Aspects of this invention relate generally to golf clubs and golf club heads, and, in particular, to golf clubs and golf club heads having a portion of the club head removed or open, thereby creating a void in the club head, in order to reduce or redistribute weight associated with the club head to enhance performance.
Golf is enjoyed by a wide variety of players, players of different genders and players of dramatically different ages and/or skill levels. Golf club designers have successfully advanced the technology incorporated in golf clubs in response to the constant demand of golfers for improved performance. In one aspect, golfers tend to be sensitive to the “feel” of a golf club. The “feel” of a golf club comprises the combination of various component parts of the club and various features associated with the club that produce the sensations experienced by the player when a ball is swung at and/or struck. Club weight, weight distribution, swing weight, aerodynamics, swing speed, and the like all may affect the “feel” of the club as it swings and strikes a ball. “Feel” also has been found to be related to the sound produced when a club head strikes a ball to send the ball in motion. If a club head makes an unpleasant, undesirable, or surprising sound at impact, a user may flinch, give up on his/her swing, decelerate the swing, lose his/her grip, and/or not completely follow-through on the swing, thereby affecting distance, direction, and/or other performance aspects of the swing and the resulting ball motion. User anticipation of this unpleasant, undesirable, or surprising sound can affect a swing even before the ball is hit.
Also, the performance of a golf club can vary based on several factors, including weight distribution about the club head, which affects the location of the center of gravity of the golf club head. When the center of gravity is positioned behind the point of engagement on the contact surface, the golf ball follows a generally straight route. When the center of gravity is spaced to a side of the point of engagement, however, the golf ball may fly in an unintended direction and/or may follow a route that curves left or right, including ball flights that often are referred to as “pulls,” “pushes,” “draws,” “fades,” “hooks,” or “slices.” Similarly, when the center of gravity is spaced above or below the point of engagement, the flight of the golf ball may exhibit more boring or climbing trajectories, respectively.
Weight distribution about the club head can also affect moment of inertia associated with the club head. Thus, altering the moment of inertia can affect how the golf club performs including how the golf club head design impacts heel and toe mishits. Similarly, other factors such as point of impact and launch angle can also affect how the ball travels once it has been struck.
Club designers are often looking for new ways to distribute or redistribute weight associated with a golf club and/or golf club head. For instance, club designers are often looking to distribute weight to provide more forgiveness in a club head, improved accuracy, a desired ball flight and the like. In pursuit of such designs, club designers also face a challenge of maintaining a club head having a traditional aesthetic look desired by most golfers. While certain golf club and golf club head designs according to the prior art provide a number of advantageous features, they nevertheless have certain limitations. Accordingly, it would be advantageous to provide a golf club and golf club head having a reduced weight characteristic and improved weight distribution throughout the club head to enhance club performance. The present invention is provided to overcome certain of the limitations and drawbacks of the prior art, and to provide new features not heretofore available.
At least some aspects of the disclosure relate to golf clubs and golf club heads having enhanced weight distribution about the club head. In one aspect, the golf club utilizes a geometric weight feature in the form of a void formed in the golf club head. The golf club head may include a cover extending over the void such that the void may not be visible from a top of the golf club head at an address position. The golf club head may further include one or more adjustable weight arrangements.
Aspects of the invention relate to a golf club head that includes a body having a ball striking face, a rear opposite the ball striking face, a crown, a sole, a heel, and a toe. The body has a void defined by a peripheral edge on the sole, and the body further defines a cover that extends over the void and forms at least a portion of the crown. At least a portion of the peripheral edge of the void includes a lip extending from the peripheral edge inwardly into the void. The lip may extend around the entire peripheral edge, or may only extend around portions of the peripheral edge.
According to one aspect, the head includes a weight receptacle connected to the sole and having an opening in the sole, such that the weight receptacle is configured to receive insertion of a weight through the opening. The weight receptacle may be a receiving tube connected to an underside of the crown and an upper side of the sole and extending from the crown to the sole. A weight may be received in the receiving tube, and the weight may have a heavier portion and a lighter portion. In this configuration, the weight is removable and insertable in the receiving tube in multiple positions to adjust weighting characteristics of the head. The receiving tube may contain threading proximate the opening, and a threaded fastener may be provided to be releasably engaged with the threading in the receiving tube to retain the weight in the receiving tube. The sole may also have a recessed area that is recessed inwardly with respect to adjacent areas of the sole, and wherein the recessed area surrounds the opening.
According to another aspect, the head may include at least one wall extending from the top to the sole and from the heel to the toe of the body to define a completely enclosed interior cavity between the at least one wall and the face, such that the wall(s) separate the void from the interior cavity. In a head with a weight receptacle, the head may include a first wall extending from the top to the sole and extending from the weight receptacle to the toe of the body and a second wall extending from the top to the sole and extending from the weight receptacle to the heel of the body. The first and second walls define the completely enclosed interior cavity between the first and second walls and the face, and first and second walls separate the void from the interior cavity.
According to a further aspect, the peripheral edge defines the void in a U-shaped configuration, having a heel portion and a toe portion extending from proximate the rear of the body toward the face, and a connecting portion that connects the heel portion and the toe portion proximate the rear of the body. The void defines a peninsula on the sole extending rearwardly from a point proximate the face, such that the heel portion and the toe portion are positioned on opposite sides of the peninsula. The lip may extend at least around the entire peninsula.
Additional aspects of the invention relate to a golf club head that includes a body having a ball striking face, a rear opposite the ball striking face, a crown, a sole, a heel, and a toe, and a weight receptacle connected to the sole and having an opening in the sole, such that the weight receptacle is configured to receive insertion of a weight through the opening. The body has a void defined by a peripheral edge on the sole, and the body further defines a cover that extends over the void and forms at least a portion of the crown. The weight receptacle is a receiving tube connected to an underside of the crown and an upper side of the sole and extending from the crown to the sole, where at least a portion of an exterior surface of the receiving tube is exposed to the void. The head may further contain any aspects and features described above, including a lip extending around at least a portion of the void.
According to one aspect, a weight may be received in the receiving tube, and the weight may have a heavier portion and a lighter portion. In this configuration, the weight is removable and insertable in the receiving tube in multiple positions to adjust weighting characteristics of the head. The receiving tube may include threading proximate the opening, and a threaded fastener may be provided to be is releasably engaged with the threading in the receiving tube to retain the weight in the receiving tube.
According to another aspect, a first wall extends from the top to the sole and extends from the receiving tube to the toe of the body, and a second wall extends from the top to the sole and extends from the receiving tube to the heel of the body. The first and second walls define a completely enclosed interior cavity between the first and second walls and the face, and the first and second walls separate the void from the interior cavity.
According to a further aspect, the receiving tube may be aligned with a vertical axis of the golf club head or may alternately be angled with respect to a vertical axis of the golf club head.
According to yet another aspect, the head also includes a second weight receptacle connected to the sole and having a second opening in the sole, such that the second weight receptacle is configured to receive insertion of a second weight through the second opening. The second weight receptacle is a second receiving tube connected to the underside of the crown and the upper side of the sole and extending from the crown to the sole. The first and second weight receptacles are oriented at an oblique angle to each other. Weights may be received in each receiving tube, and each weight may have a heavier portion and a lighter portion, where the weights are removable and insertable in multiple positions in the respective receiving tubes to adjust weighting characteristics of the head.
Further aspects of the invention relate to a golf club head that includes a body having a ball striking face, a rear opposite the ball striking face, a crown, a sole, a heel, a toe, and an interface area proximate a central region of the body, a first weight receptacle connected to the sole and having a first opening in the sole proximate the interface area, and a second weight receptacle connected to the sole and having a second opening in the sole proximate the interface area. The body further has a first leg extending away from the interface area toward the rear and the heel and a second leg extending away from the interface area toward the rear and the toe, wherein a void is defined between the first leg and the second leg. The first weight receptacle is configured to receive insertion of a first weight through the first opening, and the first weight receptacle extends from the first opening toward the rear and the heel along the first leg. The second weight receptacle is configured to receive insertion of a second weight through the second opening, and the second weight receptacle extends from the second opening toward the rear and the heel along the second leg. Each weight receptacle may be a cylindrical receiving tube. The head may further contain any aspects and features described above.
According to one aspect, cylindrical weights are received in each receptacle. Each weight may have a heavier portion and a lighter portion, such that the weights are removable and insertable in multiple positions in the respective receptacles to adjust weighting characteristics of the head. Each receptacle may have threading proximate the opening, and threaded fasteners may be releasably engaged with the threading in to retain the weights in the receptacles.
According to another aspect, the body may further include a first recessed area on the first leg that is recessed inwardly with respect to adjacent areas of the sole, where the first recessed area surrounds the first opening, as well as a second recessed area on the second leg that is recessed inwardly with respect to adjacent areas of the sole, where the second recessed area surrounds the second opening. The body may also have a flattened keel on the sole at the interface area. The interface area may further include a sloping planar central surface located between the two legs and extending inwardly from the sole to an underside of the crown and two sloping planar side surfaces located on opposed sides of the central surface and oriented at obtuse angles to the central surface, where the side surfaces extend inwardly from the keel to the first and second recessed areas.
Still further aspects of the invention relate to a golf club head that includes a body having a ball striking face, a rear opposite the ball striking face, a crown, a sole, a heel, and a toe, a first weight receptacle connected to the sole and having a first opening in the sole proximate a central region of the body, a second weight receptacle connected to the sole and having a second opening proximate the rear of the body. The first weight receptacle is configured to receive insertion of a first weight through the first opening, and the first weight receptacle is a first receiving tube connected to the sole and extending inwardly from the sole toward the crown. The second weight receptacle is configured to receive insertion of a second weight through the second opening, and the second weight receptacle is a second receiving tube connected to the sole and extending forwardly from the rear of the body toward the face. The head may further contain any aspects and features described above.
According to one aspect, the body also includes an interface area proximate the central region of the body, where the first receiving tube is located at the interface area. The body may further have a first leg extending away from the interface area toward the rear and the heel and a second leg extending away from the interface area toward the rear and the toe, where a void is defined between the first leg and the second leg. In this configuration, the second receiving tube may extend rearwardly from the interface area between the first and second legs. Further, the body may include a rear rim that extends between the legs and around a portion of the rear of the body, such that the rear rim combines with the legs and the interface area to define the void. In this configuration, the rear rim may support and suspend an open end of the second receiving tube and the interface area may support and suspend a closed end of the second receiving tube, such that the second receiving tube is suspended within the void.
According to one aspect, cylindrical weights are received in each receptacle. Each weight may have a heavier portion and a lighter portion, such that the weights are removable and insertable in multiple positions in the respective receptacles to adjust weighting characteristics of the head. Each receptacle may have threading proximate the opening, and threaded fasteners may be releasably engaged with the threading in to retain the weights in the receptacles. The weight in the first receptacle may be configured for adjusting the weighting characteristics of the club head in a crown-sole direction, and the weight in the second receptacle may be configured for adjusting the weighting characteristics of the club head in a front-rear direction. Each tube may have threading proximate the opening, and threaded fasteners may be releasably engaged with the threading in to retain the weights in the receptacles.
According to another aspect, the first receiving tube has a first axis and the second receiving tube has a second axis, and the first and second axes are perpendicular.
Other aspects of the invention relate to a golf club that includes a golf club head as described above and a shaft connected to the golf club head.
These and additional features and advantages disclosed here will be further understood from the following detailed disclosure of certain embodiments.
To allow for a more full understanding of the present invention, it will now be described by way of example, with reference to the accompanying drawings in which:
The figures referred to above are not drawn necessarily to scale, should be understood to provide a representation of particular embodiments of the invention, and are merely conceptual in nature and illustrative of the principles involved. Some features of the golf club and golf club head structures depicted in the drawings have been enlarged or distorted relative to others to facilitate explanation and understanding. In certain instances, the same reference numbers are used in the drawings for similar or identical components and features shown in various alternative embodiments. Golf clubs and golf club head structures as described herein may have configurations and components determined, in part, by the intended application and environment in which they are used.
In the following description of various example structures in accordance with the invention, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various example articles, including one or more golf club or golf club head structures. Additionally, it is to be understood that other specific arrangements of parts and structures may be utilized and structural and functional modifications may be made without departing from the scope of the present invention. Also, while the terms “top,” “bottom,” “front,” “back,” “rear,” “side,” “underside,” “overhead,” and the like may be used in this specification to describe various example features and elements of the invention, these terms are used herein as a matter of convenience, e.g., based on the example orientations shown in the figures and/or the orientations in typical use. Nothing in this specification should be construed as requiring a specific three dimensional or spatial orientation of structures in order to fall within the scope of this invention. Further, the invention generally will be described as it relates to wood-type golf clubs. In particular, the club heads disclosed herein will be drivers and fairway woods in exemplary embodiments. However, aspects of the invention may be used with any of several types of golf clubs, including hybrid type golf clubs, utility clubs, putters, and the like and nothing in the specification or figures should be construed to limit the invention to use with the wood-type golf clubs described.
The shaft 106 may be received in, engaged with, and/or attached to the club head 102 in any suitable or desired manner, including in conventional manners known and used in the art, without departing from the invention. As more specific examples, the shaft 106 may be engaged with the club head 102 via the hosel 104 and/or directly to the club head structure 102, e.g., via adhesives, cements, welding, soldering, mechanical connectors (such as threads, retaining elements, or the like) and further including releasable adjustable members or connectors, etc.; through a shaft-receiving sleeve or element extending into the body of the club head 102; etc. The shaft 106 also may be made from any suitable or desired materials, including conventional materials known and used in the art, such as graphite based materials, composite or other non-metal materials, steel materials (including stainless steel), aluminum materials, other metal alloy materials, polymeric materials, combinations of various materials, and the like. Also, the grip or handle 108 may be attached to, engaged with, and/or extend from the shaft 106 in any suitable or desired manner, including in conventional manners known and used in the art, e.g., using adhesives or cements; via welding, soldering, adhesives, or the like; via mechanical connectors (such as threads, retaining elements, etc.); etc. As another example, if desired, the grip or handle 108 may be integrally formed as a unitary, one-piece construction with the shaft 106. Additionally, any desired grip or handle 108 materials may be used without departing from this invention, including, for example: rubber materials, leather materials, rubber or other materials including cord or other fabric material embedded therein, polymeric materials, and the like.
The club head 102 itself also may be constructed in any suitable or desired manner and/or from any suitable or desired materials without departing from this invention, including from conventional materials and/or in conventional manners known and used in the art. For example, in the example club head 102 shown in
A wide variety of overall club head constructions are possible without departing from this invention. For example, if desired, some or all of the various individual parts of the club head 102 described above may be made from multiple pieces that are connected together (e.g., by welding, adhesives, or other fusing techniques; by mechanical connectors; etc.). The various parts (e.g., crown, sole, front face, rear, etc.) may be made from any desired materials and combinations of different materials, including materials that are conventionally known and used in the art, such as metal materials, including lightweight metal materials, and the like. More specific examples of suitable lightweight metal materials include steel, titanium and titanium alloys, aluminum and aluminum alloys, magnesium and magnesium alloys, etc. Additionally or alternatively, the various parts of the club head may be formed of one or more composite materials. Injection molded parts are also possible. The club head 102 also may be made by forging, casting, or other desired processes, including club head forming processes as are conventionally known and used in the art. The golf club head 102 could further be formed in a single integral piece.
The various individual parts that make up a club head structure 102, if made from multiple pieces, may be engaged with one another and/or held together in any suitable or desired manner, including in conventional manners known and used in the art. For example, the various parts of the club head structure 102, such as the front face 102a, ball striking surface 102b, the top 102c, the sole 102d, etc., may be joined and/or fixed together (directly or indirectly through intermediate members) by adhesives, cements, welding, soldering, or other bonding or finishing techniques; by mechanical connectors (such as threads, screws, nuts, bolts, or other connectors); and the like. If desired, the mating edges of various parts of the club head structure 102 may include one or more raised ribs, tabs, ledges, or other engagement elements that fit into or onto corresponding grooves, slots, surfaces, ledges, openings, or other structures provided in or on the facing side edge to which it is joined. Cements, adhesives, mechanical connectors, finishing material, or the like may be used in combination with the raised rib/groove/ledge/edge or other connecting structures described above to further help secure the various parts of the club head structure 102 together.
The dimensions and/or other characteristics of a golf club head structure according to examples of this invention may vary significantly without departing from the invention, and the dimensions may be consistent with those commonly used in the art for similar club heads and clubs.
Several embodiments of golf club heads are disclosed herein. It is understood that the description of the club head and various components described above regarding
As further shown in
The void 230 extends inwardly from an opening 236 in the body 202, which is defined by a peripheral edge 238. In the embodiment shown in
The opening 236 to the void 230 (and the edge 238 defining the opening 236) has a generally U-shaped configuration in the embodiments of
In some example embodiments, the golf club head 200 may be formed as a single piece that includes the body 202 with a cover 250 forming at least part of the crown 214 of the head 200. For instance, the front 210 (including the face 211), rear 212, crown 214, toe 216, heel 218 and sole 215 may be a single piece unit. In another embodiment, the face 211 may be formed of a separate structure from the body 202, such as, e.g., a face plate or cup face structure. The body 202 may be formed of a single piece or multiple pieces in this embodiment. The golf club head 200 and/or metallic components thereof may be formed using known methods of manufacture, such as casting, molding, forging, etc., and various combinations thereof. Thus, in one example, the golf club head body 202 may be cast in a metal material such as titanium. The weight receiver 242, as described below, may be formed together with one or more other components of the body 202 or may be formed separately and attached to the body 202, in various embodiments. The void 230 may be formed in the golf club head during the initial manufacturing process of the golf club head (e.g., during casting) or may be formed into the golf club head 200 using an additional process (e.g., by cutting).
As mentioned above, and as shown in
In the embodiments of
The head 200 may further include stiffening or strengthening structures, such as to influence one or more properties of the head 202, such as vibrational properties, acoustic properties, impact response properties, etc., and/or to increase the durability and structural stability of the head 200. In the embodiments of
In one embodiment, the head 200 has an additional stiffening or strengthening structure in the form of a wall or walls 232 that extend inwardly from the crown 214 and/or the sole 215. In the embodiment of
The golf club head 200 may utilize a weight assembly to further enhance performance of the club head 200. In an exemplary embodiment, the head 200 includes a receptacle or receiver 242, which may be in the form of a receiving tube 242, as in the embodiments of
In the embodiments illustrated in
The receiving tube 242 and weight 240 may have corresponding shapes such that the weight 240 may slide into the receiving tube 242. In some examples, the weight 240 and receiving tube 242 may be cylindrical, square, rectangular, etc. The receiving tube 242 may have a longitudinal axis and the weight may have a longitudinal axis, and the longitudinal axes may generally correspond when the weight 240 is received in the tube 242. In the embodiment shown in
The receiving tube 242 may receive the weight 240, which may be a single weighted member or may have portions with different weighting characteristics or weight values, which can allow for differing weighting characteristics and arrangements to alter the performance characteristics of the club head 200. For instance, the weight 240 may have one end 240a that is heavier than an opposite end 240b wherein the weight 240 can be flipped as desired. Such differing weights may be achieved by use of different materials and/or by using weight-doping materials (e.g. tungsten) in different concentrations. Additionally, a weight 240 that is differentially-weighted may be a combination of smaller weights that may be permanently or releasably connected together. In some arrangements, the heavier end 240a may be positioned towards the crown 214 of the golf club head 200 to provide a first weight arrangement with a relatively higher center of gravity (CG) or alternatively, towards the sole 215 of the golf club head 200 to provide a second weight arrangement with a relatively lower CG. The different weight arrangements can affect performance of the club head 200. The weight 240 may have more than two differently-weighted portions in another embodiment. In further embodiments, different and/or additional structures can be operably associated with the head 200 to removably support weight members thereon. In the various embodiments described herein, the weight members 240 may be made of a material heavier than the remainder of the golf club head 200 or portions of the head. In other exemplary embodiments, the weight member(s) 240 may be made of the same material as the remainder of the golf club head 200 or portions thereof. In certain exemplary embodiments, the weight member may be formed from steel, aluminum, titanium, magnesium, tungsten, graphite, polymers, or composite materials, as well as alloys and/or combinations thereof.
Additionally or alternatively, the weight member 240 may include multiple weights or portions of the weight 240 that can be received within the weight receptacle 242 in different arrangements to achieve different weighting characteristics; e.g. three pieces with one piece being heaviest. Such multiple weights can be releasably fastened to one another in one embodiment. The different weights may also have different weight values. In some examples, the heaviest member can be at either end or at a middle of the member. Various other combinations of weight members may be used without departing from the invention. The overall height of the weight member 240 along with the length of the threaded fastener 244 may generally correspond to the height of the receiving tube 242 so that the weight 240 fits snugly in the tube 242 and does not slide within the tube during use. It is understood that the threading in the receiving tube 242 may be configured such that the fastener 244 may be threaded different distances into the receiving tube 242 to engage and secure weights 240 having different lengths within the receiving tube 242. Additionally, the tube 242 and/or the weight 240 may have shock absorbing features if desired, and that plugs or fillers may be inserted into the receiving tube 242 to ensure a snug fit for a weight 240 that has a shorter length than the receiving tube.
The position of the weight 240 and receiving tube 242 proximate the geometric center of the club head 200 may aid in adjusting the center of gravity near a central region of the golf club head 200. Weight in the tube 242 can be focused in the tube 242 to provide a low center of gravity or a high center of gravity. The weight 240 can also be configured to provide a more neutral center of gravity. The insertion or removal of weight 240 may add or remove additional weight from the overall weight of the golf club head 200 and may add or remove weight from the central region, thereby adjusting the performance characteristics of the golf club head 200. Thus, different interchangeable weights 240 can be selected to increase or decrease the overall weight of the club head 200. Such weighting characteristics provided by the weight 240 in the tube 242 can further impact golf ball trajectory by providing a change in ball spin. It has been determined that this weighting feature can provide a change of approximately 500-600 rpm in ball spin. Utilizing the adjustable weight 240 in the tube 242 to affect ball spin as well as considering launch angle and ball speed, a golfer can customize the golf club to achieve desired ball trajectory, distance and other characteristics. The adjustable weighting feature can further be used to customize the club head 200 to produce a desired ball spin for a particular golf ball being used.
As further shown in
As illustrated in
In some arrangements, the receiving tube 242 may be angled with respect to the face 211, the sole 215, and/or the vertical axis of the club head 200 when in a playing position. As described herein, the “vertical axis” extends along a line perpendicular to a flat playing surface when the club head 200 is in a playing position, with the axis of the hosel 104 in a vertical plane and with the face 211 set to the desired loft angle specified for the club head 200. Thus, the weight member may be adjusted in a hybrid fashion, e.g., both high/low and fore/aft, by adjusting the weight 240 within such an angled receiving tube 242. In one embodiment, the axis of the receiving tube 242 may be between 0-60° from the vertical axis. In other embodiments, the axis of the receiving tube 242 may be between 0-50° or 20-50° from the vertical axis. In the embodiment illustrated in
Other embodiments described herein illustrate different orientations of the receiving tube 242 with respect to the vertical axis. In another embodiment, illustrated in
As further shown in
The golf club head 300 includes two weight members 340a and 340b that are received in two weight receivers 342a, 342b. In the embodiment illustrated in
The weights 340a,b may be similar to the weights shown in
As further shown in
The weight arrangement shown includes two adjustable weights 440a, 440b, that are received in a first receiver or receptacle 442a and a second receiver or receptacle 442b, respectively. Similar to the arrangements described above, the adjustable weights 440a, 440b may have ends or portions that are weighted differently and may also be made from multiple weight members releasably connected together and having various weight values. In an exemplary embodiment, the first receiver is a first receiving tube 442a, and the second receiver is a second receiving tube 442b. The first receiving tube 442a has a vertical configuration positioned proximate the interface area 426 at a central location on the body 402, extending inwardly into the body 402 from an opening 443a at the sole 415. The second receiving tube 442b has a general horizontal configuration and extends from proximate the first receiving tube 442a and the interface area 426 towards the rear 412 of the club head 400. An end of the second receiving tube 442b is connected at the rear periphery of the club head 400. While two weights are being shown, it is understood that more or fewer weights may be used as desired. The first receiving tube 442a may be arranged at the base of the v-shaped void 430, and as shown in
In the embodiment of
Similar to certain arrangements discussed above, the weights 440a, 440b are contained within the receiving tubes 442a, 442b in the golf club head 400. In some examples, the position of the weight 440a, 440b within the receiving tube may be maintained by fasteners 444, such as a screw or other threaded fastener. The receiving tubes may be visible, such as the second receiving tube 442b or may be contained within a portion of the golf club head 400 such that it is not visible from an exterior of the club, such as the first receiving tube 442a.
The weights 440a, 440b may be rotatable, removable, adjustable, etc. to adjust the performance characteristics of the golf club head. For example, adjustment of the second weight 440b may adjust the weight distribution and CG of the golf club head 400 in a front to rear direction. That is, positioning a heavier end of the second weight 440b near interface area 426 will adjust the overall weight and CG of the club head 400 toward a front 410 or face 411 of the golf club head 402. Alternatively, positioning a heavier end of the second weight 440b toward the rear 412 of the golf club head 400 may shift the overall weight and CG of the club head 400 toward the back or rear 412 of the golf club head 400.
The first weight 440a may also be adjustable, removable, rotatable, etc. to adjust the overall weight characteristics of the golf club head 400. For instance, adjustment of the first weight 440a may adjust the weight distribution and CG of the golf club head 400 in a high to low direction. That is, inserting the heavier end in first (i.e., positioning the heavier end toward the crown 414 since the first receiving tube 442a is accessed from the sole 415 of the golf club head 400) may adjust the overall weight and CG toward the crown 414 of the golf club head 400. Alternatively, inserting the lighter end in first (i.e., toward the crown 414) will adjust the overall weight and CG toward the bottom or sole 415 of the golf club head 400.
The weights 440a, 440b may be adjusted independently of each other. As described above, adjustment, rotation, etc. of the weights 440a, 440b may move or adjust the center of gravity of the golf club head 400 as desired. The hybrid arrangement of adjusting weight in both a fore/aft direction and high/low or sole/crown direction may provide for further customization of the weighting and/or performance characteristics of the golf club head 400. It is also understood that the receiving tubes 442a, 442b could be supported by pivotable supports providing further adjustment capabilities. It is further understood that the receivers or receptacles 442a, 442b have generally longitudinal axes, and the weights 440a, 440b are received along the longitudinal axes. In the embodiment of
Several different embodiments of the golf club head of the present invention have been described herein. The various embodiments have several different features and structures providing benefits and enhanced performance characteristics. It is understood that any of the various features and structures may be combined to form a particular club head of the present invention.
The structures of the golf club heads disclosed herein provide several benefits. The unique geometry of the golf club head provides for beneficial changes in mass properties of the golf club head. The geometric weighting features provide for reduced weight and/or improved weight redistribution. The void defined in the club head can reduce overall weight as material is removed from a conventional golf club head wherein a void is defined in place of such material that would normally be present. The void also aids in strategically distributing weight throughout the club head to order to provide improved performance characteristics. The void provides for distributing weight to the rear corners of the club head, at the toe and the heel. Increases in moment of inertia have been achieved while optimizing the location of the center of gravity of the club head. This can provide a more forgiving golf club head as well as a golf club head that can provide more easily lofted golf shots. In certain exemplary embodiments, the weight associated with the portion of the golf club head removed to form the void may be approximately 4-15 grams and more particularly, 8-9 grams. In other exemplary embodiments, this weight savings may be redistributed to other areas of the club head such as towards the rear at the toe and the heel. In certain exemplary embodiments, approximately 2% to 7.5% of the weight is redistributed from a more traditional golf club head design. In still further examples, the void may be considered to have a volume defined by an imaginary plane extending from the sole surfaces and rear of the club and to cooperate with the side surfaces of the legs and underside portion of the cover. The internal cavity may also have a certain volume. The volumes are dimensioned to influence desired performance characteristics. It is further understood that certain portions of the club head can be formed from alternative materials to provide for weight savings or other weight redistribution. In one exemplary embodiment, the walls defining the void may be made from other materials such as composites or polymer based materials.
As discussed, the weight can be redistributed to more desired locations of the club head for enhanced performance. For example, with the centrally-located void and the legs extending outwardly towards the rear on the heel side and the toe side, more weight is located at such areas. This provides more desired moment of inertia properties. In the designs described herein, the moment of inertia (MOI) about a vertical axis (z-axis) through the center of gravity of the club head (Izz) can range from approximately 1500 gm-cm2 to 5900 gm-cm2 depending on the type of golf club. In an exemplary embodiment for a driver type golf club, the moment of inertia about a vertical axis (z-axis) through the center of gravity of the club head (Izz) can range from approximately 3800 gm-cm2 to 5900 gm-cm2, and in a further exemplary embodiment, the Izz moment of inertia can range from 4300 gm-cm2 to 5200 gm-cm2. In an exemplary embodiment of a fairway wood type golf club, the moment of inertia about a vertical axis (z-axis) through the center of gravity of the club head (Izz) can range from approximately 2000 gm-cm2 to 3500 gm-cm2, and in a further exemplary embodiment, the Izz moment of inertia can range from 2200 gm-cm2 to 3000 gm-cm2. In an exemplary embodiment of a hybrid type golf club, the moment of inertia about a vertical axis (z-axis) through the center of gravity of the club head (Izz) can range from approximately 2000 gm-cm2 to 3500 gm-cm2, and in a further exemplary embodiment, the Izz moment of inertia can range from 2200 gm-cm2 to 3000 gm-cm2, and in a further exemplary embodiment, the Izz moment of inertial can range from 1800 gm-cm2 to 2800 gm-cm2. In a particular embodiment utilizing the adjustable connection mechanism in the hosel, the Izz moment of inertia is approximately 4400 gm-cm2 to 4700 gm-cm2. These values can vary. With such moment of inertia properties, improved ball distance can be achieved on center hits. Also, with such moment of inertia properties, the club head has more resistance to twisting on off-center hits wherein less distance is lost and tighter ball dispersion is still achieved. Thus, a more forgiving club head design is achieved. As a result, golfers can feel more confident with increasing their golf club swing speed.
In addition, the center of gravity of the club head can be positioned at a location to enhance performance, through strategic weighting as described herein. In the structures of the exemplary embodiments of the golf club head, the center of gravity is positioned outside of the void location of the club head, and inside the internal cavity or internal volume of the club head. In certain exemplary embodiments, the center of gravity is located between an inner surface of the ball striking face and an inner surface of the base support wall, or within the internal cavity.
In addition, the geometry and structure of the golf club head provides enhanced sound characteristics. In certain embodiments, the first natural frequency of the golf club head, other than the six rigid body modes of the golf club head, may be in the range of 2750-3200 Hz. In additional exemplary embodiments, the first natural frequency of the golf club head may be at least 3000 Hz. It has been found that golf club head structures providing such a frequency of less than 2500 Hz can tend to be displeasing to the user by providing undesirable feel including sound and/or tactical feedback. The structures provided herein provide for increased frequencies at more desirable levels.
In addition, the moveable weight mechanisms employed herein provide additional options for distributing weight providing further adjustability of moment of inertia and center of gravity properties. For example, embodiments described herein providing weights that can be further moved towards the rear of the club head at the heel and toe can provide more easily lofted golf shots. Weights can also be more towards the front of the club head to provide more boring shots, such as those desired in higher wind conditions. Weights can also be positioned more towards a crown or sole and/or a heel or toe of the golf club head in certain embodiments. Such moveable weighting features provide additional customization.
Finally, adjustable connection mechanisms can be used with the club heads to provide club head adjustability regarding face angle, loft angle and/or lie angle. The access opening as described above may provide access to such connecting structure or mechanisms. A further embodiment utilizing the adjustable connection mechanism described above allows the golfer to adjust parameters of the golf club such as loft angle of the golf club. Certain golfers desire a lower loft angle setting such as but not limited to 7.5 degrees, 8 degrees, or 8.5 degrees or even 9 degrees. Such low loft angle settings may provide lower ball spin at ball impact. The moveable weight mechanisms, such as shown in
Thus, while there have been shown, described, and pointed out fundamental novel features of various embodiments, it will be understood that various omissions, substitutions, and changes in the form and details of the devices illustrated, and in their operation, may be made by those skilled in the art without departing from the spirit and scope of the invention. For example, it is expressly intended that all combinations of those elements and/or steps which perform substantially the same function, in substantially the same way, to achieve the same results are within the scope of the invention. Substitutions of elements from one described embodiment to another are also fully intended and contemplated. It is the intention, therefore, to be limited only as indicated by the scope of the claims appended hereto.
This is a continuation of U.S. patent application Ser. No. 16/377,067 filed Apr. 5, 2019, which is a continuation of U.S. patent application Ser. No. 15/723,381 filed Oct. 3, 2017, now U.S. Pat. No. 10,258,849 issued Apr. 16, 2019, which is a continuation of U.S. patent application Ser. No. 14/564,984, filed Dec. 9, 2014, now U.S. Pat. No. 9,795,845, issued Oct. 24, 2017, which is a continuation-in-part of U.S. patent application Ser. No. 13/593,253, filed Aug. 23, 2012, and now U.S. Pat. No. 9,433,834, issued on Sep. 6, 2016, which claims the benefit of U.S. Provisional Application No. 61/598,832, filed on Feb. 14, 2012, and also claims the benefit of U.S. Provisional Application No. 61/529,326, filed on Aug. 23, 2011, and is also a continuation-in-part of U.S. patent application Ser. No. 13/250,051, filed on Sep. 30, 2011, now U.S. Pat. No. 8,668,595, issued on Mar. 11, 2014, which claims the benefit of U.S. Provisional Application No. 61/480,332, filed Apr. 28, 2011. U.S. application Ser. No. 13/250,051 is also a continuation-in-part of U.S. patent application Ser. No. 12/723,951, filed on Mar. 15, 2010, which is a continuation-in-part of U.S. patent application Ser. No. 12/356,176, filed on Jan. 20, 2009, now U.S. Pat. No. 7,922,603, issued on Apr. 12, 2011. The content of all of the applications discussed above are incorporated by reference herein and made part hereof.
Number | Date | Country | |
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61598832 | Feb 2012 | US | |
61526326 | Aug 2011 | US | |
61480322 | Apr 2011 | US |
Number | Date | Country | |
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Parent | 16377067 | Apr 2019 | US |
Child | 16896080 | US | |
Parent | 15723381 | Oct 2017 | US |
Child | 16377067 | US | |
Parent | 14564984 | Dec 2014 | US |
Child | 15723381 | US |
Number | Date | Country | |
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Parent | 13593253 | Aug 2012 | US |
Child | 14564984 | US | |
Parent | 13250051 | Sep 2011 | US |
Child | 13593253 | US | |
Parent | 12723951 | Mar 2010 | US |
Child | 13250051 | US | |
Parent | 12356176 | Jan 2009 | US |
Child | 12723951 | US |