Patent Grant
11850486
The present disclosure relates to a golf club, and more specifically to a golf club having an adjustable length shaft that allows for selective lengthening or shortening of the club. In addition, the disclosure relates to an adjustable mass within a golf club shaft that allows for selective adjustment of club swing weight and moment of inertia while maintaining the overall weight of the club.
Golf clubs take various forms, for example a wood, a hybrid, an iron, a wedge, or a putter, and these clubs generally differ in head shape and design (e.g., the difference between a wood and an iron), club head material(s), shaft material(s), club length, and club loft.
Generally, when assembling a known golf club, the shaft is cut or trimmed to a desired length. Woods and hybrids generally have a longer shaft than irons, wedges, and putters, with putters generally having the shortest shaft length. After the shaft is trimmed to the desired length, the shaft is attached to the golf club head by a hosel. The shaft is typically attached to the golf club head with an epoxy or other adhesive. In some golf clubs, however, the shaft is coupled to an adapter that engages a removable threaded member in the hosel, securing the shaft to the golf club head. A grip is then installed on the shaft.
After assembly of these known golf clubs it is difficult to adjust the length of the shaft. A first option is to remove and replace the original shaft with a new shaft of a different length. Unfortunately, this option results in additional cost for the new shaft. A second option is to remove the grip, either cut off a portion of the butt end of the shaft (e.g., the end of the shaft opposite the golf club head) to shorten the shaft or install a shaft extension in the butt end of the shaft to lengthen the shaft, and then install a new grip. This option not only incurs additional expense associated with a new grip, but adjusting the shaft length at the butt end modifies the swing weight of the golf club (specifically, shortening drops swing weight while lengthening increases swing weight), modifies the total weight of the golf club (shortening drops total weight while lengthening increases total weight), and modifies the shaft stiffness (shortening generally increases shaft stiffness while lengthening generally decreases shaft stiffness). Both options are undesirable for the casual golfer due to the added expense, time incurred repairing or adjusting the golf club, and/or adverse changes to golf club total weight, golf club swing weight, and/or stiffness of the shaft.
While there are known options for adjusting the length of a golf club shaft, there is a need to improve adjustability of shaft length without substantially impacting the total weight, swing weight, or aesthetics of the golf club.
The present embodiments discussed below are directed to a golf club having a first shaft coupled to a club head, a second shaft configured to slidably engage a portion of the first shaft, a grip coupled to the second shaft, and an adjustable length shaft assembly received by the second shaft and configured to allow a portion of the first shaft to slide in relation to the second shaft. The adjustable length shaft assembly further includes an insert coupled to an axial end face of the first shaft that has a threaded engagement with a threaded screw. The threaded screw is configured to rotate, and the insert and first shaft are configured to translate together along the threaded screw to adjust the length of the golf club. The insert further comprises nodal protrusions positioned on an outer surface of the insert and ribs positioned on an inner surface of the insert to minimize side to side or radial movement between the first shaft and the second shaft during operation of the adjustable length shaft assembly.
In one embodiment, a golf club has a first shaft coupled to a club head, a second shaft configured to slidably engage a portion of the first shaft, a grip coupled to the second shaft, and an adjustable length shaft assembly received by the second shaft and configured to allow a portion of the first shaft to slide in relation to the second shaft in a first configuration, and to restrict a portion of the first shaft from sliding in relation to the second shaft in a second configuration. The grip is restricted from rotation about the first shaft or the second shaft as the first shaft slides in relation to the second shaft.
In another embodiment, a golf club has a shaft coupled to a club head, a grip coupled to the first shaft, and an adjustable mass assembly received by the shaft and having a mass configured to move within the shaft between the club head and the grip.
A method of manufacturing an adjustable length golf club includes coupling a first shaft to a club head, coupling a retainer to the first shaft, coupling an adjustable length shaft assembly to a second shaft, and coupling the first shaft to the second shaft, wherein the retainer engages a portion of the adjustable length shaft assembly.
Other features and aspects will become apparent by consideration of the following detailed description and accompanying drawings. Before any embodiments of the disclosure are explained in detail, it should be understood that the disclosure is not limited in its application to the details or construction and the arrangement of components as set forth in the following description or as illustrated in the drawings. The disclosure is capable of supporting other embodiments and of being practiced or of being carried out in various ways. It should be understood that the description of specific embodiments is not intended to limit the disclosure from covering all modifications, equivalents and alternatives falling within the spirit and scope of the disclosure. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting.
The terms “first,” “second,” “third,” “fourth,” and the like in the description and in the claims, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms “include,” and “have,” and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, device, or apparatus that comprises a list of elements is not necessarily limited to those elements, but can include other elements not expressly listed or inherent to such process, method, system, article, device, or apparatus.
The terms “left,” “right,” “front,” “back,” “top,” “bottom,” “over,” “under,” and the like in the description and in the claims, if any, are used for descriptive purposes and not necessarily for describing permanent relative positions. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the apparatus, methods, and/or articles of manufacture described herein are, for example, capable of operation in other orientations than those illustrated or otherwise described herein.
The terms “couple,” “coupled,” “couples,” “coupling,” and the like should be broadly understood and refer to connecting two or more elements, mechanically or otherwise. Coupling (whether mechanical or otherwise) can be for any length of time, e.g., permanent or semi-permanent or only for an instant.
For ease of discussion and understanding, and for purposes of description only, the following detailed description illustrates a golf club 10 as a putter. It should be appreciated that the putter is provided for purposes of illustration of the adjustable length shaft assembly that increases or decreases the shaft length of the golf club, and of the adjustable mass assembly that adjusts the swing weight and moment of inertia while maintaining the total weight of the golf club. The disclosed adjustable length shaft assembly and/or adjustable mass assembly can be used in association with any desired driver, fairway wood, wood generally, hybrid, iron, wedge, putter, or other golf club.
Referring now to the figures,
In various embodiments, the club length of the golf club 10 can be any suitable or desired club length. For example, the club length can be greater than or equal to 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, or 50 inches. The adjustable length shaft assembly as disclosed herein can adjust the club length between a range of any suitable or desired club lengths. For example, the adjustable length shaft assembly can adjust the club length by approximately 0-15 inches, 0-14 inches, 0-13 inches, 0-12 inches, 0-11 inches, 0-10 inches, 0-9 inches, 0-8 inches, 0-7 inches, 0-6 inches, 0-5 inches, 0-4 inches, 0-3 inches, 0-2 inches, 0-1 inches, or any other suitable range of adjustment in club length.
As a non-limiting example for a putter, the adjustable length shaft assembly can adjust the club length from the first club length L1 of approximately 36 inches to the second club length L2 of approximately 30 inches. It should be appreciated that the first club length L1 and the second club length L2 can be any suitable or desired respective club length, including the example club lengths disclosed herein.
In this example, the club length is adjustable between 0-6 inches. In other examples, the adjustable length shaft assembly can adjust the club length by approximately 0-15 inches, 0-14 inches, 0-13 inches, 0-12 inches, 0-11 inches, 0-10 inches, 0-9 inches, 0-8 inches, 0-7 inches, 0-5 inches, 0-4 inches, 0-3 inches, 0-2 inches, 0-1 inches, or any other suitable range of adjustment in club length.
As a non-limiting example for a driver, the adjustable length shaft assembly can adjust the club length from the first club length L1 of approximately 48 inches to the second club length L2 of approximately 44 inches. It should be appreciated that the first club length L1 and the second club length L2 can be any suitable or desired respective club length, including any of the example club lengths disclosed herein. In this example, the club length is adjustable between 0-4 inches. In other examples, the adjustable length shaft assembly can adjust the club length by approximately 0-15 inches, 0-14 inches, 0-13 inches, 0-12 inches, 0-11 inches, 0-10 inches, 0-9 inches, 0-8 inches, 0-7 inches, 0-6 inches, 0-5 inches, 0-3 inches, 0-2 inches, 0-1 inches, or any other suitable range of adjustment in club length.
As a non-limiting example for a fairway wood, the adjustable length shaft assembly can adjust the club length from the first club length L1 of approximately 44 inches to the second club length L2 of approximately 38 inches. It should be appreciated that the first club length L1 and the second club length L2 can be any suitable or desired respective club length, including any of the example club lengths disclosed herein. In this example, the club length is adjustable between 0-6 inches. In other examples, the adjustable length shaft assembly can adjust the club length by approximately 0-15 inches, 0-14 inches, 0-13 inches, 0-12 inches, 0-11 inches, 0-10 inches, 0-9 inches, 0-8 inches, 0-7 inches, 0-5 inches, 0-4 inches, 0-3 inches, 0-2 inches, 0-1 inches, or any other suitable range of adjustment in club length.
As a non-limiting example for a hybrid, the adjustable length shaft assembly can adjust the club length from the first club length L1 of approximately 42 inches to the second club length L2 of approximately 35 inches. It should be appreciated that the first club length L1 and the second club length L2 can be any suitable or desired respective club length, including any of the example club lengths disclosed herein. In this example, the club length is adjustable between 0-7 inches. In other examples, the adjustable length shaft assembly can adjust the club length by approximately 0-15 inches, 0-14 inches, 0-13 inches, 0-12 inches, 0-11 inches, 0-10 inches, 0-9 inches, 0-8 inches, 0-6 inches, 0-5 inches, 0-4 inches, 0-3 inches, 0-2 inches, 0-1 inches, or any other suitable range of adjustment in club length.
As a non-limiting example for one or more irons or wedges, the adjustable length shaft assembly can adjust the club length from the first club length L1 of approximately 42 inches to the second club length L2 of approximately 35 inches. It should be appreciated that the first club length L1 and the second club length L2 can be any suitable or desired respective club length, including any of the example club lengths disclosed herein.
It should be appreciated that adjustment of the club length with the adjustable length shaft assembly as described herein is not discrete. Rather, the adjustable length shaft assembly described herein allows for adjustment of the club length to any length or position between the first club length L1 and the second club length L2.
Referring to
Referring to
As illustrated in
In other embodiments, the retainer 112, the second shaft 120, or the insert 128 can be made of a material described above and further include a filler. The filler can be glass, carbon fiber, metal, or any other suitable filler. The material of the retainer 112, the second shaft 120, or the insert 128 can comprise a filler percentage by volume. In some embodiments, the material of the retainer 112, the second shaft 120, or the insert 128 can comprise 0-90% filler by volume. In some embodiments, the material of the retainer 112, the second shaft 120, or the insert 128 can comprise 0-50%, or 50-90% filler by volume. In some embodiments, the material of the retainer 112, the second shaft 120, or the insert 128 can comprise 0-40%, 10-50%, 20-60%, 30-70%, 40-80%, 50-90%, or 60-100% filler by volume. For example, the material of the retainer 112, the second shaft 120, or the insert 128 can comprise 0%, 10%, 20%, 30%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, or 90% filler by volume. For further example, the insert 128 can be made of nylon 66 with 30% carbon fiber filler by volume. For further example, the insert 128 can be made of nylon 66 with 50% glass filler by volume. For further example, the retainer 112 can be made of nylon 66 with 50% glass filler by volume. For further example, the second shaft 120 can be made of nylon 66 with 30% carbon fiber filler by volume.
In operation of the adjustable length shaft assembly 100, a user inserts a portion of a torque wrench into the aperture 46 defined by the grip 34 to engage the torque wrench with the socket 108 of the screw head 104. To increase the club length of the golf club 10, the user rotates the torque wrench in a first direction, rotating the screw head 104 and associated screw 140 within the retainer 112. The threads of screw 140 cooperate with the threads of the aperture 136 in the insert 128. The protrusion 132 fixes the rotational position of the insert 128 relative to the second shaft 120, such that the rotation of the screw 140 drives the insert 128 axially along the slot 124. As the screw 140 rotates in the first direction, the protrusion 132 translates within the slot 124, moving the insert 128 away from the second end 116 and the first shaft 22 away from the second shaft 120. The insert 128 and the first shaft 22 move together and away from the second end 116 as the screw 140 rotates in the first direction. The insert 128 is positioned away from the second end 116 in an extended or expanded configuration. The protrusion 132 in the slot 124 also restricts rotation of the second shaft 120 in relation to the first shaft 22, maintaining the orientation of the grip 34 in relation to the club head 14 (or stated another way, the protrusion 132 restricts rotation of the grip 34 about the first shaft 22). This is advantageous for certain clubs, for example, a putter having a paddle grip 34 (i.e., a flat surface on the grip 34), as the paddle maintains its orientation with the club head 14 as the club length increases (or decreases). Once the desired club length is attained, the user removes the torque wrench from the screw head 104, temporarily locking the adjustable length shaft assembly at the desired club length.
Similarly, to decrease the club length of the golf club 10, the user engages the torque wrench with the socket 108 of the screw head 104 and rotates the torque wrench in a second direction, opposite the first direction. As the screw 140 rotates in the second direction, the insert 128 moves towards the second end 116 and the first shaft 22 moves towards the second shaft 120. The insert 128 and the first shaft 22 move together towards the second end 116 as the screw 140 rotates in the second direction. The insert 128 can abut or be adjacent to the retainer 112 in a fully contracted configuration. The protrusion 132 in the slot 124 again restricts rotation of the second shaft 120 in relation to the first shaft 22, maintaining the orientation of the grip 34 in relation to the club head 14 (or restricts rotation of the grip 34 about the first shaft 22). Once the desired club length is attained, the user removes torque wrench from the screw head 104, temporarily locking the adjustable length shaft assembly at the desired club length.
The threaded screw 140 can be a single start screw having a single thread, or the threaded screw 140 can be a multi-start screw having more than one thread. The threads of the threaded screw 140 can be continuous along the length of the threaded screw 140. In other embodiments, the threads of the threaded screw 140 can be discontinuous along the length of the threaded screw 140. For example, the threaded screw 140 can have one, two, three, four, five, or any other number of threads. In embodiments where the threaded screw 140 is a multi-start screw, length adjustments can be made with fewer rotations of the torque wrench than with the single start threaded screw. Accordingly, a multi-start threaded screw can allow for faster length adjustment of the golf club 10 having the adjustable length shaft assembly 100. The threaded screw 140 can have at least one channel running along the length of the threaded screw 140 to ease in the molding process (not shown). The channels running along the length of the threaded screw 140 can break up the threads into one or more threaded regions. The one or more threaded regions can be interspersed with non-threaded regions along the length of the threaded screw 140 (not shown). Stated another way, the one or more threaded regions can be separated by non-threaded regions along the length of the threaded screw 140 (not shown). In one embodiment, the threaded screw 140 can have at least one channel, two channels, three channels, or four channels running along the length of the threaded screw. In another embodiment, the threaded screw 140 can have two channels cut into the thread on either side of the threaded screw 140 to ease in the molding process. The channels can run for part or all the length of the threaded screw 140 (not shown).
To prevent the user from applying excessive torque on the screw head 104 as the user increases or decreases the length of the golf club 10, the torque wrench can be a torque limiting tool 150.
In the illustrated embodiment, the second shaft includes the slot and the insert includes the protrusion. In other embodiments, the second shaft can include more than one slot and the insert can include more than one protrusion. The second shaft can have any number of slots, such as one, two, three, four, five, or any other number of slots. The insert can have any number of protrusions corresponding to the number of slots, such as one, two, three, four, five, or any other number of protrusions. For example, the second shaft can include three slots that correspond to three protrusions on the insert, or the second shaft can include four slots that correspond to four protrusions on the insert. In some embodiments, the slots can be positioned equidistant or asymmetric around the second shaft. Further, the protrusions can be positioned equidistance or asymmetric around the insert.
In other embodiments still, the second shaft can include the one or more protrusions, and the insert can include the one or more slots. In these or other embodiments, the second shaft can have any number of protrusions, such as one, two, three, four, five, or any other number of protrusions. In these or other embodiments, the insert can have any number of slots corresponding to the number of protrusions, such as one, two, three, four, five, or any other number of slots. For example, the second shaft can include three protrusions that correspond to three slots on the insert, or the second shaft can include four protrusions that correspond to four slots on the insert. In some embodiments, the protrusions can be positioned equidistant or asymmetric around the second shaft. Further, the slots can be positioned equidistance or asymmetric around the insert.
Referring to
As depicted in
Referring now to
The retainer 212 includes a well 224 defining a recess connected to a tubular portion 228. The tubular portion 228 extends away from the well 224 and into the second shaft 120. The tubular portion 228 also defines an opening or open end 230 (shown in
The retainer 212 slidably receives the adjustment member 208, such that the adjustment member 208 slides within the retainer 212. The well 224 slidably receives the head 216, while the tubular portion 228 slidably receives a portion of the member 220, with the member 220 extending through the tubular portion 228 and out the open end 230. To facilitate slidable movement of the adjustment member 208 within the retainer 212, the tubular portion 228 has an inner diameter that is complementary to an outer diameter of the member 220. Similarly, the well 224 has an inner diameter that is complementary to an outer diameter of the head 216. The complementary sizes allows the adjustment member 208 to slide in an axial direction, or a direction approximately parallel to the first and second shafts 22, 120, with respect to the retainer 212.
The adjustment member 208 is resiliently connected to the retainer 212 by a biasing member or spring 232. In the illustrated embodiment, the biasing member 232 is coupled to the adjustment member 208, and more specifically to the head 216 of the adjustment member 208. The biasing member 232 is also received by the well 224 of the retainer 212.
Referring back to
As depicted in
In the illustrated embodiment, the elastic member 240 has a generally cylindrical shape and includes a central channel 244 that receives a portion of the compression assembly 204, and more specifically a portion of the retainer 212 that carries a portion of the adjustment member 208. A portion of the adjustment member 208 preferably extends entirely through the elastic member 240. To assist with retention of the elastic member 240, the retainer 212 includes a first compression member retainer 248, while the adjustment member 208 includes a second compression member retainer 252. The first compression member retainer 248 can be a plurality of fins or an annular, ring-like member that projects away from the tubular portion 228 of the retainer 212. The first compression member retainer 248 can be integrally formed with the retainer 212, or in other embodiments, can be attached or otherwise connected to the retainer 248. Preferably, the first compression member retainer 248 has a diameter or circumference larger than a diameter or circumference of the tubular portion 228 of the retainer 212 but smaller than an inner diameter or inner circumference of the first shaft 22.
The second compression member retainer 252 can be an annular, ring-like member that projects away from the member 220 of the adjustment member 208. The second compression member retainer 252 can receive a portion of the member 220, forming a connection by a threaded, screw-like interconnection. In other embodiments, the second compression member retainer 252 can be integrally formed with or otherwise connected to the member 220. Preferably, the second compression retainer 252 has a diameter or circumference larger than a diameter or circumference of the member 220 but smaller than an inner diameter or inner circumference of the first shaft 22.
The biasing member 232 applies tension between the adjustment member 208 and the retainer 212, as the adjustment member 208 is held in place in relation to the retainer 212 by the second compression member retainer 252. As the biasing member 232 applies the biasing force, the second compression member retainer 252 contacts the retainer 212 and/or the elastic member 240 to counteract the biasing force and create tension. In other embodiments of the compression assembly 204, the biasing member 232 can apply tension between any suitable portion of the adjustment member 208 and any suitable portion of the retainer 212. For example, the biasing member 232 can be positioned within the second shaft 120 between a portion of the adjustment member 208 and a portion of the retainer 212. In this example, the adjustment member 208 and the retainer 212 can respectively include projections that contact opposing ends of the biasing member 232 and facilitate application of tension between the adjustment member 208 and the retainer 212. In addition, in other embodiments the biasing member 232 can or can not be connected to one or both of the adjustment member 208 and/or the retainer 212.
The comparative sizing of the first and second compression member retainers 248, 252 in relation to other components provide for retention of the elastic member 240 while also providing axial sliding of the compression assembly 204 (and attached second shaft 120) in relation to the first shaft 22. The comparative sizing is provided for purposes of illustration. In other embodiments, the elastic member 240 and compression member retainers 248, 252 can be of any suitable size, shape, or positioning in relation to one another to permit compression assembly 204 to selectively apply compressive force between the first shaft 22 and the compression assembly 204 to selectively retain the compression assembly 204, and the attached second shaft 120, with the first shaft 22.
The compression assembly 204 is adjustable between a first configuration, as illustrated in
As illustrated in
To adjust the club length of the golf club 10, a user inserts the torque wrench into the aperture 46 defined by the grip 34 to engage the torque wrench with the socket 108 of the head 216. The user then applies a force by the torque wrench in a direction 260 opposite the biasing force direction 256 sufficient to overcome the biasing force, i.e., which compresses the biasing member 232. As the biasing member 232 compresses, the adjustment member 208 slides within the retainer 212, and more specifically slides in the second direction 260 towards the club head 14. The head 216 slides within the well 224 in the second direction 260 towards the club head 14, while the second compression member retainer 252 moves away from the first compression member retainer 248, increasing the distance between the first and second compression member retainers 248, 252.
The second compression member retainer 252 in turn withdraws the compressive force against the elastic member 240, allowing the elastic member 240 to contract radially inward towards the axial direction of the first and second shafts 22, 120 and disengaging the first shaft 22. Once the elastic member 240 is disengaged from the first shaft 22, the first and second shafts 22, 120 are free to move in relation to one another, and the user can adjust the club length of the golf club 10. The compression assembly 204 is now in the second configuration, which is not illustrated.
More particularly, to adjust the club length of the golf club 10, the user maintains application of the force by the torque wrench in the second direction 260, and then slides the first shaft 22 in relation to the second shaft 120. To increase the club length of the golf club 10, the user slides the first shaft 22 away from the second shaft 120 (in the first direction 256), withdrawing a portion of the first shaft 22 from the second shaft 120. To decrease the club length of the golf club 10, the user slides the first shaft 22 towards the second shaft 120 (in the second direction 260), inserting a portion of the first shaft 22 into the second shaft 120. As the first shaft 22 axially moves in the axial direction (in either the first or second directions 256, 260), the attached insert 128 moves with the first shaft 22. Thus, the insert 128 both axially moves along the tubular portion 228 of the retainer 212, and the slot 124 retains and guides the protrusion 132 on the insert 128. This combination assists with adjusting the first shaft 22 in relation to the second shaft 120 to increase or decrease the club length of the golf club 10, while also restricting rotation of the second shaft 120 in relation to the first shaft 22 to maintain the orientation of the grip 34 in relation to the club head 14 (i.e., restricts rotation of the grip 34 about the first shaft 22). It should be appreciated that the adjustment of the club length by sliding the first shaft 22 in relation to the second shaft 120 is provided for purposes of illustration, and either of the first and second shafts 22, 120 can slide in relation to the other.
Once the user adjusts the first shaft 22 and/or second shaft 120 to the desired club length of the golf club 10, the user withdraws application of the force by the torque wrench in the second direction 260. This leads to a transition of the compression assembly 204 from the second configuration back to the first configuration. The biasing member 232 applies the biasing force to the head 216 of the adjustment member 208 in the first direction 256, drawing the second compression member retainer 252 towards the first compression member retainer 248. The second compression member retainer 252 in turn applies a compressive force to the elastic member 240, expanding the elastic member 240 radially outward to engage with the first shaft 22 and restrict movement of the retainer 212 in relation to the first shaft 22 in the axial direction along axis A (see FIGS. 1-2). This in turn restricts or minimizes movement of the second shaft 120 in relation to the first shaft 22, and thus the club length of the golf club 10 can not be adjusted.
In the illustrated embodiment, the second shaft includes the slot and the insert includes the protrusion. In other embodiments, the second shaft can include more than one slot and the insert can include more than one protrusion. The second shaft can have any number of slots, such as one, two, three, four, five, or any other number of slots. The insert can have any number of protrusions corresponding to the number of slots, such as one, two, three, four, five, or any other number of protrusions. For example, the second shaft can include three slots that correspond to three protrusions on the insert, or the second shaft can include four slots that correspond to four protrusions on the insert. In some embodiments, the slots can be positioned equidistant or asymmetric around the second shaft. Further, the protrusions can be positioned equidistance or asymmetric around the insert.
In other embodiments still, the second shaft can include the one or more protrusions, and the insert can include the one or more slots. In these or other embodiments, the second shaft can have any number of protrusions, such as one, two, three, four, five, or any other number of protrusions. In these or other embodiments, the insert can have any number of slots corresponding to the number of protrusions, such as one, two, three, four, five, or any other number of slots. For example, the second shaft can include three protrusions that correspond to three slots on the insert, or the second shaft can include four protrusions that correspond to four slots on the insert. In some embodiments, the protrusions can be positioned equidistant or asymmetric around the second shaft. Further, the slots can be positioned equidistance or asymmetric around the insert.
Referring to
As shown in
As depicted in
The retainer 312 includes a well 324 defining a recess that leads to a channel or aperture 328 provided through the retainer 312. The retainer 312 is received by the second shaft 120 through the second end 116. In addition, the retainer 312, and more specifically the well 324, is attached to the second shaft 120 at the second end 116. The retainer 312 does not rotate or otherwise move independently of the second shaft 120. Instead, the retainer 312 travels with the second shaft 120.
The retainer 312 slidably receives the adjustment member 308, such that the adjustment member 308 slides independently of the retainer 312. More specifically, the recess slidably receives the head 316, while the channel 328 slidably receives a portion of the member 320. To facilitate slidable movement of the adjustment member 308 within the retainer 312, the channel 328 has an inner diameter that is complementary to an outer diameter of the member 320. Similarly, the well 324 has an inner diameter that is complementary to an outer diameter of the head 316. The complementary sizes allows the adjustment member 308 to slide in an axial direction, or a direction approximately parallel to the first and second shafts 22, 120, with respect to the retainer 312.
The adjustment member 308 is resiliently connected to the retainer 312 by a biasing member or spring 332. In the illustrated embodiment, the biasing member 332 is coupled to the adjustment member 308, and more specifically to the head 316 of the adjustment member 308. The biasing member 332 is also received by the well 324 of the retainer 312.
The insert 128 defines an aperture 336. The aperture 336 slidably receives the adjustment member 308, and more specifically a portion of the member 320 of the adjustment member 308. The aperture 336 has an inner diameter that is complementary to an outer diameter of the member 320 to allow the insert 128 to slide along a portion of the member 320.
Referring now to
Referring to
As illustrated in
To adjust the club length of the golf club 10, a user can axially slide the first shaft 22 in relation to the second shaft 120. To decrease the club length of the golf club 10, the user slides the first shaft 22 towards the second shaft 120 (in the first direction 376), further inserting the first shaft 22 into the second shaft 120. To increase the club length of the golf club 10, the user slides the first shaft 22 away from the second shaft 120 (in a second direction 380, shown in
Once the user adjusts the first shaft 22 and/or second shaft 120 to the desired club length of the golf club 10, the user transitions the cam lock assembly 304 from the unlocked configuration to the locked configuration. The user inserts the torque wrench into the aperture 46 defined by the grip 34 to engage the torque wrench with the socket 108 of the head 316. The user then applies a rotating force by the torque wrench in a first rotational direction, which is clockwise in the illustrated embodiment. Rotation of the torque wrench in the first rotational direction rotates the head 316, the attached cam member 340, and generally the adjustment member 308.
During rotation, the cam member 340 slides along the slot 344, moving from the first end 348 towards the second end 352. The slot 344 translates the rotational force from the torque wrench into a linear force that overcomes the biasing force imparted by the biasing member 332. This results in the adjustment member 308 sliding along the axis A (shown in
With reference to
To transition the cam lock assembly 304 from the locked configuration to the unlocked configuration, the user inserts the torque wrench into the socket 208 and applies torsional and downward force in the second direction 380 (or towards the club head 14) to overcome the biasing force applied by the biasing member 332 against the head 316. While applying the downward force on the head 316, the user rotates the torque wrench in a second rotational direction, which is counterclockwise in the illustrated embodiment. This disengages the cam member 340 from the locking portion 356 and moves the cam member 340 towards the second end 352 of the slot 344. Continued rotation in the second rotational direction further rotates the head 316, and moves the cam member 340 along the slot 344 from the second end 352 to the first end 348. It should be appreciated that the biasing force applied on the head 316 by the biasing member 332 contributes to moving the cam member 340 to the first end 348 of the slot 344. As the head 316 rotates, the cam portion 368 rotates within the channel 364 about the insert 124 from the locked configuration (shown in
It should be appreciated that the geometry of the cam lock assembly 304, and more specifically the slot 344 and associated offset locking portion 356 are provided for purposes of illustration. In other embodiments, the geometry can be adjusted while maintaining the same function. For example, the geometry can be such that to rotate the adjustment member 308 from the unlocked configuration to the locked configuration, the user rotates the torque wrench in a first rotational direction, which is counterclockwise rotation of the torque wrench. Similarly, to rotate the adjustment member 308 from the locked configuration to the unlocked configuration, the user rotates the torque wrench in a second rotational direction, which is clockwise rotation of the torque wrench.
It should also be appreciated that in other embodiments, aspects of the adjustable length shaft assembly 300 can be modified, added, or removed while continuing to selectively adjust and maintain the length of the golf club 10. For example, in an embodiment of the adjustable length shaft assembly 300, the cam lock assembly 304 does not include the biasing member 332, cam member 340, or slot 344. Instead, the cam lock assembly 304 includes the cam portion 368 that rotates within the channel 364 between the unlocked configuration (shown in
In another embodiment of the adjustable length shaft assembly 300, the biasing member 332, cam member 340, and slot 344 of the cam lock assembly 304 are replaced by a plurality of threads that extend around an outer circumference or perimeter of the head 316 that cooperate with threads that extend around the recess defined by the well 324. Rotation of the head 316 forms translational motion of the adjustment member 308 in the axial direction.
In another embodiment of the adjustable length shaft assembly 300, the slot 344 is positioned perpendicular to the axis A (shown in
Referring to
Referring to
In the illustrated embodiment, the inner surface 122 of the second shaft 120 and the outer surface 130 of the insert 128 are substantially hexagonal in cross sectional shape. In other embodiments, the cross sectional shape of the inner surface 122 of the second shaft 120 and the outer surface 130 of the insert can be any shape capable of restricting rotational motion between the second shaft 120 and the insert 128. For example, the cross sectional shape of the inner surface 122 of the second shaft 120 and the outer surface 130 of the insert 128 can be a polygon or a shape with at least one curved surface, such as a semi-circle, triangle, square, rectangle, pentagon, hexagon, or any other shape.
Referring to
Further, in other embodiments, the second shaft 120 can include a gasket in addition to or instead of the tabs 126. The second shaft 120 can have one or more grooves (171) to receive the gasket 170. The second shaft 120 can have one, two, three, or four grooves (171) to receive the gasket 170. The gasket 170 can be made of rubber, polyurethane, a polymeric material or any other material capable of providing a secure fit between the first shaft 22 and the second shaft 120 (
Further, in other embodiments, the second shaft 120 can include an overmolded section that provides a secure fit between the second shaft 120 and the first shaft 22 (not shown). The second shaft 120 can have the overmolded section in the bottom 0.5 inches, 1.0 inches, 1.5 inches, 2.0 inches or 2.5 inches of the second shaft 120. This overmolded section may comprise a polymeric material, rubber, a like rubber material, or any other material capable of providing a secure fit between the first shaft 22 and the second shaft 120 (not shown). Further, the second shaft 120 having the overmolded section can travel the length of the threaded screw 140 limiting side to side movement between the first shaft 22 and the second shaft 120.
The adjustable length shaft assembly 500 described herein can be operated in the same manner as the adjustable length shaft assembly 100, as described above, wherein restricting rotational motion of the first shaft 22 relative to the second shaft 120 is achieved with the cross sectional shapes of the inner surface 122 of the second shaft 120 and the outer surface 130 of the insert 128, instead of the slot and protrusion mechanism.
Referring to
In the illustrated embodiment, the retainer 812 includes two half circle pieces. The two pieces of the retainer 812 snap fit into the second end 116 of the second shaft 120 to improve the concentricity of the threaded screw 140 within the second shaft 120. The improved concentricity better aligns the first shaft 22 within the second shaft 120. To achieve the improved concentricity, the outer surface 114 of the retainer 812 further includes one or more pegs 818. The one or more pegs 818 extend outward from the outer surface 114 of the retainer 812 and are configured to be received by one or more apertures 820 disposed on the second shaft 120. The interlocking geometry between the pegs 818 and the apertures 820 allows the retainer 812 to remain static with respect to the second shaft 120, but allow for rotation of the screw head 104.
The inner surface 122 of the second shaft 120 includes a cross sectional shape that is substantially hexagonal. The outer surface 114 of the retainer 812 includes a cross sectional shape that is substantially hexagonal, corresponding to the inner surface 122 of the second shaft 120. The cross sectional shapes of the inner surface 122 of the second shaft 120 and the outer surface 114 of the retainer 812 allows the retainer 812 to remain static within the second shaft 120, while still allowing for the threaded screw 140 to rotate.
In other embodiments, the cross sectional shape of the outer surface 114 of the retainer 812 can be any shape capable allowing the retainer 812 to remain static within the second shaft 120. For example, the cross sectional shape of the outer surface 114 of the retainer 812 can be a polygon or a shape with at least one curved surface, such as a semi-circle, triangle, square, rectangle, pentagon, hexagon, or any other shape.
Further, as illustrated in
As illustrated in
The nodal protrusions 814 can include a shape that is substantially spherical. In other embodiments, the nodal protrusions 814 can be any shape capable of abutting or pressing against the inner surface 122 of the second shaft 120. For example, the shape of the nodal protrusions 814 can be a semi-circle, or a shape with at least one curved surface, such as a hemi-sphere, cylinder, triangle, square, rectangle, pentagon, hexagon, polygon, or any other shape.
In the illustrated embodiment, the outer surface 114 of the retainer 812 includes 8 nodal protrusions 814, where 2 nodal protrusions 814 are positioned on the sides of the hexagonal retainer 812. In other embodiments, the retainer 812 can include any number of nodal protrusions 814. For example, the retainer 812 can include 4-24, 4-18, or 4-12 nodal protrusions 814. In other examples, the retainer 812 can include 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, or 24 nodal protrusions 814.
The insert 828 defines a first axial end face 838 and a second axial end face 840. The first axial end face 838 is located closer to the second end 116 of the second shaft 120. The second axial end face 840 is located closer to the first end 118 of the second shaft 120. The insert 828 extends into a portion of the first shaft 22 and engages with the first shaft 22, where the second axial end face 840 is located within the first shaft 22. The engagement between the insert 828 and the first shaft 22 defines an engagement length. The engagement length is defined as an axial length between the axial end face 32 of the first shaft 32 and the second axial end face 840 of the insert 828. The engagement length between the insert 828 and the first shaft 22 improves the stiffness of the adjustable shaft length assembly 800 thereby limiting side to side movement or radial movement between the first shaft 22 and the second shaft 120 during operation of the adjustable shaft length assembly 800. The insert 828 can engage a larger portion of the first shaft 22 to improve the alignment of the first shaft 22 within the second shaft 120. Better alignment of the first shaft 22 reduces misalignment thereby allowing the first shaft 22 to freely translate without interfering with the second shaft 120.
In the illustrated embodiment, the engagement length between the insert 828 and the first shaft 22 is 5.0 inches. In other embodiments, the engagement length can be 2-10 inches. In other embodiments, the engagement length can be 2-5, or 5-10 inches. In other embodiments still, the engagement length can be 2-6, 3-7, 4-8, 5-9, or 6-10 inches. For example, the engagement length can be 2, 3, 4, 5, 6, 7, 8, 9, or 10 inches.
Referring to
In the illustrated embodiment, the inner surface 122 of the second shaft 120 and the outer surface 130 of the insert 828 are substantially hexagonal in cross sectional shape. In other embodiments, the cross sectional shape of the inner surface 122 of the second shaft 120 and the outer surface 130 of the insert can be any shape capable of restricting rotational motion between the second shaft 120 and the insert 828. For example, the cross sectional shape of the inner surface 122 of the second shaft 120 and the outer surface 130 of the insert 828 can be a polygon or a shape with at least one curved surface, such as a semi-circle, triangle, square, rectangle, pentagon, hexagon, or any other shape.
Referring to
The nodal protrusions 832 can include a shape that is substantially spherical. The nodal protrusions 832 of the insert 828 can include a shape similar to the nodal protrusions 814 of the retainer 812. In other embodiments, the nodal protrusions 832 can be any shape capable of abutting or pressing against the inner surface 122 of the second shaft 120. For example, the shape of the nodal protrusions 832 can be a semi-circle, or a shape with at least one curved surface, such as a hemi-sphere, cylinder, triangle, square, rectangle, pentagon, hexagon, polygon, or any other shape.
In the illustrated embodiment, the outer surface 130 of the insert 828 includes 60 nodal protrusions 832, where 24 nodal protrusions 832 abut or press against the inner surface 122 of the second shaft 120, and 36 nodal protrusions 832 abut or press against the inner surface 24 of the first shaft 22. In other embodiments, the insert 828 can include any number of nodal protrusions 832. For example, the insert 828 can include 10-100, 10-90, 10-80, 10-70, or 10-60 nodal protrusions 832. In other examples, the insert 828 can include 10-50, 20-60, 30-70, 40-80, 50-90, or 60-100 nodal protrusions 832. In other examples still, the insert 828 can include 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100 nodal protrusions 832.
Further, the nodal protrusions 832 can comprise a height. The height of the nodal protrusions 832 is measured from the outer surface 130 of the insert 828 to an apex of the nodal protrusion 832 in a direction perpendicular to the outer surface 130 of the insert 828. The nodal protrusion 832 height of the insert 828 and the nodal protrusion 814 height of the retainer 812 can be similar. The height of the nodal protrusions 832 can range from 0.005 to 0.015 inch. In some embodiments, the height of the nodal protrusions 832 can range from 0.005 to 0.01 inch, or 0.01 to 0.015 inch. For example, the height of the nodal protrusions 832 can be 0.005, 0.006, 0.007, 0.008, 0.009, 0.01, 0.011, 0.012, 0.013, 0.014, or 0.015 inch. In one example, the height of the nodal protrusions 832 is 0.01 inch.
Referring to
Further, the ribs 834 can comprise a height. The height of the ribs 834 is measured from the inner surface 138 to an apex of the rib 834 in a direction perpendicular to the inner surface 138 of the insert 828. The height of the ribs 834 is measured in a direction radially inward from the inner surface 138 to a centerline extending through the threaded aperture 136 and the tubular portion 836 of the insert 828. The height of the ribs 834 can range from 0.001 to 0.01 inch. In some embodiments, the height of the ribs 834 can range from 0.001 to 0.005 inch, or 0.005 to 0.01 inch. For example, the height of the ribs 834 can be 0.001, 0.002, 0.003, 0.004, 0.005, 0.006, 0.007, 0.008, 0.009, or 0.01 inch. In one example, the height of the ribs 834 is 0.005 inch.
Referring to
The threaded aperture 136 of the insert 828 receives the threaded screw 140. The threaded screw 140 is configured to have a threaded engagement with the threaded aperture 136. As described above for adjustable shaft length assembly 100, the threaded engagement between the threaded screw 140 and the threaded aperture 136 allows the first shaft 22 and the second shaft 120 to axially move in relation to one another, and temporarily lock the adjustable shaft length assembly in the axial direction when not in use.
In operation of the adjustable length assembly 800, the threads of screw 140 cooperate with the threads of the aperture 136 of the insert 828. As the insert 828 and the first shaft 22 move towards the second end 116, the threaded screw 140 overlaps a portion of the tubular portion 836 of the insert 828. The threads of screw 140 cooperate with the one or more ribs 834 to provide a secure fit between the insert 828 and the threaded screw 140. The threads of screw 140 cut into the one or more ribs 834. The cutting operation between the threaded screw 140 and the ribs 834 is achieved with a diameter of the threaded screw 140 and an opening diameter between the one or more ribs 834.
In the illustrated embodiment, the diameter of the threaded screw 140 is greater than the opening diameter between the one or more ribs 834. In the illustrated embodiment, the diameter of the threaded screw 140 is 0.25 inch, and the opening diameter between the one or more ribs 834 is 0.242 inch. However, the diameters of the threaded screw 140 and the opening between the one or more ribs 834 are not limited and can be any diameter suitable for the threaded screw 140 to cut into the one or more ribs 834. The cutting operation between the threaded screw 140 and the one or more ribs 834 provides a secure fit by minimizing side to side movement or radial movement of the first shaft 22 within the second shaft 120.
The adjustable shaft length assembly 800 described herein can be operated in the same manner as the adjustable shaft length assembly 100 or 500, as described above, wherein restricting rotation motion of the first shaft 22 relative to the second shaft 120 is achieved with the cross sectional shapes of the inner surface 122 of the second shaft 120 and the outer surface 130 of the insert 128 similar to adjust shaft length assembly 500.
The mass 404 is a piece of weighted material, which can include rubber, metal, metal alloy, composite, polyurethane, reinforced polyurethane or any other suitable material or combination of materials. The mass 404 can be any suitable size provided the mass 404 fits and is moveable within the shaft 22. The mass 404 can be any suitable or desired weight, which can include, for example, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, or more than 20 grams. The mass 404 can be removable from the shaft 22 and replaceable with a second mass 404 having a different weight, size, shape, or combination thereof.
In one or more examples of embodiments, the mass 404 can include a plurality of masses 404 having the same or different weights, sizes, shapes, or combinations thereof. For example, a plurality of masses 404 can be axially arranged or stacked within the shaft 22. As another example, a plurality of masses 404 can be in a radially offset arrangement within the shaft 22. In still other embodiments, the mass 404 can incorporate flexible material(s) that allow for axial movement of the mass 404 in shafts 22 having different or variable shaft diameters, resulting in less influence on shaft stiffness.
In yet another embodiment, the mass 404 can be defined by a plurality of separate shaft sections that together define the shaft 22. One or more sections can be exchangeable or replaceable with a section having a different mass (for example a section having greater mass or less mass). The sections can be coupled together to define the club shaft 22.
Referring now to
The adjustment assembly 408 includes the screw head 104 that is received by the retainer 112 and is static with respect to the shaft 22. The retainer 112 is itself received by the second end or butt end 30 of the shaft 22. The shaft 22 includes a slot or cutout 124 that extends axially along an axis A (shown in
The mass 404 is received in the shaft 22, and includes a protrusion 132 that projects away from the mass 404 and is keyed to be received by the slot 124. The mass 404 also defines the threaded aperture 136. The threaded aperture 136 receives a corresponding threaded screw 140 that extends away from the screw head 104. The grip 34 is attached to the shaft 22.
In operation of the adjustable mass assembly 400, a user engages a torque wrench with the socket 108 of the screw head 104. To adjust the position of the mass 404 within the shaft 22, the user rotates the torque wrench in a first direction, rotating the screw head 104 and associated screw 140 within the retainer 112. The threads of screw 140 cooperate with the threads of the aperture 136 in the mass 404. The protrusion 132 fixes the rotational position of the mass 404 relative to the shaft 22, such that the rotation of the screw 140 drives the mass 404 axially along the slot 124. As the screw 140 rotates in the first direction, the mass 404 is driven away from the second end 30. Alternatively, the user rotates the torque wrench in a second direction opposite the first direction to move the mass 404 within the shaft 22 towards the second end 30. Once the desired position of the mass 404 within the shaft 22 is attained, the user removes the torque wrench from the screw head 104.
In another embodiment of the adjustable mass assembly 400 (similar to
The screw nut 414 has inner surface threads which threadably engage with the threaded body 410 of the mass 404. The threads of the inner surface 416 of the screw nut 414 guide the mass 404 to move axially relative to the shaft 22 when the mass 404 is rotated. The screw nut 414 further comprises an outer surface 418 which is attached to an inner surface 416 of the shaft 22 at a fixed location along the shaft 22. The screw nut 414 may be attached to the inner surface of the shaft 22 by an adhesive such as epoxy, glue, tape, or etc.
The screw head 412 of the mass 404 comprises a socket 108 exposed at an aperture 46 at the butt portion of the shaft 22. A portion of a torque wrench 150 can be inserted through the aperture 46 and into the socket 108 of the screw head 412 to adjust the position of the mass 404 within the shaft 22. Rotating the torque wrench 150 in a clockwise motion will shift the mass 404 lower down the shaft 22 or closer to the club head. Similarly, rotating the torque wrench 150 in a counterclockwise motion will shift the mass 404 higher up the shaft 22 or closer to the butt portion. The shifting of the mass 404 affects the moment of inertia, and the swing weight of the golf club 10. The distance and weight of the mass 404 shifts per one full revolution of the torque wrench 150 is dependent on the pitch of the threaded body 410. For example, rotating the torque wrench 150 five revolutions for a mass 404 having a weight of 4 grams will shift the mass 404 1.25 inches while changing the swing weight by 0.1. In another example, rotation the torque wrench 150 two and a half revolutions for a mass 404 having a weight of 8 grams will shift the mass 404 by 1.25 inches will change the swing weight by 0.1.
In one example, the mass 404 has a weight of 4 grams with an added weight of 2 grams located in the club head 14 to be a counter balance in the golf club 10. The counter balance for the adjustable mass 404 in the butt portion of the shaft to the club head 14 is a ratio of about 2:1, for every 2 grams of weight added to the butt portion of the shaft, 1 additional gram must be added to the club head 14. In other embodiments, the adjustable mass 404 in the butt portion of the shaft 22 can have a weight of 6 grams and the club head 14 can have a weight of 3 grams. This counter balance ratio of 2:1 will help maintain the same swing weight of the golf club.
In other embodiments, the adjustment assembly 408 can incorporate components and aspects of the adjustable length shaft assembly 200, 300 to adjust the position and retain the mass 404 within the shaft 22. For example, the mass 404 can be formed of or include an elastic material that can be deformed to retain the mass 404 at a desired position within the shaft 22. As another example, the mass 404 can include a cam portion 368 that rotates within a channel 364 in the shaft, the cam portion 368 rotating between a position where the mass 404 can be axially moved within the shaft 22 and a different position where the cam portion 368 engages one or more cam surfaces 372 to retain the mass 404 at a desired position within the shaft 22. In these examples of embodiments, the distance that the mass 404 can be axially adjusted within the shaft 22 can be limited to less than the entire length of the shaft 22, as the mass 404 can be keyed to the axial slot 134 or positioned at the end of the member 320.
In other embodiments, aspects of the adjustable mass assembly 400 can be incorporated into a golf club 10 in combination with the adjustable length shaft assembly 100, 200, 300 disclosed above. For example, each adjustable length shaft assembly 100, 200, 300 can have a nested screw assembly to separately adjust shaft length and mass 404 position within the shaft.
As an example, the screw head 104 and screw 140 of the adjustable length shaft assembly 100 can receive a second screw (not shown) that is nested within. Rotation of the screw 140 adjusts the club length, while rotation of only the second screw adjusts the position of the mass 404 within the club shaft. Generally, the screw head 104 is received in the well 224, and a biasing member applies a biasing force on the screw head 104 in a direction 256, 376 away from the retainer 112. When biased, the screw 140 and the second screw can rotate together to adjust the club length. To adjust the position of the mass 404 within the club shaft, the user can apply a downward force in the direction 260, 380 (see
In embodiments of the golf club 10 that include the adjustable mass 404 of the adjustable mass assembly 400, the golf club 10 can include one or more removable or adjustable weights provided in the club head 14. The adjustable mass 404 and adjustable weights in the club head 14 can together adjust attributes of the golf club 10, such as moment of inertia, total weight, and swing weight.
In other embodiments of the golf club 10 that includes the adjustable mass 404, the mass 404 can be moved within the club shaft 22 (and/or 120) to adjust swing weight while maintaining total weight. For example, by moving the adjustable mass 404 closer to the grip end 50, the swing weight can decrease while maintaining the same total weight. By moving the adjustable mass 404 closer to the club head 14, the swing weight can increase while maintaining the same total weight.
In one or more other examples of embodiments of the golf club 10 that includes the adjustable mass 404 of the adjustable mass assembly 400, the adjustable mass 404 can be moved within the club shaft 22 (and/or 120) to adjust moment of inertia while maintaining total weight. Generally, by moving the adjustable mass 404 closer to the club head 14, the moment of inertia can increase while maintaining the same total weight. By moving the adjustable mass 404 within the club shaft 22 (and/or 120), the moment of inertia can be adjusted or customized to a golfer's profile (e.g., swing style (upright, flat, etc.), strength, height, arm length, swing speed, swing tempo) in order to achieve a desired shot shape or dispersion pattern without substantially impacting total weight.
It should be appreciated that the adjustable mass 404 can be used to adjust mass distribution relative to a center of rotation of an individual golfer's golf swing. By adjusting the mass 404 closer to or further away from the center of rotation of a given golf swing, club delivery to a golf ball can be improved. For example, adjusting the mass 404 can improve consistency of an angle of attack, swing path, or swing direction towards the golf ball. This in turn can result in more consistent contact between the club head 14 and the golf ball.
In addition, it should be appreciated that the adjustable mass 404 can be used to adjust launch angle and/or ball flight of a golf ball after contact with the golf club 10. A golfer can desire to change launch angle or golf ball trajectory based on changes to swing mechanics, weather conditions, and/or course conditions. For example, the adjustable mass 404 can be moved within the club shaft to a first position to lower a launch angle or lower a golf ball trajectory in windy weather conditions and reduce the effect of wind on the golf ball after contact. As another example, the adjustable mass 404 can be used to lower a launch angle or lower a golf ball trajectory on a links style golf course or similar course conditions where the golfer benefits from the golf ball rolling at the end of the ball flight. Similarly, the adjustable mass 404 can be moved within the club shaft to a second position to raise a launch angle or increase a golf ball trajectory.
In other embodiments, the mass 404 can be used to locally change or increase shaft stiffness along a portion, up to the entirety, of the shaft 22 (and/or shaft 120). Shaft stiffness is measured with equipment that oscillates the shaft and measures a frequency in cycles per minute (CPM). Shafts that do not bend very easily are considered to have a stiff flex and have a high frequency, while shafts that do bend easily are considered to have a softer flex and have a lower frequency. By adjusting the position of the mass 404 within the shaft 22, 120 closer to the club head 14, the measured CPM is reduced, resulting in a softer or reduced shaft stiffness. Conversely, adjusting the position of the mass 404 within the shaft 22, 120 further away from the club head 14 increases the measured CPM, resulting in a firmer or increased shaft stiffness. A golfer can desire to change shaft stiffness based on optimizing shaft performance in view of the golfer's profile (e.g., swing style (upright, flat, etc.), strength, height, arm length, swing speed, swing tempo), changes to swing mechanics, weather conditions, and/or course conditions.
It should be appreciated that the adjustable mass 404 can be used with one or more other adjustable aspects of a golf club 10 in addition to the adjustable length shaft disclosed herein. For example, the adjustable mass 404 can be used with an adjustable club loft, an adjustable club lie, an adjustable face angle at address (e.g., open, square, closed), and/or adjustable weights on a club head 14 to improve customization to the golfer's profile (e.g., swing style (upright, flat, etc.), strength, height, arm length, swing speed, swing tempo).
The method of manufacturing the golf club 10 described herein is merely exemplary and is not limited to the embodiments presented herein. The method can be employed in many different embodiments or examples not specifically depicted or described herein. In some embodiments, the processes of the method described can be performed in any suitable order. In other embodiments, one or more of the processes can be combined, separated, or skipped.
The adjustable length shaft assembly 100, 200, 300, 500 has certain advantages over the known art. For example, the adjustable length shaft assembly 100, 200, 300, 500 is not visible from an exterior of the golf club. The grip 34 is attached and substantially overlaps the second shaft 120, while a portion of the first shaft 22 is received by the second shaft 120. Since the adjustable length shaft assembly 100, 200, 300, 500 and the second shaft 120 are not generally visible from the exterior of the golf club 10, the golf club 10 is more visually appealing and looks more like a traditional golf club 10. In addition, the adjustable length shaft assembly 100, 200, 300, 500 is lighter in weight, reducing the effect the assembly has on both swing weight and total weight of the golf club 10. Further, the adjustable length shaft assembly 100, 200, 300, 500 allows for adjustment of the club length while maintaining the orientation of the grip 34 (i.e., it does not change the rotational position of the grip 34). The adjustable length shaft assembly 100, 200, 300 also allows for adjustment of the club length with a single tool, such as a torque wrench. The single tool can also be used to adjust other aspects of the golf club, such as weights on the club head 14, club loft, club lie, club face angle, and/or to replace the shaft 22. In addition, the adjustable length shaft assembly 100, 200, 300, 500 allows the shaft length of the golf club 10 to be customized to a golfer's profile, such as a golfer's height, arm length, and/or natural address position.
The adjustable length shaft assembly 800 has advantages similar to the advantages of the adjustable length shaft assembly 100, 200, 300, and 500 described above, and further advantages over the known art. For example, the adjustable length shaft assembly 800 reduces the side to side movement or radial movement between the first shaft 22 and the second shaft 120 by at least 70%. The nodal protrusions of the insert 828 and the retainer 812 improves the concentricity of the first shaft 22 within the second shaft 120. Further, the cutting operation between the threaded screw 140 and the ribs 834 of the insert 828 provides a secured fit between the threaded screw 140 and the insert 828 thereby reducing side to side or radial movement between the first shaft 22 and the second shaft 120. The alignment member 844 also provides an additional means of improving the concentricity of the first shaft 22 within the second shaft 120 to minimize misalignment and allow the first shaft 22 to freely translate within the second shaft 120 during operation of the adjustable length shaft assembly 800.
The adjustable mass assembly 400 has certain advantages over the known art. For example, by adjusting the mass 404 within the club shaft 22 (and/or shaft 120), the swing weight of the club can be adjusted while maintaining total weight, the moment of inertia can be adjusted while maintaining total weight, and/or the shaft stiffness can be adjusted. In addition, the golf ball trajectory can be adjusted after contact can be adjusted, which can be desirable for different course conditions, weather conditions, or mechanical changes to a golfer's swing. Further, adjusting the mass 404 within the club shaft 22 (and/or shaft 120) adjusts the mass distribution of the golf club 10 relative to a center of rotation of a golfer's golf swing, improving consistency of the angle of attack, swing path, and/or swing direction towards the golf ball, resulting in more consistent contact between the club head 14 and the golf ball.
It should be appreciated that the advantages are provided for purposes of an example, and are not inclusive or limiting.
Replacement of one or more claimed elements constitutes reconstruction and not repair. Additionally, benefits, other advantages, and solutions to problems have been described with regard to specific embodiments. The benefits, advantages, solutions to problems, and any element or elements that can cause any benefit, advantage, or solution to occur or become more pronounced, however, are not to be construed as critical, required, or essential features or elements of any or all of the claims, unless such benefits, advantages, solutions, or elements are expressly stated in such claims.
As the rules to golf can change from time to time (e.g., new regulations can be adopted or old rules can be eliminated or modified by golf standard organizations and/or governing bodies such as the United States Golf Association (USGA), the Royal and Ancient Golf Club of St. Andrews (R&A), etc.), golf equipment related to the apparatus, methods, and articles of manufacture described herein can be conforming or non-conforming to the rules of golf at any particular time. Accordingly, golf equipment related to the apparatus, methods, and articles of manufacture described herein can be advertised, offered for sale, and/or sold as conforming or non-conforming golf equipment. The apparatus, methods, and articles of manufacture described herein are not limited in this regard.
The above examples can be described in connection with a wood-type golf club, a fairway wood-type golf club, a hybrid-type golf club, an iron-type golf club, a wedge-type golf club, or a putter-type golf club. Alternatively, the apparatus, methods, and articles of manufacture described herein can be applicable to other type of sports equipment such as a hockey stick, a tennis racket, a fishing pole, a ski pole, etc.
Moreover, embodiments and limitations disclosed herein are not dedicated to the public under the doctrine of dedication if the embodiments and/or limitations: (1) are not expressly claimed in the claims; and (2) are or are potentially equivalents of express elements and/or limitations in the claims under the doctrine of equivalents.
Clause 1. A golf club comprising: a first shaft coupled to a club head; a second shaft configured to slidably engage a portion of the first shaft; a grip coupled to the second shaft; and an adjustable length shaft assembly at least partially positioned within the second shaft and configured to permit a portion of the first shaft to slide in relation to the second shaft, the adjustable length shaft assembly comprising: an insert coupled to an axial end face of the first shaft, the insert comprising a threaded aperture; and an adjustment member comprising a threaded screw configured to threadably engage with the threaded aperture of the insert, the adjustment member configured to rotate and the insert configured to travel along the adjustment member as the adjustment member rotates to allow the first shaft to slide in relation to the second shaft to adjust the length of the golf club; wherein the grip is restricted from rotation about the first shaft or the second shaft as the first shaft slides in relation to the second shaft.
Clause 2. The golf club of clause 1, wherein the adjustable length shaft assembly includes a socket configured to receive a tool.
Clause 3. The golf club of clause 1, wherein an inner surface of the second shaft and an outer surface of the insert comprise a shape capable of restricting rotational motion between the second shaft and the insert.
Clause 4. The golf club of clause 3, wherein the inner surface of the second shaft and the outer surface of the insert comprise a hexagonal cross sectional shape.
Clause 5. The golf club of clause 1, wherein an outer surface of the insert comprises a plurality of nodal protrusions.
Clause 6. The golf club of clause 1, wherein an inner surface of the insert comprises one or more ribs that engage the adjustment member.
Clause 7. The golf club of clause 6, wherein a diameter of the threaded screw is greater than an opening diameter between the one or more ribs.
Clause 8. The golf club of clause 1, wherein the adjustment member is received by a retainer configured to be static with respect to the second shaft and allow the rotation of the adjustment member.
Clause 9. The golf club of clause 8, wherein the retainer comprises one or more pegs that are configured to be received by one or more apertures disposed on the second shaft.
Clause 10. The golf club of clause 1, wherein first shaft is received by an alignment member positioned near a first end of the second shaft and configured improve the concentricity of the first shaft within the second shaft.
Clause 11. A golf club comprising: a first shaft coupled to a club head; a second shaft configured to slidably engage a portion of the first shaft; a grip coupled to the second shaft; and an adjustable length shaft assembly at least partially positioned within the second shaft and configured to permit a portion of the first shaft to slide in relation to the second shaft, the adjustable length shaft assembly comprising: an insert coupled to an axial end face of the first shaft, the insert comprising a threaded aperture; an adjustment member comprising a threaded screw configured to threadably engage with the threaded aperture of the insert, the adjustment member configured to rotate and the insert configured to travel along the adjustment member as the adjustment member rotates to allow the first shaft to slide in relation to the second shaft to adjust the length of the golf club; and a retainer coupled to a butt end of the second shaft and configured to receive the adjustment member, the retainer configured to be static with respect to the second shaft and allow for the rotation of the adjustment member; wherein the insert is positioned away from the retainer in an expended configuration, and insert abuts the retainer in a fully contracted configuration; wherein the grip is restricted from rotation about the first shaft or the second shaft as the first shaft slides in relation to the second shaft.
Clause 12. The golf club of clause 11, wherein the adjustable length shaft assembly includes a socket configured to receive a tool.
Clause 13. The golf club of clause 11, wherein an inner surface of the second shaft and an outer surface of the insert comprise a shape capable of restricting rotational motion between the second shaft and the insert.
Clause 14. The golf club of clause 13, wherein the inner surface of the second shaft and the outer surface of the insert comprise a hexagonal cross sectional shape.
Clause 15. The golf club of clause 11, wherein an outer surface of the insert comprises a plurality of nodal protrusions.
Clause 16. The golf club of clause 11, wherein an outer surface of the retainer comprises a plurality of nodal protrusions.
Clause 17. The golf club of clause 11, wherein an inner surface of the insert comprises one or more ribs that engage the adjustment member.
Clause 18. The golf club of clause 17, wherein a diameter of the adjustment member is greater than an opening diameter between the one or more ribs.
Clause 19. The golf club of clause 11, wherein first shaft is received by an alignment member positioned near a first end of the second shaft and configured improve the concentricity of the first shaft within the second shaft.
Clause 20. The golf club head of clause 19, wherein the alignment member comprises one or more pegs that are configured to be received by one or more apertures disposed on the second shaft.
Clause 21. The golf club of clause 11, wherein the insert engages a portion of the first shaft to define an engagement length; wherein the engagement length is 5.0 inch.
Clause 22. The golf club of clause 11, wherein an outer surface of the retainer comprises a plurality of nodal protrusions.
Clause 23. The golf club of clause 11, wherein the outer surface of the retainer comprises a hexagonal cross sectional shape.
Clause 24. The golf club of clause 11, wherein the second shaft is formed from nylon 66 with a 30% carbon fiber filler material.
Clause 25. The golf club of clause 11, wherein the insert and the first shaft move together as the adjustment member rotates.
Clause 26. The golf club of clause 15, wherein the nodal protrusions of the insert abut an inner surface of the second shaft.
Clause 27. The golf club of clause 22, wherein the nodal protrusions of the retainer abut an inner surface of the second shaft.
Clause 28. The golf club of clause 17, wherein the threaded screw comprises a diameter; wherein the one or more ribs define an opening diameter; wherein the threaded screw diameter is greater than the opening diameter between the one or more ribs.
Clause 29. The golf club of clause 28, wherein the threaded screw diameter is 0.25 inch and the opening diameter between the one or more ribs is 0.242 inch.
Clause 30. The golf club of clause 11, wherein the insert is permanently coupled to the axial end face of the first shaft.
Clause 31. The golf club of clause 30, wherein the insert is coupled to the axial end face of the first shaft with an adhesive.
Various features and advantages of the disclosure are set forth in the following claims.
This is a continuation of U.S. Nonprovisional patent application Ser. No. 16/539,890, filed on Aug. 13, 2019, which claims the benefit of U.S. Provisional Patent Application No. 62/718,298, filed on Aug. 13, 2018, and is a continuation-in-part of U.S. Nonprovisional patent application Ser. No. 15/165,889, filed on May 26, 2016, and is issued as U.S. Pat. No. 10,675,521 on Jun. 9, 2020, which claims the benefit of U.S. Provisional Patent Application No. 62/167,833, filed on May 28, 2015, U.S. Provisional Patent Application No. 62/220,013, filed on Sep. 17, 2015, U.S. Provisional Patent Application No. 62/258,837, filed on Nov. 23, 2015, and U.S. Provisional Patent Application No. 62/303,429, filed on Mar. 4, 2016. The contents of all disclosures above are incorporated fully herein by reference.
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| Number | Date | Country | |
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| Parent | 16539890 | Aug 2019 | US |
| Child | 17652061 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 15165889 | May 2016 | US |
| Child | 16539890 | US |
