 and tension member 544. Sleeve body 542 and tension member 544 are coupled by a flexible coupling that permits sleeve body 542 and tension member 544 to be rotated relative to each other so that a longitudinal axis of sleeve body 542 may be rotated relative to a longitudinal axis of tension member 544, as shown in
Sleeve body 542 is constructed with a tubular portion 546, a plurality of shaft sleeve alignment features (e.g., tangs 548), a post 550 extending from tubular portion 546, and a ball 552 extending from a distal end of post 550. Tubular portion 546 defines a shaft bore 554 that receives a distal end of shaft 514. The length of tubular portion 546 is selected to provide adequate bonding length to adhere the distal end portion of shaft 514 to sleeve body 542.
Tangs 548 extend distally from a distal end of tubular portion 546 and are shaped and sized to complement corresponding alignment features on an adjacent part, such as wedge member 518 in the illustrated embodiment. Tangs 548 are generally trapezoidally-shaped and complement a plurality of trapezoidally-shaped notches 556 included in a proximal end surface 558 of wedge member 518. Tangs 548 are formed as teeth that extend radially outward from post 550 to an outer surface of the tubular portion 546 of sleeve body 542. In the present embodiment, a pair of tangs 548 are provided on sleeve body 542 and a pair of notches are provided on the proximal end surface of wedge member 518, which mates with sleeve body 542, so that sleeve body 542 may be oriented in two positions relative to wedge member 518.
Post 550 and ball 552 provide an attachment structure that is directly coupled to tension member 544 to provide the flexible coupling. Post 550 extends from and couples ball 552 to tubular portion 546. Ball 552 is received in a proximal portion of tension member 544 so that it is able to rotate within tension member 544 by a predetermined angle θ, that is preferably between about 2° and about 10°. The size of post 550 is selected, at least in part, to provide clearance for the relative rotation of sleeve body 542 and tension member 544.
Tension member 544 includes a cavity 560 that receives a portion of sleeve body 542 and fastener engagement feature, such as a threaded bore 562 that is engaged by fastener 520 in the assembled golf club 510. A portion of cavity 560 is shaped to complement the mating structure of sleeve body 542 (e.g., post 550 and ball 552). For example, a proximal portion of cavity 560 includes a mating surface 561 that is generally spherical to match the spherical outer surface of ball 552 and that portion of cavity 560 is sized so that ball 552 is able to rotate within cavity 560.
The proximal portion of tension member 544 that defines cavity 560 is preferably constructed with flexible members, such as a plurality of flexible arms 563, so that tension member 544 can be coupled to sleeve body 542 by deforming the flexible members and inserting ball 552 into cavity 560. As a result, the proximal portion of tension member 544 is generally constructed as a collet, but when assembled into the complete golf club 510, tension member 544 is used to pull the sleeve body 542 toward club head 512 rather than to tighten on ball 552.
Tension member 544 also includes a wedge member retainer 564 so that wedge member 518 is captured on the assembled shaft sleeve assembly 516. In the present embodiment, retainer 564 is a protrusion included on a distal portion of tension member 544 that effectively increases the diameter of tension member 544 so that wedge member 518 cannot slide past. Retainer 564 may be an integral part of tension member 544 or it may be a separate component coupled to tension member 544 such as a pin or a retaining ring like previous embodiments. Additionally, retainer 564 may be used as a key for aligning tension member 544 in hosel bore 536. The distal portion of tension member 544 includes a flat 565 that complements a truncated portion of hosel bore 536 adjacent and proximal of flange 540. The engagement of flat 565 with the truncated portion of the hosel bore 536 prevents rotation of tension member 544 relative to hosel 534. Hosel bore 536 includes a channel 576 that receives retainer 564 so that tension member 544 is keyed to the required orientation for flat 565 to engage the truncated portion of hosel bore 536. Preferably, channel 576 is aligned with the Z-axis so that the thickness is maintained on the toe-ward and heel-ward portions of hosel 534. As an alternative, the engagement of the wedge retainer and hosel bore channel may be used to prevent rotation of the tension member relative to the hosel bore, thereby obviating the need for the flat and truncated hosel bore.
Referring to
After ball 552 is slid through aperture 568, arms 563 flex back so that they wrap partially around ball 552, as shown in
A distal end of shaft 514 is inserted into tubular portion 546 of sleeve body 542 and coupled thereto, such as by using an adhesive such as epoxy. A ferrule 572 is also installed on shaft that provides a tapered transition between the outer surfaces of shaft 514 and sleeve body 542. Ferrule 572 also includes a distal portion that is received in a counterbore or countersink on sleeve body 542. Ferrule 572 is preferably constructed from a material that is more compressible than the material of sleeve body 542 so that when shaft 514 is bent, ferrule 572 provides a transitional bending radius where shaft 514 meets sleeve body 542 so that shaft 514 is less likely to break.
In the configuration illustrated in
In the assembled golf club 510, a shaft sub-assembly, including shaft 514, shaft sleeve assembly 516 and wedge member 518, is coupled to club head 512 with fastener 520. As shown in
An alternative assembly is illustrated in
Referring again to golf club 510, in the assembled club wedge member 518 is captured between hosel 534 and sleeve body 542 and creates a predetermined angular relationship between hosel 534 and sleeve body 542. Wedge member 518 is a tubular body that defines bore 566 that extends between proximal end surface 558 and a distal end surface 559. Both proximal end surface 558 and distal end surface 559 include a plurality of wedge alignment features, in the form of notches 556 and tangs 557. Notches 556 are shaped to complement tangs 548 of sleeve body 542 so that tangs 548 are received in notches 556 when sleeve body 542 and wedge member 518 abut. Similarly, tangs 557 of wedge member 518 are shaped to complements notches 538 of hosel 534 so that tangs 557 are received in notches 538 when wedge member 518 and hosel 534 abut, as shown in
When the shaft sub-assembly is coupled to club head 512 and fastener 520 is tightened, it forces sleeve body 542 into abutment with wedge member 518 and wedge member 518 into abutment with hosel 534. In particular, a distal end surface of tubular portion 546 of sleeve body 542 abuts the proximal end surface 558 of wedge member 518 and a distal end surface 559 of wedge member 518 abuts a proximal end surface 574 of hosel 534. Alternatively, the tangs and notches at each interface may be sized so that the abutting parts only contact on the tapered side surfaces of the tangs and notches. In the present embodiment, the end surfaces of wedge member 518 are oriented so that they are angled relative to each other by a wedge angle β having a pre-selected value that is preferably between about 0° and about 5°. As a result, when the parts abut, sleeve body 542 is retained at an orientation angled relative to hosel 534 that is defined by the orientation and wedge angle of wedge member 518. In the assembled golf club, the interaction between the alignment features (i.e., tangs and notches of the parts) prevents relative rotation between the golf club head and the shaft so that the interchangeable shaft system does not loosen during use.
It should be appreciated that the structure and orientation of wedge member 518 alters the orientation of shaft 514 relative to club head 512 in golf club 510. The orientation of shaft 514 relative to club head 512 can be further altered by providing shaft bore 554 of tubular portion 546 that is angled relative to the remainder of sleeve body 542 by shaft angle α, so that rotating sleeve body 542 relative to club head 512 alters the angular orientation of shaft 514 relative to club head 512.
In the present embodiment, the structure of the alignment features of hosel 534, wedge member 518, and sleeve body 542 result in wedge member 518 having two available positions relative to the hosel 534, and sleeve body 542 having two available positions relative to the wedge member 518. Those positions are oriented so that the shaft angle α and the wedge angle β are additive. In an embodiment, the components are constructed so that those angles are additive only in an X-Y plane of golf club 510 so that only a lie angle of golf club 510 is altered. The magnitudes of the shaft angle α, the wedge angle β, and the hosel end surface angle relative to a target lie angle are selected to provide either three or four discrete lie angles for golf club 510 using a single shaft sub-assembly (i.e., without being required to substitute any components).
Additionally, the alignment features are located so that they are generally aligned on a Z-axis of the golf club head that extends in a generally forward-aftward direction. As a result, the tangs and notches are generally aligned in the direction of impact of the ball striking surface 524 with a golf ball. That orientation is preferred so that the impact load traveling from the golf club head to the shaft is more equally distributed over the portions of the hosel, the wedge member and shaft sleeve adjacent the alignment features. For example, it was found that locating the alignment features along the X-axis may make the portions of the proximal end of the hosel between the hosel alignment features more prone to bending, for similar dimensions and materials.
The additive properties of the components of the present embodiment are illustrated in
An additional example is described in the following Table 1. Similar to the previously described example, the wedge member and sleeve body are configured so that the golf club head is adjustable in an X-Y plane so that the lie angle is adjustable without affecting other angular attributes of the golf club. Additionally, each of the sleeve body and the wedge member has two available positions relative to the club head. The magnitude of the wedge angle and the shaft angle are identical so that two configurations have the same resultant angle. In particular, the magnitude of each of the shaft angle and wedge angle is 1°, and the orientation of each of the sleeve body and wedge member determines whether the contribution of the 1° is positive or negative (i.e., upright or flat). The total angle for each available combination of sleeve body and wedge member is illustrated below. As illustrated by configurations B and C, although the configurations are different, the total resultant angle is identical, so the example provides three discrete angular positions including a target lie angle, 2° upright and 2° flat.
In another embodiment, the wedge member may be omitted so that the sleeve body couples directly to the hosel of the golf club head so that single angle adjustability is provided. In such an embodiment, a shaft is coupled to a golf club head through a shaft sleeve assembly similar to that previously described, but no wedge member is coupled to the shaft sleeve assembly. The shaft sleeve assembly includes a sleeve body and a tension member, and a fastener engages the tension member to draw the tension member into the hosel. However, as the tension member is drawn into the hosel, the sleeve body is forced to abut a proximal end surface of hosel instead of a wedge member.
As shown in
Indicia are preferably provided on club head 510 that indicate the orientation of the club head relative to the shaft. Referring to
Referring to
Another embodiment of a golf club including an interchangeable shaft system of the present invention will be described with reference to
Hosel 613 defines a hosel bore 615 and includes a plurality of hosel alignment features in the form of notches 626 that extend partially through a side wall of hosel 613 at a location spaced from a proximal end 628 of hosel 613. Preferably, the hosel alignment features are spaced from about 15.0 mm to about 20.0 mm from the proximal end of hosel 613, and more preferably from about 17.0 mm to about 18.0 mm. Hosel 613 also includes at least one window 630 extending entirely through a side wall of a proximal portion of hosel 613 so that indicia that are recessed within hosel 613 are visible by placing the golf club in a predetermined orientation. Window 630 may be a recessed portion of hosel, such as a channel as shown, or it may be an aperture, and window 630 may further include an insert constructed of transparent material if desired. As illustrated, indicia indicating the configuration of hosel are included on shaft sleeve 614 and wedge member 616 and preferably only those indicia indicating the precise configuration of golf club 600 are visible at any given time through window 630. Furthermore, those indicia are only visible when the heel side of hosel 613 is viewed. As a result, when golf club 600 is held at address, no indicia are visible to the user.
The interchangeable shaft system of the present embodiment is constructed so that the components (e.g., a shaft sleeve 614, a wedge member 616 and a retainer 618) are disposed closer to sole 610 than in previous embodiments. As a result, the mass of those components has less of a tendency to raise the center of gravity of the assembled golf club head. For example, in an embodiment, the components are lowered by about 20.5 mm, which results in the center of gravity of the completed golf club head being lowered by about 1.5 mm.
The interchangeable shaft system is generally constructed from shaft sleeve 614 that is coupled directly to shaft 604, wedge member 616 that is slidably received on shaft sleeve 614 and retainer 618 that is coupled to shaft sleeve 614 and sized so that wedge member 616 is retained on shaft sleeve 614. Shaft sleeve 614 includes a shaft bore 620 that has a longitudinal axis that is preferably not coaxial with the body of shaft sleeve 614 so that when shaft sleeve 614 is coupled to the distal end of shaft 604, the longitudinal axis of shaft sleeve 614 is angled relative to the longitudinal axis of shaft 604 by shaft angle α. Shaft sleeve includes a plurality sleeve alignment features, in the form of tangs 622, that extend outward from an outer surface of a distal portion of shaft sleeve 614.
The sleeve alignment features of the present embodiment are located on shaft sleeve 614 so that they are approximately in the center of length of shaft sleeve 614. Preferably, the sleeve alignment features are located from about 30% to about 60% of the length of shaft sleeve 614 from a proximal end of shaft sleeve 614, and more preferably from about 40% to about 50%. The location of sleeve alignment features is selected to provide a desired angular tilt of the top and bottom of the sleeve while permitting wedge member 616 to remain captured and to rotate on shaft sleeve 614. By locating the sleeve alignment features closer to the distal end of shaft sleeve 614 it places the pivot axis of shaft sleeve relative to club head 602 closer to sole 610, which reduces the clearance required for the distal end of shaft sleeve 614 and a fastener 624 to rotate during adjustment.
Wedge member 616 includes a tubular cylindrical body 632 that has generally planar end surfaces that are angled relative to each other by a wedge angle β so that the surfaces are non-parallel. In the assembled golf club 600, wedge alignment features disposed in a proximal end surface 634 of wedge member 616 engage the sleeve alignment features and wedge alignment feature disposed in a distal end surface of wedge member 616 engage the hosel alignment features. In particular, proximal end surface 634 includes a plurality of notches 638 that engage tangs 622 of shaft sleeve 614, and distal end surface 636 includes a plurality of tangs 640 that engage notches 626 of hosel 613. Tubular body 632 defines a bore 642 that is sized to slidably receive a distal portion of shaft sleeve 614 so that wedge member 616 can be positioned on shaft sleeve 614 in multiple selectable orientations with tangs 622 engaging notches 638.
Retainer 618 is coupled to a distal portion of shaft sleeve 614 and sized so that wedge member 616 is retained on shaft sleeve 614. For example, after the distal portion of shaft sleeve 614 is inserted in bore 642 of wedge member 616, retainer is coupled to the distal end of shaft sleeve 614. The outer diameter of retainer 618 is selected so that it is larger than the diameter of bore 642 so that wedge member 616 is captured on shaft sleeve 614 between retainer 618 and tangs 622. Preferably, retainer 618 is removably coupled to shaft sleeve 614, such as by a threaded interface.
Fastener 624 extends through a distal portion of hosel bore 615 and a flange 644, and engages a distal portion of shaft sleeve 614. As fastener 624 is tightened, shaft sleeve 614 is drawn into hosel 613 which causes shaft sleeve 614 to forcibly abut wedge member 616, which further causes wedge member 616 to forcibly abut a portion of hosel 613 that includes the hosel alignment features. Preferably, fastener 624 includes a head 625 that includes a curved bearing surface that interfaces a curved surface of a washer 648, as shown and as explained previously in greater detail and with reference to a previous embodiment.
A fastener retainer 646 is also preferably included so that when fastener 624 is disengaged from a shaft sleeve, the fastener is retained in club head 602. Retainer 646 is located on a shank of fastener 624 so that flange 644 is interposed between retainer 646 and the head of fastener 624. Retainer 646 is sized so that the threaded shank is prevented from sliding through an aperture of retainer 646 without the use of substantial force.
In another embodiment, shown in
Referring to
Hosel tube 672 is a tubular member that defines a hosel bore 674 that includes a proximal portion 676 that is sized and shaped to receive a shaft sleeve, a distal portion 678 that is shaped and sized to receive a fastener, and a flange 680 that is interposed between the proximal and distal portions. The proximal portion of hosel tube 672 includes mounting flange 682 that extends around the circumference of the tube and provides a surface that abuts a complementary crown/heel mounting surface of club head body 675. In the present embodiment, mounting flange 682 is constructed with an irregular shape so that it couples to a crown 671 of club head body 675 and in an approximate mid portion of the heel portion of club head body 675. Mounting flange 682 extends lower in the heel portion so that the proximal portion of hosel tube 672 may be constructed to define a window 684.
Hosel alignment features, in the form of notches 686, are provided in proximal portion 678 of hosel bore 674. The hosel alignment features are generally located adjacent window 684 and spaced longitudinally between the proximal end of hosel tube 672 and flange 680, and have a structure that is generally the same as the hosel alignment features of the hosel 613 of golf club head 602.
Hosel tube 672 generally extends between crown 671 and a sole 673 of golf club head 670 and is attached to golf club head body 675 at crown 671 and sole 673. In particular, hosel tube 672 is coupled to the crown/heel mounting surface at the proximal end and to a sole mounting flange 688 at the distal end. The crown/heel mounting surface provides an irregular shaped mounting surface to attach to mounting flange 682 as described above. Sole mounting flange 688 is a tubular portion of sole 673 that provides a cylindrical internal surface that abuts and is coupled to a cylindrical outer surface of the distal portion of hosel tube.
Referring to
Referring now to
In the present embodiment, a unitary shaft sleeve has been replaced by a shaft sleeve assembly 720 in golf club 600 and the structure and function of the remaining components remain unchanged. As such, the reference numerals used in common components also remain unchanged. Shaft sleeve assembly 720 includes a sleeve body 724, a shaft adapter 726 and a locking member 728. Sleeve body 724 is coupled to club head 602 by fastener 624. Sleeve body 724 includes sleeve alignment features (e.g., tangs 730) that engage wedge alignment features, (e.g., notches 638) in wedge member 616 in the assembled golf club. Sleeve body 724 includes an adapter bore 732 that is configured to receive a portion of shaft adapter 726 and to be coupled thereto.
Shaft adapter 726 includes a sleeve portion 734 and a projection portion 736. Sleeve portion 734 is a generally tubular portion that receives a distal end portion of a golf club shaft. The length and diameter of sleeve portion 734 are selected to provide adequate surface area to bond the shaft to the shaft adapter 726. Projection portion 736 extends from a distal end of sleeve portion 734 and is generally constructed as a threaded post that threadably engages adapter bore 732. Locking member 728 is a nut that is threaded onto projection portion 736 so that it is interposed between sleeve portion 734 and sleeve body 724.
The shaft of a golf club including shaft sleeve assembly 720 may be oriented as desired by rotating shaft adapter 726 within sleeve body 724. Next, locking member 728 is tightened against sleeve body 724 while holding shaft adapter 726 in the desired orientation. The tightened locking member 728 prevents shaft adapter 726 from rotating relative to sleeve body 724 so that the shaft is locked into a specific orientation.
Despite the benefits of the weight reduction, it should be noted that creating an opening 633 from the hosel bore 615 into the internal cavity comes with its own challenges. In one example it can be seen that by opening the internal cavity of the golf club head to the hosel bore 615, there could be potential for dirt and debris to contaminate the internal components of the golf club head. In addition to the obvious issue of contamination, a closer examination of the components (e.g., a shaft sleeve 614, a wedge member 616, and a retainer 618) will clearly show that some of these components could become loose if the retainer at the top of the bottom hosel bore becomes loose. (See
In addition to using the retainer 177 to help retain the screw,
Although the present invention believes the cross-sectional view of the golf club head provided in
While it is apparent that the illustrative embodiments of the invention disclosed herein fulfill the objectives stated above, it is appreciated that numerous modifications and other embodiments may be devised by those skilled in the art. Elements from one embodiment can be incorporated into other embodiments. Therefore, it will be understood that the appended claims are intended to cover all such modifications and embodiments, which would come within the spirit and scope of the present invention.
This application is a continuation-in-part of U.S. patent application Ser. No. 14/278,027, filed on May 15, 2014, currently pending, which is a divisional of U.S. patent application Ser. No. 13/209,318, filed Aug. 12, 2011, now U.S. Pat. No. 8,727,905, which is a continuation-in-part of U.S. patent application Ser. No. 12/560,931, filed Sep. 16, 2009, now U.S. Pat. No. 7,997,997, which is a continuation-in-part of U.S. patent application Ser. No. 11/958,412, filed Dec. 18, 2007, now U.S. Pat. No. 7,878,921 and a continuation-in-part of U.S. patent application Ser. No. 12/493,517, filed Jun. 29, 2009, now U.S. Pat. No. 8,235,834, which is a continuation-in-part of U.S. patent application Ser. No. 12/336,748, filed Dec. 17, 2008, now U.S. Pat. No. 7,874,934, which is a continuation-in-part of U.S. patent application Ser. No. 12/023,402, filed Jan. 31, 2008, now U.S. Pat. No. 7,699,717, the contents of which are incorporated in their entireties by reference herein.
Number | Date | Country | |
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Parent | 13209318 | Aug 2011 | US |
Child | 14278027 | US |
Number | Date | Country | |
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Parent | 14278027 | May 2014 | US |
Child | 14926411 | US | |
Parent | 12560931 | Sep 2009 | US |
Child | 13209318 | US | |
Parent | 11958412 | Dec 2007 | US |
Child | 12560931 | US | |
Parent | 12493517 | Jun 2009 | US |
Child | 11958412 | US | |
Parent | 12336748 | Dec 2008 | US |
Child | 12493517 | US | |
Parent | 12023402 | Jan 2008 | US |
Child | 12336748 | US |