Stick weight support

Abstract

An embodiment of a stick weight assembly used within a shaft of a golf club, the shaft including an inner shaft surface defining a shaft bore, the stick weight assembly including a stick weight and a stick weight support, the stick weight being a rod sized to be inserted into the shaft bore, having an upper end and a lower end, the upper end defining an outer upper end shape, and including a disk sized to be connected to the lower end of the rod and abut against the tip of the shaft, the stick weight support including a first end, a second end, and a first portion having an outer surface defining a dome, the dome being sized to be inserted into the shaft, and a second portion connected to the first portion, the second portion including an outer surface and a plurality of ridges sized to project outwardly from the outer surface and engage the inner shaft surface. The stick weight support defines a cavity extending from the second end toward the first end, the cavity being configured to receive the upper end of the rod.

Description

Technical Field

[0001] (Cross-Reference Priority) This application claims the benefit of U.S. Provisional Application No. 63 / 387,072, filed Dec. 12, 2022; U.S. Provisional Application No. 63 / 377,510, filed Sep. 28, 2022; and U.S. Provisional Application No. 63 / 366,130, filed Jun. 9, 2022, the contents of which are hereby incorporated by reference in their entirety.

[0002] The present disclosure generally relates to golf equipment, and more particularly to golf clubs.

Background Art

[0003] Typical golf club heads may include weight features to improve the center of gravity (CG) and moment of inertia (MOI) of the club head. These features are disposed throughout the club head and, depending on the club head, may be disposed within the hosel of the club head. One type of weight feature is a tip weight, which is a short cylindrical weight. The tip weight is disposed within the hosel and abuts against the tip end of the shaft. Another type of weight feature is a stick weight, which is an elongated cylindrical weight. Most of the stick weight is disposed within the shaft. Because the area occupied by the stick weight within the hosel of the club head is small, the stick weight can be a desirable weight feature. Thus, the stick weight can increase the insertion depth of the shaft and can provide additional surface area for joining the shaft and the hosel of the club head. Further, in contrast to conventional tip weights, the area occupied by the stick weight within the hosel is small, so the length and outer diameter of the hosel can be reduced. This ensures a discretionary mass that can be redistributed throughout the club head. This redistribution can result in a club head with a more favorably distributed weight, a lower CG along the Y-axis, and a larger MOI, i.e., a more forgiving club head. However, prior art stick weights are not adequately supported within the shaft, which can cause undesirable vibrations. Such vibrations can result in an undesirable sound and / or feel at impact. Further, such vibrations can cause the stick weight to damage the inner portions of the shaft and hosel and, more generally, can damage the stick weight itself.

[0004] Known methods for damping unwanted vibrations involve providing a simple fork-like structure at the end of a steel shaft stick weight, as shown in FIG. 2. The fork-like structure projects from the end of the stick weight disposed within the shaft and presses against the inner surface of the shaft to provide support. However, since this fork-like structure is not versatile, it is difficult to apply to various shaft inner diameters. Further, due to vibrations as described above, there is a possibility that the upper part of the fork-like structure breaks and moves freely within the shaft, in which case, unwanted knocking sounds and hitting sensations may occur. Another method for dealing with play is to dispense epoxy resin along the stick weight. This involves dispensing an excessive amount of epoxy resin along the length of the stick weight and within the hosel to prevent any movement. To successfully implement this method, it is necessary to carefully position the club head during the drying of the epoxy resin so that the epoxy resin remains securely in the desired position. This process lacks certainty, cannot be repeated in the same way, and increases the complexity and time required for assembly. Therefore, in the art, there is a need for a versatile stick weight assembly that can prevent vibrations within the shaft and can be attached to various shafts with different inner diameters.

Brief Description of the Drawings

[0005] The following drawings are provided to facilitate a further description of the embodiments.

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[0042] For simplicity and clarity of illustration, the drawings show general structural aspects, and well-known features and techniques may be omitted to avoid unnecessarily obscuring the present invention. Furthermore, the elements in the drawings are not necessarily drawn to scale. For example, for ease of understanding the embodiments of the present invention, the dimensions of some elements in the figures may be exaggerated relative to other elements. The same reference numerals in different figures indicate the same elements.

Mode for Carrying Out the Invention

[0043] In this specification, various embodiments of a stick weight assembly are described that can be easily placed within various shafts and further stabilize the stick weight within the shaft using a stick weight support (hereinafter referred to as the "SW support"). The stick weight assembly described herein enables the use of stick weights while ensuring ease of manufacture and improved durability. As described above, most of the stick weight is disposed within the shaft and only a small portion is present within the hosel bore, while conventional tip weights are disposed only within the hosel bore. Thus, the stick weight occupies only a small portion of the space required by conventional tip weights. This reduction in space provides freedom in the redesign of the golf club hosel, allowing the hosel to be shortened and the hosel outer diameter to be reduced. More specifically, the space secured by redesigning the hosel can be used to secure discretionary mass that can be redistributed to other locations on the club head. The secured discretionary mass can be redistributed throughout the golf club head. This can result in a golf club head with a larger moment of inertia (MOI) and a lower center of gravity (CG).

[0044] More specifically, the stick weight assembly has improvements and durability over tip weight assemblies and enables successful implementation of the stick weight assembly in various shafts having various inner diameters. By being able to successfully implement the stick weight assembly described herein, the hosel can be further shortened. The outer diameter of the hosel can be reduced by up to 0.040 inches and the height of the hosel can be reduced by up to 0.210 inches. By changing the dimensions of the hosel in this way, a mass of up to 13 grams can be secured. And the secured mass can be redistributed throughout the club head as desired to improve performance characteristics such as increasing the MOI and decreasing the CGy. As the MOI increases and the CG decreases, the ball speed increases overall, resulting in a longer carry distance.

[0045] The stick weight assembly described herein may be permanently disposed, in part, within the tip end of a golf club shaft. The stick weight assembly may include a stick weight and an SW support. Further, the stick weight may include a disk and a rod. The disk may abut the tip end of the shaft and the rod may extend into the shaft. The rod has a diameter smaller than the inner diameter of the shaft so as to be disposed within the shaft. The disk may be fixed in the vicinity of the tip end of the shaft, but due to the difference between the diameter of the rod and the diameter of the shaft, the rod may still rattle within the shaft. To address rattling, various embodiments of SW supports have been developed.

[0046] In some embodiments, the stick weight may be formed from a single material. In such embodiments, the stick weight may be selected from the group consisting of aluminum, aluminum alloy, stainless steel, stainless steel alloy, tungsten, and tungsten alloy. In an exemplary embodiment, the stick weight is a tungsten alloy. In other embodiments, the material of the stick weight may have a stick weight density. In such embodiments, the stick weight density may be from 2 Mg / m 3 to 20 Mg / m 3 . In an exemplary embodiment, the stick weight density is 10.68 Mg / m 3 .

[0047] In some embodiments, the SW support may be formed from a single material. In such embodiments, the SW support may be formed of a flexible TPE material having a Shore A hardness of 10 to Shore A hardness of 90. In some embodiments, this hardness may be Shore A hardness of 10 to Shore A hardness of 20, Shore A hardness of 20 to Shore A hardness of 30, Shore A hardness of 30 to Shore A hardness of 40, Shore A hardness of 40 to Shore A hardness of 50, Shore A hardness of 50 to Shore A hardness of 60, Shore A hardness of 60 to Shore A hardness of 70, Shore A hardness of 70 to Shore A hardness of 80, or Shore A hardness of 80 to Shore A hardness of 90.

[0048] In some embodiments, the flexible TPE material may be selected from the group consisting of thermoplastic styrene block copolymers (TPS or TPE-s), thermoplastic polyolefin elastomers (TPO or TPE-o), and thermoplastic vulcanizates (TPV or TPE-v). The flexible TPE material may have a much greater elastic limit than the stick weight material. The flexible TPE material allows the SW support to be compressed when the SW support is inserted into the tip of the shaft. Thereafter, the flexible TPE material expands back to its original shape, creating an interference fit between the stick weight assembly and the inner surface of the shaft. The interference fit between the SW support and the inner surface of the shaft, as well as the mechanical properties of the flexible TPE material, support the stick weight and can dampen the vibrations that occur during impact between the club head and the ball.

[0049] In other embodiments, the stick weight may be formed from a first material and a second material. The first material may be the flexible TPE material described above. The second material may be a metal. The second material may be selected from the group consisting of aluminum, aluminum alloy, stainless steel, stainless steel alloy, tungsten, or tungsten alloy. In a further embodiment, the stick weight may be formed from a single material that is a combination of aluminum, stainless steel, tungsten, and the flexible TPE material.

[0050] The SW support described herein may be designed to accommodate various shafts and stick weights. As described in more detail below, the SW support is designed to fit snugly within various shafts having various inner diameters, being appropriately compressed. As described above, the SW support can stabilize the stick weight when disposed within the shaft. Thus, the SW support can prevent unwanted rattling and improve the durability of the stick weight assembly. The SW support can further eliminate the need for epoxy resin and provide a quick and easily repeatable method for installing the stick weight assembly within the shaft. Improvements in the installation method, as well as increased durability, enable the use of the stick weight assembly with various shafts having different shaft diameters. For example, the SW assembly can be used not only with graphite and steel shafts for irons, but also with shafts for woods, hybrids, drivers, and putters.

[0051] Since the stick weight assembly can be used with various shafts, the insertion depth of the shaft can be increased, providing additional surface area for the joint between the shaft and the hosel of the clubhead. Further, in contrast to conventional tip weights, since the area occupied by the stick weight within the hosel is small, the length of the hosel can be shortened. The discretionary mass thus secured can be redistributed throughout the clubhead. The secured discretionary mass can be used to increase the MOI and create a more forgiving clubhead. I. Graphite Stick Weight Assembly

[0052] The golf club described in this specification may include a club head, a graphite shaft, a graphite stick weight assembly, and a grip. The club head may include a body having a striking face, a toe, a heel opposite the toe, a sole, and a topline or crown opposite the sole. The club head may further include a hosel. The hosel may be located near the heel of the club. The hosel may include a hosel bore. The hosel bore may be located at the upper edge of the hosel and may include a bore that extends downward toward the body of the club head. The shaft may include a shaft inner surface that defines a shaft bore, a shaft tip portion proximate to the club head, and a grip end portion proximate to the grip. The shaft tip portion may be received within the hosel bore. The shaft may define a longitudinal axis that extends from the geometric center of the tip portion to the geometric center of the grip end portion. The shaft may be a hollow cylinder, and its diameter may vary. The diameter is smallest at the tip portion and largest at the grip end portion. The shaft may define an opening configured to receive the stick weight assembly in the vicinity of the tip portion.

[0053] The stick weight assembly may include a stick weight and an SW support. In some embodiments, the stick weight and the SW support may be integrated. In other embodiments, the stick weight and the SW support may be separate components. In such embodiments, the SW support may be placed on the stick weight after being formed as a separate component, or the SW support may be directly placed on the stick weight, together with or cross-linked with the stick weight, or overmolded or injection molded around the stick weight.

[0054] The SW support described in detail below can prevent unwanted rattling and improve the durability of the stick weight assembly. Further, the SW support can eliminate the need for epoxy resin and provide a more rapid and easy repeatable installation method. With the improvement in durability and installation method, the stick weight assembly can be used with various graphite shafts known to have various shaft inner diameters. Accordingly, the stick weight assembly can add mass to the hosel portion of the golf club while keeping the occupied space in the hosel small. The small occupied space allows the hosel to be shortened, thereby securing discretionary mass and redistributing the secured discretionary mass throughout the clubhead. The redistribution of the secured discretionary mass results in a higher degree of freedom in adjusting the MOI and CG of the golf club. This can improve the characteristics of the golf club head, such as the launch angle, forgiveness, spin, and ball speed of the club head. 1. Graphite Stick Weight

[0055] The stick weight and corresponding SW support may be of various designs as described below. In an exemplary embodiment, the stick weight is of a cylindrical design. Referring to FIGS. 3A-5D, the stick weight 330 or 430 may include a cylindrical rod 303 or 403 (referred to herein as a "rod") and a disk 304 or 404. The rod 303 or 403 may include an upper end 301 or 401 and a lower end 302 or 402. As shown in FIGS. 3A, 4A, and 5A, the lower end of the rod 302 or 402 may be connected to the disk 304 or 404. The stick weight 330 may be received within the shaft 20 near the tip 10 of the shaft such that the upper end of the rod 301 or 401 is disposed within the shaft 20 and the disk 304 or 404 abuts the tip 10 of the shaft. The rod 303 or 403 may be fully received within the shaft 20, and the disk 304 or 404 may project from the tip 10 of the shaft into the hosel 40.

[0056] Rod 303 or 403 may define a rod length measured from the upper end 301 or 401 to the lower end 302 or 402 along the longitudinal axis of the shaft 20. The rod length may be from 0.70 inches to 2.70 inches. In some embodiments, the rod length may be from 0.70 inches to 0.90 inches, from 0.90 inches to 1.10 inches, from 1.10 inches to 1.30 inches, from 1.30 inches to 1.50 inches, from 1.50 inches to 1.70 inches, from 1.70 inches to 1.90 inches, from 1.90 inches to 2.10 inches, from 2.10 inches to 2.30 inches, from 2.30 inches to 2.50 inches, or from 2.50 inches to 2.70 inches. In some embodiments, the rod length may be less than 2.70 inches, less than 2.40 inches, less than 2.10 inches, less than 1.80 inches, less than 1.50 inches, less than 1.20 inches, or less than 0.90 inches. In an exemplary embodiment, the rod length is 2.11 inches. In another exemplary embodiment, the rod length is 0.90 inches. In another exemplary embodiment, the rod length is 1.060 inches. The rod length can affect both the weight and durability of the stick weight 330. The longer the rod length, the greater the weight and the more prone to breakage. When the rod length is long, the vibration force transmitted from the shaft 20 to the stick weight 330 during impact increases. When the vibration force is large, the stick weight 330 may be damaged. However, the SW supports 310, 320, 410 described below can provide additional support means. Such an SW support creates an interference fit between the shaft bore and the stick weight 330. Further, as will be described in more detail below, depending on the design and material of the SW supports 310, 320, 410, the SW supports 310, 320, 410 can absorb some, if not all, of the vibrations generated during impact, so that if desired, longer and heavier stick weights can be used.

[0057] The stick weight assembly 300 or 400 may have a weight. As described above, the rod length can be a major factor in the weight of the stick weight assembly. The weight may be from 1 gram to 15 grams. The longer the rod length of the stick weight 330, the greater the weight. In some embodiments, the weight may be from 1 gram to 3 grams, from 3 grams to 5 grams, from 5 grams to 7 grams, from 7 grams to 9 grams, from 9 grams to 11 grams, from 11 grams to 13 grams, or from 13 grams to 15 grams. In some embodiments, the weight may be less than 15 grams, less than 10 grams, or less than 5 grams. The size of the disk can also affect the weight, but to a lesser extent than the rod length.

[0058] The rod 303 or 403 may further define a rod diameter measured across the surface of the rod cross-section in a direction perpendicular to the longitudinal axis. The rod 303 or 403 may be sized to be inserted into the shaft tip. The rod diameter may be from 0.07 inches to 0.17 inches. In some embodiments, the rod diameter may be from 0.07 inches to 0.08 inches, from 0.08 inches to 0.09 inches, from 0.09 inches to 0.10 inches, from 0.10 inches to 0.11 inches, from 0.11 inches to 0.12 inches, from 0.12 inches to 0.13 inches, from 0.13 inches to 0.14 inches, from 0.14 inches to 0.15 inches, from 0.15 inches to 0.16 inches, or from 0.16 inches to 0.17 inches. In an exemplary embodiment, the rod diameter is 0.12 inches. The rod diameter may be selected such that the entire rod is disposed within the shaft bore. By being able to dispose the entire rod within the shaft bore, space within the hosel 40 is freed up, increasing the surface area for bonding and, if desired, allowing the hosel 40 to be shortened. Even in this case, the SW support can overcome the smaller diameter that results in an outer circumference of the cylindrical weight that is smaller than the outer circumference of the shaft. The SW support helps to "clamp" the rod and prevent rattling within the wide shaft.

[0059] As described above, the disk 304 or 404 may be connected to the lower end 302 or 402 of the rod and may be sized to abut against the shaft tip 10. The disk 304 or 404 may define a disk diameter. The disk diameter may be measured across the surface of the disk 304 or 404 in a direction perpendicular to the longitudinal axis. The disk diameter may be from 0.20 inches to 0.40 inches. In some embodiments, the disk diameter may be from 0.20 inches to 0.25 inches, from 0.25 inches to 0.30 inches, from 0.30 inches to 0.35 inches, or from 0.35 inches to 0.40 inches. In an exemplary embodiment, the disk diameter is 0.35 inches. In an exemplary embodiment, the disk diameter is 0.32 inches. The disk 304 or 404 may be sized to prevent the stick weight assembly 300 or 400 from being fully inserted into the shaft bore. This facilitates manufacturing and allows the stick weight assembly 300 or 400 to be quickly and consistently positioned within the shaft tip 10.

[0060] Furthermore, the disk 304 or 404 may define a disk thickness. The disk thickness may be measured along the longitudinal axis. The disk thickness may be from 0.025 inches to 0.125 inches. In some embodiments, the disk thickness may be from 0.025 inches to 0.050 inches, from 0.050 inches to 0.075 inches, from 0.075 inches to 0.100 inches, or from 0.100 inches to 0.125 inches. In an exemplary embodiment, the disk thickness is 0.070 inches. The disk thickness may be thick enough to provide the necessary support for the rod 303 or 403 and may also be thin enough to provide the necessary joint surface between the shaft tip 10 and the hosel bore. As described above, the disk 304 or 404 may be sized to prevent the stick weight assembly 300 or 400 from being fully inserted into the shaft bore. a) Cap-type stick weight support

[0061] Here, a cap - type stick weight support having a cavity with a shape complementary to the rod of the stick weight will be described. Further, the cap may include a raised portion to facilitate positioning the stick weight within the shaft. In some embodiments, the SW support 310 may have a cap - like shape. The cap - like SW support 310 (hereinafter also referred to as the "cap" or "cap - type SW support") sufficiently fixes the stick weight 330 within the shaft bore. The cap - type SW support 310 may be disposed at the upper end of the rod 301 or 401, and as shown in FIG. 3A, the stick weight 330 and the cap - type SW support 310 are disposed within the shaft 20. The cap - type SW support 310 may include a first end 314, a second end 315, and an outer surface 316. The cap - type SW support 310 further defines a cavity 317 that extends from the second end 315 towards the first end 314. The cavity 317 has a depth measurable along the longitudinal axis. The cavity 317 may be configured to receive the upper end of the rod 301 or 401. The cavity 317 may define a cavity shape complementary to the shape of the upper end of the rod.

[0062] The cap - type SW support 310 may further include an outer diameter, an inner diameter, a first portion 311, a second portion 312, and a thickness. The first portion 311 may include a dome. The dome guides the insertion of the cap - type SW support 310 into the shaft 20, and the rod is held in place by press - fitting / clamping, despite having a diameter smaller than the shaft inner diameter. The second portion 312 may include a cylindrical body that increases the engagement area between the inside of the shaft 20 and the cap - type SW support 310. The cap outer diameter and the cap inner diameter may be varied to accommodate various shaft inner diameters. The cap outer diameter and the cap inner diameter may further be selected such that the cap - type SW support 310 fits snugly between the upper end 301 or 401 and within the shaft bore.

[0063] The cap outer diameter of the cap-type SW support 310 may be measured across the second end 315 of the cap-type SW support 310 in a direction perpendicular to the longitudinal axis. The cap outer diameter may be from 0.10 inches to 0.30 inches. In some embodiments, the cap outer diameter may be from 0.10 inches to 0.15 inches, from 0.15 inches to 0.20 inches, from 0.20 inches to 0.25 inches, or from 0.25 inches to 0.30 inches. In an exemplary embodiment, the cap outer diameter is 0.18 inches. The cap outer diameter may be sized such that the outer surface 316 of the cap fits snugly with the inner surface of the shaft. More specifically, the cap outer diameter may be sized such that the cap can be inserted without applying excessive force, yet a press fit / clamping fit is formed between the cap and the inner surface of the shaft. The cap-type SW support 310 can prevent the rattling of the stick weight 330 by applying an outward force to the inner surface of the shaft.

[0064] The cap inner diameter may be measured across the cavity 317 in a direction perpendicular to the longitudinal axis. The cap inner diameter may be from 0.07 inches to 0.17 inches. In some embodiments, the cap inner diameter may be from 0.07 inches to 0.08 inches, from 0.08 inches to 0.09 inches, from 0.09 inches to 0.10 inches, from 0.10 inches to 0.11 inches, from 0.11 inches to 0.12 inches, from 0.12 inches to 0.13 inches, from 0.13 inches to 0.14 inches, from 0.14 inches to 0.15 inches, from 0.15 inches to 0.16 inches, or from 0.16 inches to 0.17 inches. In an exemplary embodiment, the cap inner diameter is 0.12 inches. The cap inner diameter may be sized such that the cavity 317 and the stick weight 330 fit tightly. The tension between the cavity 317 and the stick weight can further prevent the rattling of the stick weight within the shaft 20.

[0065] As described above and as shown in FIGS. 3B - 3C, the cap - type SW support 310 may include a first portion 311 and a second portion 312. The first portion 311 includes a dome, and the second portion 312 includes a cylinder. The first portion 311 may have a first portion height measurable from the lower end of the dome structure upward to the first end 314 of the cap - type SW support 310. The first portion height may be from 0.09 inches to 0.25 inches. In some embodiments, the first portion height may be from 0.09 inches to 0.11 inches, from 0.11 inches to 0.13 inches, from 0.13 inches to 0.15 inches, from 0.15 inches to 0.17 inches, from 0.17 inches to 0.19 inches, from 0.19 inches to 0.21 inches, from 0.21 inches to 0.23 inches, or from 0.23 inches to 0.25 inches. In an exemplary embodiment, the first portion height is 0.17 inches.

[0066] Furthermore, the second portion 312 may have a second portion height measurable from the lower end of the dome downward to the second end 315 of the cap - type SW support 310. The second portion height may be from 0.12 inches to 0.25 inches. In some embodiments, the second portion height may be from 0.12 inches to 0.13 inches, from 0.13 inches to 0.14 inches, from 0.14 inches to 0.15 inches, from 0.15 inches to 0.16 inches, from 0.16 inches to 0.17 inches, from 0.17 inches to 0.18 inches, from 0.18 inches to 0.19 inches, from 0.19 inches to 0.20 inches, from 0.20 inches to 0.21 inches, from 0.21 inches to 0.22 inches, from 0.22 inches to 0.23 inches, from 0.23 inches to 0.24 inches, or from 0.24 inches to 0.25 inches. In an exemplary embodiment, the second portion height is 0.19 inches. In another exemplary embodiment, the second portion height is 0.18 inches.

[0067] In some embodiments, as shown in FIG. 3B, the second portion 312 may further include a plurality of ridges 313 (hereinafter also referred to as "ridges") that protrude outwardly from the outer surface 316 of the cap-shaped SW support 310. The plurality of ridges 313 may be disposed proximate to the second end 315. The plurality of ridges 313 can contact the inner surface of the shaft to more securely support the stick weight 330. The plurality of ridges 313 may include from 2 to 15 ridges. In some embodiments, the plurality of ridges 313 may be 2 to 6 ridges, 6 to 11 ridges, or 11 to 15 ridges.

[0068] The plurality of ridges 313 may have a ridge shape, which may be considered as the cross-section of a plurality of ridges perpendicular to the longitudinal axis. The ridge shape may be selected from the group consisting of a triangle, a semi-circle, and an ellipse. The ridge shape provides a space for air to escape and can reduce the force required to insert the stick weight assembly 300 into the tip of the shaft. Further, the ridge shape makes the ridges more easily compressible as appropriate. To accommodate various shaft inner diameters, it may be desirable for the ridges to be compressed.

[0069] The length of the raised portion can be measured from the second end 315 upward to the end point of the raised portion in a direction parallel to the longitudinal axis. In some embodiments, the cap-type SW support 310 may have raised portions of various lengths. In other embodiments, the cap-type SW support 310 may have raised portions of a constant length. Regardless of whether the cap-type SW support 310 has raised portions of various lengths or raised portions of a constant length, the length of the raised portion may be from 0.10 inches to 0.20 inches. In some embodiments, the length of the raised portion is from 0.10 inches to 0.11 inches, 0.11 inches to 0.12 inches, 0.12 inches to 0.13 inches, 0.13 inches to 0.14 inches, 0.14 inches to 0.15 inches, 0.15 inches to 0.16 inches, 0.16 inches to 0.17 inches, 0.17 inches to 0.18 inches, 0.18 inches to 0.19 inches, or 0.19 inches to 0.20 inches. In an exemplary embodiment, the length of the raised portion is 0.145 inches. In another exemplary embodiment, the length of the raised portion is 0.165 inches. In some embodiments, the raised portion 313 may extend over the entire length of the second portion 312. In other embodiments, the raised portion 313 may extend beyond the second portion 312 and into the first portion 311. In other embodiments, the raised portion 313 may extend over a part of the second portion 312. The length of the raised portion may affect the magnitude of the force that the stick weight assembly 300 exerts on the shaft inner diameter.

[0070] As described above, the cap - type SW support 310 may be formed from a flexible TPE material. In an exemplary embodiment, the flexible TPE material may have a Shore A hardness of 60. The material of the cap - type SW support may have a much greater elastic limit than the material of the stick weight. As described above, the shaft diameter may be smallest at the tip and gradually increase towards the grip end. The material of the cap - type SW support may be easily compressed when the stick weight assembly 300 is inserted into the shaft tip 10 and then expand when the stick weight assembly 300 is further pushed into the shaft 20. The material of the cap - type SW support can further, as described above, slightly compress the raised portion 313 when the raised portion 313 is disposed within the shaft 20. The tight fit between the raised portion 313 and the shaft 20 supports the stick weight 330 and can dampen the vibrations generated during the impact between the club head and the ball. b) Fin - type stick weight support

[0071] Here, a fin - type stick weight support configured to be attached to the rod of a stick weight at a specific point will be described. The fin has an opening with a shape complementary to the outer diameter of the rod. In other embodiments, as shown in FIG. 4A, the SW support 320 may have a fin - like shape. The fin - like stick weight support 320 (hereinafter also referred to as "fin - type SW support") may include a plurality of fins 321 or 322, or disk - shaped members (hereinafter also referred to as "fins"). Each fin may include an upper surface, a lower surface, an outer edge 323, and a central opening 324. The fin - type SW support 320 may be injection - molded onto the rod 303 or 403 of the stick weight such that the rod 303 or 403 of the stick weight is disposed within the central opening 324, and the central opening 324 has a shape complementary to the cross - sectional shape of the rod. The outer edge 323 of each fin may contact the inner surface of the shaft. The stick weight 330 and the plurality of fins 321 or 322 may fit snugly within the shaft 20, preventing the stick weight 330 from rattling or moving within the shaft 20. More specifically, the fins may be designed to be bendable such that they are compressed during insertion and then expand to form a press - fit / clamp - fit between the fins and the inner surface of the shaft. Each fin 321 or 322 may further define a fin inner diameter corresponding to the rod diameter and a fin outer diameter corresponding to the shaft inner diameter.

[0072] The fin outer diameter can be measured in a direction perpendicular to the longitudinal axis. The fin outer diameter may be from 0.10 inches to 0.40 inches. In some embodiments, the fin outer diameter may be from 0.10 inches to 0.20 inches, from 0.20 inches to 0.30 inches, or from 0.30 inches to 0.40 inches. The fin outer diameter may be sized such that the fin and the inner surface of the shaft fit snugly. Each fin 321 or 322 can apply an outward force against the inner surface, forming a press - fit / clamp - fit between the fin and the inner surface of the shaft to prevent rattling of the stick weight 330.

[0073] The fin inner diameter can be measured in a direction perpendicular to the longitudinal axis. The fin inner diameter can be from 0.05 inches to 0.35 inches. In some embodiments, the fin inner diameter can be from 0.05 inches to 0.15 inches, from 0.15 inches to 0.25 inches, or from 0.25 inches to 0.35 inches. The fin inner diameter can be sized such that the fin 321 or 322 fits snugly with the stick weight 330. Engagement of the fin 321 or 322 with the stick weight 330 can further prevent rattling of the stick weight 330 within the shaft 20.

[0074] Each fin 321 or 322 of the plurality of fins can define a fin thickness. The fin thickness can be measured in a direction parallel to the longitudinal axis. In some embodiments, the fin thickness can vary. In some embodiments, the fin 321 or 322 can include one flat surface and one tapered surface, where the tapered surface is the upper surface and the flat surface is the lower surface. In other embodiments, the fin 321 or 322 can include one flat surface and one tapered surface, where the flat surface is the upper surface and the tapered surface is the lower surface. In other embodiments, the fin 321 or 322 can include two tapered surfaces. In other embodiments, the fin thickness can be constant. The fin thickness can be from 0.01 inches to 0.05 inches. In some embodiments, the fin thickness can be from 0.01 inches to 0.02 inches, from 0.02 inches to 0.03 inches, from 0.03 inches to 0.04 inches, or from 0.04 inches to 0.05 inches.

[0075] In some embodiments, the fin 321 or 322 may comprise a quasi-circular ring, with a slit provided between two adjacent portions of the ring. In another embodiment, the fin 321 or 322 may comprise a continuous ring with a partial slit. The partial slit may extend from the outer diameter towards the central opening 324 and terminate at a point between the inner and outer diameters. The slit allows the stick weight assembly 300 to be more easily inserted into the shaft tip 10, and when disposed within the shaft 20, the fin 321 or 322 can return to its original shape.

[0076] The fin 321 or 322 may be disposed as appropriate along the length of the stick weight 330. The plurality of fins may include 1 to 5 fins. In one embodiment, as seen in FIG. 4A, the first fin 321 may be disposed near the upper end of the rod 301 or 401, and the second fin 322 may be disposed near the lower end of the rod 302 or 402. The fins 321 and 322 may be fixed to the stick weight 330 by various means including injection molding, epoxy resin, etc.

[0077] As described above, the fin 321 or 322 may be formed from a flexible TPE material. In an exemplary embodiment, the flexible TPE material may have a Shore A hardness of 60. The material of the fin may have a greater elastic limit than the material of the stick weight. The material of the fin allows the fin 321 or 322 to be compressed when the stick weight assembly 300 is inserted into the shaft tip 10, and to expand when the stick weight assembly 300 is further pushed into the shaft 20. The tight fit between the fin and the shaft 20 supports the stick weight 330 and can attenuate the vibrations generated during impact. c) Sleeve-type stick weight support

[0078] Here, a sleeve-type stick weight support configured to be disposed on a rod will be described. The sleeve may include a ridge for further centrally disposing the stick weight within the shaft. Referring to FIGS. 5A-5D, in some embodiments, the SW support 410 may have a sleeve shape. The sleeve-type SW support 410 is hereinafter also referred to as the "sleeve" or the "sleeve-type SW support". In some embodiments, the sleeve-type SW support 410 may be overmolded on the stick weight 430. In other embodiments, the sleeve-type SW support 410 may be separately molded and then disposed on the stick weight 430. The sleeve-type SW support may include a first portion 411, a second portion 412, a plurality of ridges 413, a plurality of holes 418, and a plurality of recesses 419. The sleeve-type SW support may further include a first end 414, a second end 415, and an outer surface 416. Further, the sleeve-type SW support may define a cavity 417 that extends from the second end 415 of the sleeve-type SW support toward the first end 414 of the sleeve-type SW support. The cavity 417 may have a cavity depth measurable along the longitudinal axis. The cavity 417 may be configured to receive the upper end of the rod 401. The cavity 417 may further have a cavity shape that conforms to the shape of the rod.

[0079] The sleeve-type SW support 410 may further include a sleeve length, a sleeve outer diameter, a sleeve inner diameter, and a sleeve thickness. The sleeve outer diameter and the sleeve inner diameter may be varied to accommodate various shafts having different diameters. The sleeve outer diameter and the sleeve inner diameter may be selected such that the sleeve fits snugly over the stick weight 430 and within the shaft 20.

[0080] The sleeve length can be measured in a direction parallel to the longitudinal axis. In some embodiments, the sleeve length can be from 0.80 inches to 2.60 inches. In some embodiments, the sleeve length can be from 0.80 inches to 1.00 inches, from 1.00 inches to 1.20 inches, from 1.20 inches to 1.40 inches, from 1.40 inches to 1.60 inches, from 1.60 inches to 1.80 inches, from 1.80 inches to 2.00 inches, from 2.00 inches to 2.20 inches, from 2.20 inches to 2.40 inches, or from 2.40 inches to 2.60 inches. In some embodiments, the sleeve length can be less than 2.60 inches, less than 2.40 inches, less than 2.20 inches, less than 2.00 inches, less than 1.80 inches, less than 1.60 inches, less than 1.40 inches, less than 1.20 inches, or less than 1.00 inches. The sleeve length can directly affect the ability to attenuate the vibrations that occur when the clubhead impacts the golf ball. In some embodiments, the sleeve length can be selected to be related to the rod length, and the rod length can be about 3% longer, about 5% longer, about 7% longer, about 9% longer, about 11% longer, about 13% longer, about 15% longer, or about 17% longer than the sleeve length.

[0081] The sleeve outer diameter can be measured across the second end 415 of the sleeve in a direction perpendicular to the longitudinal axis. The sleeve outer diameter can be from 0.075 inches to 0.225 inches. In some embodiments, the sleeve outer diameter can be from 0.075 inches to 0.085 inches, from 0.085 inches to 0.105 inches, from 0.105 inches to 0.125 inches, from 0.125 inches to 0.145 inches, from 0.145 inches to 0.165 inches, from 0.165 inches to 0.185 inches, from 0.185 inches to 0.205 inches, or from 0.205 inches to 0.225 inches. In an exemplary embodiment, the sleeve outer diameter is 0.160 inches. The sleeve outer diameter can be sized such that the outer surface of the sleeve and the inner surface of the shaft fit snugly. The sleeve prevents the rattle of the stick weight 430 by applying an outward force to the inner surface of the shaft 20.

[0082] The inner diameter of the sleeve can be measured across the cavity in a direction perpendicular to the longitudinal axis. The inner diameter of the sleeve can be 0.07 inches to 0.08 inches, 0.08 inches to 0.09 inches, 0.09 inches to 0.10 inches, 0.10 inches to 0.11 inches, 0.11 inches to 0.12 inches, 0.12 inches to 0.13 inches, 0.13 inches to 0.14 inches, 0.14 inches to 0.15 inches, 0.15 inches to 0.16 inches, or 0.16 inches to 0.17 inches. In an exemplary embodiment, the inner diameter of the sleeve is 0.12 inches. The inner diameter of the sleeve can be sized such that the sleeve and the stick weight 430 fit snugly together. The tension between the sleeve and the stick weight 430 can further prevent rattling of the stick weight 430 within the shaft 20.

[0083] As described above and as shown in FIGS. 5A and 5C, the sleeve-type SW support 410 may further include a plurality of ridges 413 (hereinafter also referred to as "the plurality of ridges" or "ridges"). The plurality of ridges 413 may be disposed on the outer surface 416 of the sleeve and may extend outwardly. The plurality of ridges 413 contact the inner surface of the shaft and further support the stick weight assembly 400. In an exemplary embodiment, the plurality of ridges 413 may begin at the second end 415 of the sleeve and extend over a portion of the second portion 412. In another embodiment, the plurality of ridges 413 may begin at the second end 415 of the sleeve and extend over half of the second portion 411. In another embodiment, the plurality of ridges 413 may begin at the second end 415 of the sleeve and extend over a portion of the second portion 412 that is a distance shorter than half of the sleeve height. In another embodiment, the plurality of ridges 413 may begin at the second end 415 of the sleeve and extend into the first portion 411.

[0084] The plurality of raised portions 413 may have a raised portion length. The raised portion length can be measured from a first raised portion end to a second raised portion end in a direction parallel to the longitudinal axis. In some embodiments, the raised portion lengths may vary. In other embodiments, the raised portion lengths may be constant. The raised portion length may be from 0.30 inches to 0.75 inches. In some embodiments, the raised portion length may be from 0.30 inches to 0.35 inches, from 0.35 inches to 0.40 inches, from 0.40 inches to 0.45 inches, from 0.45 inches to 0.50 inches, from 0.50 inches to 0.55 inches, from 0.55 inches to 0.60 inches, from 0.60 inches to 0.65 inches, from 0.65 inches to 0.70 inches, or from 0.70 inches to 0.75 inches. In an exemplary embodiment, the raised portion length is 0.60 inches. The raised portion length can directly affect the amount of support and friction between the sleeve and the inner surface of the shaft.

[0085] The plurality of raised portions 413 can contact the inner surface of the shaft and further support the stick weight 430. The plurality of raised portions 413 may include from 2 to 15 raised portions. In some embodiments, the plurality of raised portions 413 may be from 2 to 6 raised portions, from 6 to 11 raised portions, or from 11 to 15 raised portions.

[0086] The plurality of raised portions 413 may have a raised portion shape, which may be regarded as the cross-section of the plurality of raised portions perpendicular to the longitudinal axis. The raised portion shape may be selected from the group consisting of a triangle, a semi-circle, and an ellipse. The raised portion shape creates a space for air to escape and can reduce the force required to insert the stick weight assembly 400 into the tip of the shaft. Further, the raised portion shape makes the raised portion more easily compressible as appropriate. Since the inner diameter of the shaft of a golf club varies, it may be desirable for the raised portion to be compressible. By compressing the raised portion, the stick weight assembly 400 can be applied to various shafts with different circumferences from the stick weight 430.

[0087] As described above, the sleeve-type SW support 410 may further include a plurality of holes 418 (hereinafter also referred to as "plurality of holes" or "holes"), and the plurality of holes 418 may be arranged at locations along the sleeve length. Due to the arrangement of these holes 418, the sleeve-type SW support 410 can be easily arranged on the stick weight 430. More specifically, the presence of the plurality of holes 418 allows air to escape when the sleeve-type SW support 410 is inserted onto the stick weight 430, enabling quick and easy attachment. The plurality of holes 418 may include 2 to 10 holes. In some embodiments, the plurality of holes 418 may be 2 to 4 holes, 4 to 6 holes, 6 to 8 holes, or 8 to 10 holes. The above-described plurality of holes and the plurality of recesses described below enable the easy formation of the stick weight support 410 and attachment to the stick weight 430. Further, the plurality of holes and the plurality of recesses allow for the quick and easy insertion of the stick weight assembly into the tip of the shaft, making the manufacturing process simpler and faster.

[0088] Furthermore, as described above, the sleeve-type SW support 410 may include a plurality of recesses 419, and the plurality of recesses 419 are arranged at locations along the length of the sleeve-type SW support 410. By this arrangement of the recesses 419, the stick weight assembly 400 can be maintained at the center during the injection molding process. The plurality of recesses 419 may include 2 to 10 recesses. In some embodiments, the plurality of recesses 419 may be 2 to 4 recesses, 4 to 6 recesses, 6 to 8 recesses, or 8 to 10 recesses. Similar to the plurality of holes, the plurality of recesses promote the flexibility of the SW support. As described above, the sleeve-type SW support 410 may be formed of a flexible TPE material. In an exemplary embodiment, the flexible TPE material may have a Shore A hardness of 60. The material of the sleeve-type SW support may have a greater elastic limit than the material of the stick weight. The material of the sleeve-type SW support enables the sleeve-type SW support 410 to be compressed when the stick weight assembly 400 is inserted into the shaft tip 10 and to expand when the stick weight assembly 400 is further pushed into the shaft 20. The material of the sleeve-type SW support also enables the raised portion 413 to be slightly compressed when disposed on the shaft 20. The tight fit between the raised portion 413 and the shaft 20 supports the stick weight 430 and can attenuate the vibrations generated during impact. II. Steel Stick Weight Assembly

[0089] The golf club described in this specification may include a club head, a steel shaft, a steel stick weight assembly, and a grip. The club head may include a body having a striking face, a toe, a heel opposite the toe, a sole, and a crown opposite the sole. The club head may further include a hosel. The hosel may be disposed near the heel of the club. The hosel may include a hosel bore. The hosel bore may be disposed at the upper edge of the hosel and may include a bore extending into the body of the club head. The shaft may include a shaft inner surface defining a shaft bore, a shaft tip portion proximate to the club head, and a grip end portion proximate to the grip. The shaft tip portion may be received within the hosel bore of the club head. The shaft may define a longitudinal axis extending from the geometric center of the tip portion to the geometric center of the grip end portion. The shaft may be a hollow cylinder and may have an opening formed near the tip portion configured to receive a steel stick weight assembly. The steel stick weight assembly may include a stick weight and a stick weight support (hereinafter also referred to as "SW support"). In some embodiments, the stick weight and the SW support may be integrated. In other embodiments, the stick weight and the SW support may be separate. The steel stick weight assembly provides a means for adding mass to the hosel portion of the golf club while reducing the space occupied by the stick weight assembly within the hosel to secure a discretionary mass and redistribute the discretionary mass thus secured throughout the club head. 1. Steel stepped stick weight

[0090] Here, a stick weight assembly with a stepped rod for enabling a closer fit within the shaft bore will be described. The upper portion of the stick weight may have a smaller diameter than the lower portion so that support features can be disposed thereon. In some embodiments, the lower portion of the stick weight may be configured to contact the inner surface of the shaft, creating an interference fit / clamping fit between the stick weight assembly and the inner surface of the shaft. Referring to FIGS. 6A-6D, the stick weight 530 may include a cylindrical rod 503 (referred to as the "rod") and a disk 504. The rod 503 may include an upper end 501 and a lower end 502. As shown in FIGS. 6A and 6B, the lower end 502 of the rod may be connected to the disk 504. The stick weight 530 may be received within the shaft 20 in the vicinity of the tip end 10 of the shaft such that the upper end 501 of the rod is disposed within the shaft 20 and the disk 504 abuts against the tip end 10 of the shaft. The rod 503 may be fully accommodated within the shaft 20, and the disk 504 may project from the tip end 10 of the shaft into the hosel 40.

[0091] The rod 503 may define a rod length measured from the upper end 501 to the lower end 502 along the longitudinal axis of the shaft 20. The rod length may be from 0.60 inches to 1.60 inches. In some embodiments, the rod length may be from 0.60 inches to 0.70 inches, from 0.70 inches to 0.80 inches, from 0.80 inches to 0.90 inches, from 0.90 inches to 1.00 inches, from 1.00 inches to 1.10 inches, from 1.10 inches to 1.20 inches, from 1.20 inches to 1.30 inches, from 1.30 inches to 1.40 inches, from 1.40 inches to 1.50 inches, or from 1.50 inches to 1.60 inches. In an exemplary embodiment, the rod length is 0.97 inches. The rod length can affect both the weight and durability of the stick weight 530. The longer the rod length, the greater the weight and the more prone to breakage. The longer the rod length, the greater the vibration force transmitted from the shaft 20 to the stick weight 530 during impact. If the vibration force is large, the stick weight 530 may be damaged. However, as will be described later, the SW support 510 can absorb some, if not all, of the vibrations generated during impact, so it is possible to use a long and heavy stick weight 530 if desired.

[0092] The stick weight assembly 500 may have a weight. As described above, the rod length can be a major factor in the weight of the stick weight assembly 500. In some embodiments, the weight may be from 1 gram to 20 grams. In some embodiments, the weight may be 1 gram, 2 grams, 3 grams, 4 grams, 5 grams, 6 grams, 7 grams, 8 grams, 9 grams, 10 grams, 11 grams, 12 grams, 13 grams, 14 grams, 15 grams, 16 grams, 17 grams, 18 grams, 19 grams, or 20 grams. In some embodiments, the weight may be less than 20 grams, less than 15 grams, less than 10 grams, or less than 5 grams. The size of the disk 504 can also affect the weight, but to a lesser extent than the rod length.

[0093] In some embodiments, the rod 503 may include an upper portion 505 and a lower portion 506. The upper portion 505 has an upper diameter, and the lower portion has a lower diameter. In some embodiments, the upper diameter is smaller than the lower diameter. In these embodiments, the upper portion 505 includes an upper end 501, and the lower portion 506 includes a lower end 502. The upper portion 505 may further have an upper shape that conforms to the cavity shape described below.

[0094] As shown in FIG. 6A, in some embodiments, the rod 503 may have an upper length measured along the longitudinal axis of the shaft from the upper end to the starting point of the lower portion. The upper length may be from 0.10 inches to 0.40 inches. In some embodiments, the upper length may be from 0.10 inches to 0.12 inches, 0.12 inches to 0.14 inches, 0.14 inches to 0.16 inches, 0.16 inches to 0.18 inches, 0.18 inches to 0.20 inches, 0.22 inches to 0.24 inches, 0.24 inches to 0.26 inches, 0.26 inches to 0.28 inches, 0.28 inches to 0.30 inches, 0.30 inches to 0.32 inches, 0.32 inches to 0.34 inches, 0.34 inches to 0.36 inches, 0.36 inches to 0.38 inches, or 0.38 inches to 0.40 inches. In an exemplary embodiment, the upper length is 0.25 inches.

[0095] In some embodiments, the rod 503 may have a lower length measured along the longitudinal axis of the shaft from the lower end 502 to the starting point of the upper portion 505. The lower length may be from 0.50 inches to 0.90 inches. In some embodiments, the lower length may be from 0.50 inches to 0.55 inches, 0.55 inches to 0.60 inches, 0.60 inches to 0.75 inches, 0.75 inches to 0.80 inches, 0.80 inches to 0.85 inches, or 0.85 inches to 0.90 inches. In an exemplary embodiment, the lower length is 0.72 inches.

[0096] In some embodiments, the upper portion 505 may define an upper diameter measured across the upper cross-section in a direction perpendicular to the longitudinal axis. The upper diameter may be from 0.14 inches to 0.30 inches. In some embodiments, the upper diameter may be from 0.14 inches to 0.16 inches, from 0.16 inches to 0.18 inches, from 0.18 inches to 0.20 inches, from 0.20 inches to 0.22 inches, from 0.22 inches to 0.24 inches, from 0.24 inches to 0.26 inches, from 0.26 inches to 0.28 inches, or from 0.28 inches to 0.30 inches. In an exemplary embodiment, the upper diameter is 0.22 inches.

[0097] In some embodiments, the lower portion 506 may define a lower diameter measured across the lower cross-section in a direction perpendicular to the longitudinal axis. The lower diameter may be from 0.20 inches to 0.40 inches. In some embodiments, this diameter may be from 0.20 inches to 0.22 inches, from 0.22 inches to 0.24 inches, from 0.24 inches to 0.26 inches, from 0.26 inches to 0.28 inches, from 0.28 inches to 0.30 inches, from 0.30 inches to 0.32 inches, from 0.32 inches to 0.34 inches, from 0.34 inches to 0.36 inches, from 0.36 inches to 0.38 inches, or from 0.38 inches to 0.40 inches. In some embodiments, the lower diameter is 0.288 inches. In other embodiments, the lower diameter is 0.282 inches. In further embodiments, the lower diameter may be constant. In still other embodiments, the lower diameter may vary. The lower portion 506 and the upper portion 505 may be sized to be inserted into the tip of the shaft.

[0098] As described above, the disk 504 may be connected to the lower end 502 and may be sized to abut against the shaft tip 10. The disk 504 may define a disk diameter measured across the surface of the disk 504 in a direction perpendicular to the longitudinal axis. The disk diameter may be from 0.20 inches to 0.40 inches. In some embodiments, the disk diameter may be from 0.20 inches to 0.25 inches, from 0.25 inches to 0.30 inches, from 0.30 inches to 0.35 inches, or from 0.35 inches to 0.40 inches. In an exemplary embodiment, the disk diameter is 0.35 inches. In another exemplary embodiment, the disk diameter is 0.32 inches.

[0099] The disk 504 may further define a disk thickness measured along the longitudinal axis of the shaft. The disk thickness may be from 0.020 inches to 0.100 inches. In some embodiments, the disk thickness may be from 0.020 inches to 0.050 inches, from 0.050 inches to 0.075 inches, or from 0.075 inches to 0.100 inches. In an exemplary embodiment, the disk thickness is 0.040 inches. In another exemplary embodiment, the disk thickness is 0.070 inches. The disk 504 may be sized to prevent the stick weight assembly 500 from being fully inserted into the shaft bore. This facilitates manufacturing and allows the stick weight assembly 500 to be placed quickly and consistently within the shaft bore.

[0100] In some embodiments, the disk 504 may further include a plurality of ribs 508 (hereinafter also referred to as "ribs"). The plurality of ribs 508 may extend parallel to the longitudinal axis of the shaft 20 and may be disposed on the outer surface of the disk 504. The plurality of ribs 508 may function as additional support means for holding the stick weight 530 in a desired position. The plurality of ribs 508 may include from 2 to 10 raised portions. In some embodiments, the plurality of raised portions 508 may include from 2 to 4 raised portions, from 4 to 6 raised portions, from 6 to 8 raised portions, or from 8 to 10 raised portions.

[0101] The plurality of ribs 508 may have a thickness, and this thickness may be from 0.010 inches to 0.025 inches. In some embodiments, the thickness may be from 0.010 inches to 0.015 inches, from 0.015 inches to 0.020 inches, or from 0.020 inches to 0.025 inches. In an exemplary embodiment, the thickness may be 0.008 inches.

[0102] In some embodiments, the plurality of ribs 508 may extend only along the thickness of the disk 504. In other embodiments, the plurality of ribs 508 may extend across the thickness of the disk 504 and further into the lower portion 502. The plurality of ribs 508 may define a length, and the length may be from 0.030 inches to 0.050 inches. In some embodiments, the length of the rib may be from 0.030 inches to 0.035 inches, from 0.035 inches to 0.040 inches, from 0.040 inches to 0.045 inches, or from 0.045 inches to 0.050 inches. a) Cap-type stick weight support

[0103] Here, a cap - type stick weight support having a cavity with a shape complementary to the stepped rod of the stick weight will be described. Further, the cap may include a protrusion that facilitates positioning of the stick weight within the shaft. As described above, the steel stick weight assembly 500 may include a stick weight support. In some embodiments, the SW support 510 may have a cap - like shape. The cap - shaped SW support 510 (hereinafter also referred to as the "cap" or "cap - type SW support") securely fixes the stick weight 530 within the shaft bore, as shown in FIG. 6B. The cap - type SW support 510 may include a first end 514, a second end 515, and an outer surface 516. The cap - type SW support 510 may further define a cavity 517 that extends from the second end 515 towards the first end 514. The cavity 517 has a depth measurable along the longitudinal axis. The cavity 517 may be configured to receive the second end of the stick weight 515. The cavity 517 may define a cavity shape complementary to the shape of the upper portion of the rod.

[0104] The cap - type SW support 510 may further include a cap outer diameter, a cap inner diameter, a first portion 511, a second portion 512, a recess 518, and a thickness. The first portion 511 may include a dome. The dome can guide the insertion of the cap - type SW support 510 into the shaft 20. The second portion 512 may include a cylindrical body that evenly distributes the force against the inside of the shaft 20. The cap outer diameter and the cap inner diameter may be varied to correspond to various shaft inner diameters. The cap outer diameter and the cap inner diameter may further be selected such that the cap - type SW support 510 fits snugly within the upper portion of the stick weight and within the shaft bore.

[0105] The cap outer diameter can be measured across the second end 515 of the cap-type SW support 510 in a direction perpendicular to the longitudinal axis. The cap outer diameter can be from 0.15 inches to 0.45 inches. In some embodiments, the cap outer diameter can be from 0.15 inches to 0.20 inches, from 0.20 inches to 0.25 inches, from 0.25 inches to 0.30 inches, from 0.30 inches to 0.35 inches, from 0.35 inches to 0.40 inches, or from 0.40 inches to 0.45 inches. In an exemplary embodiment, the cap outer diameter of the cap-type SW support 510 is 0.28 inches. The cap outer diameter of the cap-type SW support 510 can be sized such that the cap-type SW support 510 and the shaft 20 fit snugly together. The cap-type SW support 510 can prevent the play of the stick weight 530 by applying an outward force against the inner surface of the shaft.

[0106] The cap inner diameter can be measured across the cavity in a direction perpendicular to the longitudinal axis. The cap inner diameter can be from 0.14 inches to 0.30 inches. In some embodiments, the cap inner diameter can be from 0.14 inches to 0.16 inches, from 0.16 inches to 0.18 inches, from 0.18 inches to 0.20 inches, from 0.20 inches to 0.22 inches, from 0.22 inches to 0.24 inches, from 0.24 inches to 0.26 inches, from 0.26 inches to 0.28 inches, or from 0.28 inches to 0.30 inches. In an exemplary embodiment, the cap inner diameter is 0.208 inches. The cap inner diameter can be sized such that the cap-type SW support 510 and the stick weight 530 fit snugly together. The tension between the cap-type SW support 510 and the stick weight 530 can further prevent the play of the stick weight 530 within the shaft 20.

[0107] As described above and as shown in FIG. 6D, the cap-type SW support 510 may include a first portion 511 and a second portion 512. The first portion 511 includes a dome and a recess 518, and the second portion 512 includes a cylindrical body. The first portion 511 may have a first portion height measurable from the lower end of the dome upward to the first end 514 of the cap-type SW support 510. The first portion height may be from 0.05 inches to 0.35 inches. In some embodiments, the first portion height may be from 0.05 inches to 0.10 inches, from 0.10 inches to 0.15 inches, from 0.15 inches to 0.20 inches, from 0.20 inches to 0.25 inches, from 0.25 inches to 0.30 inches, or from 0.30 inches to 0.35 inches. In an exemplary embodiment, the first portion height is 0.155 inches.

[0108] Furthermore, the second portion 512 may have a second portion height measurable from the lower end of the dome downward to the second end 515 of the cap-type SW support 510. The second portion height may be from 0.10 inches to 0.30 inches. In some embodiments, the second portion height may be from 0.10 inches to 0.12 inches, from 0.12 inches to 0.14 inches, from 0.14 inches to 0.16 inches, from 0.16 inches to 0.18 inches, from 0.18 inches to 0.20 inches, from 0.20 inches to 0.22 inches, from 0.22 inches to 0.24 inches, from 0.24 inches to 0.26 inches, from 0.26 inches to 0.28 inches, or from 0.28 inches to 0.30 inches. In an exemplary embodiment, the second portion height is 0.145 inches.

[0109] In some embodiments, as shown in FIG. 6C, the second portion 512 may further include a plurality of ridges 513 (hereinafter also referred to as "ridges") that protrude outwardly from the outer surface 516 of the cap-type SW support 510. The plurality of ridges 513 may be disposed within the range of the second portion 512 and close to the second end 515 of the cap-type SW support 510. The plurality of ridges 513 can contact the inner surface of the shaft 20 to more reliably support the stick weight 530. The plurality of ridges 513 may include 2 to 15 ridges. In some embodiments, the plurality of ridges 513 may be 2 to 6 ridges, 6 to 11 ridges, or 11 to 15 ridges. In an exemplary embodiment, the plurality of ridges 513 includes 6 ridges.

[0110] The plurality of ridges 513 may have a ridge shape, and the ridge shape may be regarded as the cross-section of a plurality of ridges perpendicular to the longitudinal axis. The ridge shape may be selected from the group consisting of a triangle, a semi-circle, and an ellipse. The ridge shape of the plurality of ridges 513 can create a space for air to escape and reduce the force required to insert the stick weight assembly 500 into the shaft tip 10. Further, the ridge shape makes the plurality of ridges 513 compressible as appropriate. In order to accommodate various shaft inner diameters, it may be desirable for the ridges to be compressible.

[0111] The length of the raised portion can be measured from the second end 515 upward to the end point of the raised portion in a direction parallel to the longitudinal axis. In some embodiments, the cap-type SW support 510 may include raised portions 513 of various lengths. In other embodiments, the cap-type SW support 510 may include raised portions 513 of a constant length. Regardless of whether the cap-type SW support 510 has raised portions 513 of various lengths or raised portions 513 of a constant length, the length of the raised portion is from 0.10 inches to 0.20 inches. In some embodiments, the length of the raised portion is from 0.10 inches to 0.11 inches, from 0.11 inches to 0.12 inches, from 0.12 inches to 0.13 inches, from 0.13 inches to 0.14 inches, from 0.14 inches to 0.15 inches, from 0.15 inches to 0.16 inches, from 0.16 inches to 0.17 inches, from 0.17 inches to 0.18 inches, from 0.18 inches to 0.19 inches, or from 0.19 inches to 0.20 inches. In an exemplary embodiment, the length of the raised portion is 0.145 inches. In some embodiments, the raised portion 513 may extend over the entire length of the second portion 512. In other embodiments, the raised portion 513 may extend into the first portion 511 beyond the second portion 512. In other embodiments, the raised portion 513 may extend into the second portion 512. The length of the raised portion can affect the magnitude of the force that the stick weight assembly 500 applies to the shaft inner diameter.

[0112] As described above, the cap-type SW support 510 may be formed from a flexible TPE material. In an exemplary embodiment, the flexible TPE material may have a Shore A hardness of 60. The material of the cap-type SW support may have a greater elastic limit than the material of the stick weight. The material of the cap-type SW support may facilitate compression when the stick weight assembly 500 is inserted into the shaft tip 10 and may substantially expand when the stick weight assembly 500 is further pushed within the shaft 20. The material of the cap-type SW support also enables the raised portion 513 to be slightly compressed when disposed on the shaft 20. The tight fit between the raised portion 513 and the shaft 20 supports the stick weight 530 and can attenuate vibrations generated during impact. 2. Steel stepped stick weight with an upper opening

[0113] Here, a stick weight assembly is described that includes a stepped rod having an opening to allow for a tighter and more secure fit within a shaft bore. The upper portion of the stick weight may have a smaller diameter than the lower portion so that support features can be disposed thereon. The lower portion of the stick weight may be configured to contact the inner surface of the shaft, creating a press fit / clamp fit between the cap and the inner surface of the shaft. Further, an opening is provided in the upper portion, which increases the surface area to which a support member can be attached, resulting in a more secure fit within the shaft. Referring to FIGS. 7A - 7D and FIGS. 8A - 8D, the stick weight 630 may include a cylindrical rod 603 (referred to herein as the "rod") and a disk 604. The rod 603 may have an upper end and a lower end. As shown in FIGS. 7A and 8A, the lower end of the rod 603 may be connected to the disk 604. The stick weight 630 may be received within the shaft 20 near the tip end 10 of the shaft such that the upper end of the rod 603 is positioned within the shaft 20 and the disk 604 abuts the tip end 10 of the shaft. The rod 603 may be fully received within the shaft 20, and the disk 604 may project from the tip end 10 of the shaft into the hosel 40.

[0114] The rod 603 may define a length measured from the upper end to the lower end along the longitudinal axis of the shaft. This length may be from 0.60 inches to 1.60 inches. In some embodiments, this length may be from 0.60 inches to 0.70 inches, 0.70 inches to 0.80 inches, 0.80 inches to 0.90 inches, 0.90 inches to 1.00 inches, 1.00 inches to 1.10 inches, 1.10 inches to 1.20 inches, 1.20 inches to 1.30 inches, 1.30 inches to 1.40 inches, 1.40 inches to 1.50 inches, or 1.50 inches to 1.60 inches. In an exemplary embodiment, the length of the rod is 0.97 inches.

[0115] The length of the rod can affect both the weight and durability of the stick weight 630. When the rod is long, the weight increases and it becomes more prone to breakage. When the rod is long, the vibration force transmitted from the shaft 20 to the stick weight 630 during impact may increase. If the vibration force is large, the stick weight 630 may be damaged. However, as will be described later, the SW support 610 can absorb at least a part, if not all, of the vibration generated during impact. Therefore, if desired, it is possible to use a long and heavy stick weight 630.

[0116] The stick weight assembly 600 has a weight. As described above, the length of the rod can be a major factor in the weight of the stick weight assembly 600. In some embodiments, the weight may be from 1 gram to 20 grams. In some embodiments, the weight may be 1 gram, 2 grams, 3 grams, 4 grams, 5 grams, 6 grams, 7 grams, 8 grams, 9 grams, 10 grams, 11 grams, 12 grams, 13 grams, 14 grams, 15 grams, 16 grams, 17 grams, 18 grams, 19 grams, or 20 grams. In some embodiments, the weight may be less than 20 grams, less than 15 grams, less than 10 grams, or less than 5 grams. The size of the disk 604 can also affect the weight, but to a lesser extent than the length of the rod.

[0117] In some embodiments, the rod 603 may include an upper portion 605 and a lower portion 606. The upper portion 605 has an upper diameter, and the lower portion 606 has a lower diameter. In some embodiments, the upper diameter is smaller than the lower diameter. In these embodiments, the upper portion 605 may include an upper end, and the lower portion 606 may include a lower end. As will be described later, the upper portion 605 may further include an upper shape that conforms to the cavity shape.

[0118] In some embodiments, the rod 603 may have an upper length measured along the longitudinal axis of the shaft from the upper end to the lower starting point. The upper length may be from 0.10 inches to 0.40 inches. In some embodiments, the upper length may be from 0.10 inches to 0.12 inches, 0.12 inches to 0.14 inches, 0.14 inches to 0.16 inches, 0.16 inches to 0.18 inches, 0.18 inches to 0.20 inches, 0.22 inches to 0.24 inches, 0.24 inches to 0.26 inches, 0.26 inches to 0.28 inches, 0.28 inches to 0.30 inches, 0.30 inches to 0.32 inches, 0.32 inches to 0.34 inches, 0.34 inches to 0.36 inches, 0.36 inches to 0.38 inches, or 0.38 inches to 0.40 inches. In an exemplary embodiment, the upper length is 0.25 inches.

[0119] In some embodiments, the upper portion may define an upper diameter measured across the upper cross-section in a direction perpendicular to the longitudinal axis. The upper diameter may be from 0.14 inches to 0.30 inches. In some embodiments, the diameter may be from 0.14 inches to 0.16 inches, 0.16 inches to 0.18 inches, 0.18 inches to 0.20 inches, 0.20 inches to 0.22 inches, 0.22 inches to 0.24 inches, 0.24 inches to 0.26 inches, 0.26 inches to 0.28 inches, or 0.28 inches to 0.30 inches. In an exemplary embodiment, the upper diameter is 0.22 inches.

[0120] The upper portion 605 may further define a hole 609. The hole 609 may be recessed inwardly of the upper portion 605 in a direction perpendicular to the longitudinal axis. In some embodiments, the hole 609 may penetrate the upper portion 605. As will be described in further detail below, the SW support 610 may be cast or molded onto the upper portion 605. The presence of the hole 609 allows the material of the cap-type SW support to flow into the hole 609, thereby forming a retainer 618 and firmly fixing the cap-type SW support 610 to the upper portion 605. The hole 609 enables the cap-type SW support 610 to be molded onto the upper portion 605. Thereby, the cap-type SW support 610 is permanently fixed to the stick weight 630. Further, the stick weight assembly 600 can be easily inserted and, as appropriate, easily removed from the shaft tip 10.

[0121] The hole 609 may have a hole diameter measured in a direction parallel to the longitudinal axis. The hole diameter may be from 0.05 inches to 0.10 inches. In some embodiments, the hole diameter may be from 0.05 inches to 0.06 inches, from 0.06 inches to 0.07 inches, from 0.07 inches to 0.08 inches, from 0.08 inches to 0.09 inches, or from 0.09 inches to 0.10 inches. As will be described below, the hole diameter may be large enough such that when the cap-type SW support 610 is cast onto the upper portion 605, the material of the cap-type SW support 610 fills the entire hole 609 to form the retainer 618.

[0122] As described above, the rod 603 may have a lower length measured from the lower end to the upper starting point along the longitudinal axis of the shaft. The lower length may be from 0.50 inches to 0.90 inches. In some embodiments, the lower length may be from 0.50 inches to 0.55 inches, from 0.55 inches to 0.60 inches, from 0.60 inches to 0.65 inches, from 0.65 inches to 0.70 inches, from 0.70 inches to 0.75 inches, from 0.75 inches to 0.80 inches, from 0.80 inches to 0.85 inches, or from 0.85 inches to 0.90 inches. In an exemplary embodiment, the lower length is 0.72 inches. In another exemplary embodiment, the lower length is 1.39 inches.

[0123] In some embodiments, the lower portion 606 may define a lower diameter measured across the lower cross-section in a direction perpendicular to the longitudinal axis. The lower diameter may be from 0.20 inches to 0.40 inches. In some embodiments, this diameter may be from 0.20 inches to 0.22 inches, from 0.22 inches to 0.24 inches, from 0.24 inches to 0.26 inches, from 0.26 inches to 0.28 inches, from 0.28 inches to 0.30 inches, from 0.30 inches to 0.32 inches, from 0.32 inches to 0.34 inches, from 0.34 inches to 0.36 inches, from 0.36 inches to 0.38 inches, or from 0.38 inches to 0.40 inches. In an exemplary embodiment, the lower diameter is 0.28 inches. In some embodiments, the lower diameter may be constant. In other embodiments, the lower diameter may vary. As described above, the lower end of the lower portion 606 may be connected to the disk 604.

[0124] As described above, the disk 604 may be connected to the lower end of the rod and may be sized to abut against the shaft tip 10. The disk 604 may define a disk diameter measured across the surface of the disk 604 in a direction perpendicular to the longitudinal axis. This diameter may be from 0.20 inches to 0.40 inches. In some embodiments, this diameter may be from 0.20 inches to 0.25 inches, from 0.25 inches to 0.30 inches, from 0.30 inches to 0.35 inches, or from 0.35 inches to 0.40 inches. In an exemplary embodiment, the disk diameter is 0.35 inches. In another exemplary embodiment, the disk diameter is 0.32 inches. The disk diameter may be large enough so that the stick weight 630 is properly positioned at the correct insertion depth within the shaft tip 10. More specifically, the disk diameter may be large enough to prevent the entire stick weight assembly 600 from being disposed within the shaft tip 10. The disk diameter may be small enough so as not to interfere with the inner surface of the hosel bore when the shaft 20 is inserted into the hosel 40.

[0125] The disk 604 may further define a disk thickness measured along the longitudinal axis of the shaft. The disk thickness may be from 0.020 inches to 0.100 inches. In some embodiments, the disk thickness may be from 0.020 inches to 0.050 inches, from 0.050 inches to 0.075 inches, or from 0.075 inches to 0.100 inches. In an exemplary embodiment, the disk thickness is 0.040 inches. In another exemplary embodiment, the disk thickness is 0.070 inches. As described above, the disk 604 may be disposed outside the shaft 20, while the rod 603 and the cap-type SW support 610 are disposed inside the shaft 20. The disk 604 may be sized to prevent the stick weight assembly 600 from being fully inserted into the shaft bore. This facilitates manufacturing and allows the stick weight assembly 600 to be quickly and consistently positioned within the shaft bore.

[0126] In some embodiments, the disk 604 may further include a plurality of ribs 608 (hereinafter also referred to as "ribs"). The plurality of ribs 608 may extend parallel to the longitudinal axis of the shaft 20 and may be disposed on the outer surface of the disk 604. The plurality of ribs 608 may function as additional support means for holding the stick weight 630 in a desired position. The plurality of ribs 608 may include from 2 to 10 ribs. In some embodiments, the plurality of ribs 608 may be 2 to 4 ribs, 4 to 6 ribs, 6 to 8 ribs, or 8 to 10 ribs.

[0127] The plurality of ribs 608 may have a thickness, which may be from 0.010 inches to 0.025 inches. In some embodiments, this thickness may be from 0.010 inches to 0.015 inches, 0.015 inches to 0.020 inches, or 0.020 inches to 0.025 inches. In an exemplary embodiment, this thickness may be 0.008 inches. This thickness may be small enough so as not to interfere with the inner surface of the hosel bore when the shaft 20 is inserted into the hosel 40.

[0128] In some embodiments, the plurality of ribs 608 may extend only along the thickness of the disk 604. In other embodiments, the plurality of ribs 608 may extend across the thickness of the disk 604 and may further extend into the lower portion 606. The plurality of ribs 608 may define a length, which may be from 0.030 inches to 0.050 inches. In some embodiments, the length of the rib may be from 0.030 inches to 0.035 inches, 0.035 inches to 0.040 inches, 0.040 inches to 0.045 inches, or 0.045 inches to 0.050 inches. a) Cap-type stick weight support having a retainer

[0129] Here, a cap-type stick weight support having a shape complementary to that of the rod of the stick weight will be described. Further, the cap includes a retainer configured to be disposed within the opening of the rod of the stick weight. The retainer provides a greater surface area for the connection between the cap and the rod, resulting in a stronger connection. Further, the cap includes a protrusion on the outer surface to facilitate positioning the stick weight within the shaft. The steel stick weight assembly 600 described herein may include an alternative cap-type stick weight support 610 (hereinafter also referred to as the "cap" or "cap-type SW support"). In some embodiments, as shown in FIGS. 7B and 8B, the cap-type SW support 610 may be disposed at the second end of the stick weight, and the stick weight 630 and the cap-type SW support 610 are disposed within the shaft 20. The cap-type SW support 610 may include a first end 614, a second end 615, and an outer surface 616. The cap-type SW support 610 may define a cavity 617 that extends into the cap-type SW support 610 from the second end 615 toward the first end 614. The cavity 617 may have a depth measurable along the longitudinal axis. The cavity 617 may define a cavity shape complementary to the upper shape.

[0130] In some embodiments, the cap-type SW support 610 may be cast onto the upper portion of the stick weight. In such embodiments, a mold is disposed on the upper portion 611. The mold may allow the material of the cap-type SW support to flow into the hole, thereby forming the retainer 618. As described above, the material of the cap-type SW support can flow through the hole 609, thereby providing the retainer 618 that fixes the cap-type SW support 610 to the stick weight 630. Thereby, the retainer can be formed. The retainer 618 may have a shape that conforms to the shape of the hole 609. The retainer 618 may extend from one side of the cavity 617 to the other side in a direction perpendicular to the longitudinal axis.

[0131] The retainer 618 may have a retainer diameter. The retainer diameter may be from 0.05 inches to 0.10 inches. In some embodiments, the retainer diameter may be from 0.05 inches to 0.06 inches, from 0.06 inches to 0.07 inches, from 0.07 inches to 0.08 inches, from 0.08 inches to 0.09 inches, or from 0.09 inches to 0.10 inches. The retainer diameter may be the same as the diameter of the hole 609, as described above. The retainer diameter may be large enough such that the retainer 618 has sufficient strength to withstand the force applied to the cap-type SW support 610 when the stick weight assembly 600 is inserted into and removed from the shaft tip 10. Further, the retainer diameter may be large enough such that the retainer 618 has sufficient strength to insert and remove the stick weight assembly 600 into and from the shaft tip 10 without removing the cap-type SW support 610 from the stick weight 630.

[0132] The cap-type SW support 610 may further have a shape that can easily insert the stick weight assembly 600 into the shaft tip 10 while forming a tight fit between the stick weight assembly 600 and the inner surface of the shaft. The cap-type SW support 610 may include a cap outer diameter, a cap inner diameter, a first portion 611, a second portion 612, and a thickness. The first portion 611 may include a dome that ensures easy insertion into the shaft 20. The second portion 612 may include a cylindrical body that evenly distributes force against the inside of the shaft 20. The cap outer diameter and the cap inner diameter may be varied to correspond to various shaft inner diameters. Further, the cap outer diameter and the cap inner diameter may be selected such that the cap-type SW support 610 fits securely within the upper portion and the shaft bore. More specifically, the cap outer diameter may be sized such that the cap can be inserted without applying excessive force, yet a press fit / clamping fit is formed between the cap and the inner surface of the shaft.

[0133] The cap outer diameter of the cap - type SW support 610 can be measured across the second end 615 in a direction perpendicular to the longitudinal axis. The cap outer diameter can be from 0.15 inches to 0.45 inches. In some embodiments, the cap outer diameter can be from 0.15 inches to 0.20 inches, from 0.20 inches to 0.25 inches, from 0.25 inches to 0.30 inches, from 0.30 inches to 0.35 inches, from 0.35 inches to 0.40 inches, or from 0.40 inches to 0.45 inches. In an exemplary embodiment, the cap outer diameter is 0.28 inches. The cap outer diameter can be sized such that the outer surface and the inner surface of the shaft fit snugly. The cap - type SW support 610 can apply a force to the inner surface of the shaft to prevent rattling of the stick weight 630 and eliminate the need to use epoxy resin in the manufacturing process.

[0134] The cap inner diameter can be measured across the cavity 617 in a direction perpendicular to the longitudinal axis. The cap inner diameter can be from 0.14 inches to 0.30 inches. In some embodiments, the cap inner diameter can be from 0.14 inches to 0.16 inches, from 0.16 inches to 0.18 inches, from 0.18 inches to 0.20 inches, from 0.20 inches to 0.22 inches, from 0.22 inches to 0.24 inches, from 0.24 inches to 0.26 inches, from 0.26 inches to 0.28 inches, or from 0.28 inches to 0.30 inches. In an exemplary embodiment, the cap inner diameter is 0.208 inches. The cap inner diameter can be sized such that the cap - type SW support 610 and the stick weight 630 fit snugly. The tension between the cap - type SW support 610 and the stick weight 630 can further prevent rattling of the stick weight 630 within the shaft 20.

[0135] As described above, the cap-type SW support 610 may include a first portion 611 and a second portion 612, where the first portion 611 includes a dome and the second portion 612 includes a cylindrical body. The first portion 611 may have a first portion height measurable from the lower end of the dome upward to the first end 614 of the cap-type SW support 610. The first portion height may be from 0.05 inches to 0.35 inches. In some embodiments, the first portion height may be from 0.05 inches to 0.10 inches, from 0.10 inches to 0.15 inches, from 0.15 inches to 0.20 inches, from 0.20 inches to 0.25 inches, from 0.25 inches to 0.30 inches, or from 0.30 inches to 0.35 inches. In an exemplary embodiment, the first portion height is 0.155 inches.

[0136] Furthermore, the second portion 612 may have a second portion height measurable from the lower end of the dome downward to the second end 615 of the cap-type SW support 610. The second portion height may be from 0.10 inches to 0.30 inches. In some embodiments, the second portion height may be from 0.10 inches to 0.12 inches, from 0.12 inches to 0.14 inches, from 0.14 inches to 0.16 inches, from 0.16 inches to 0.18 inches, from 0.18 inches to 0.20 inches, from 0.20 inches to 0.22 inches, from 0.22 inches to 0.24 inches, from 0.24 inches to 0.26 inches, from 0.26 inches to 0.28 inches, or from 0.28 inches to 0.30 inches. In an exemplary embodiment, the second portion height is 0.145 inches.

[0137] In some embodiments, as best shown in FIGS. 7C and 8C, the second portion 612 may further include a plurality of ridges 613 (hereinafter also referred to as "ridges") that protrude outwardly from the outer surface of the cap-shaped SW support 610. The plurality of ridges 613 may be disposed close to the second end 615. The plurality of ridges 613 can contact the inner surface of the shaft 20 to more securely support the stick weight 630. The plurality of ridges 613 may include from 2 to 15 ridges. In some embodiments, the plurality of ridges 613 may be 2 to 6 ridges, 6 to 11 ridges, or 11 to 15 ridges. In an exemplary embodiment, the plurality of ridges 613 includes 6 ridges.

[0138] The plurality of ridges 613 may have a ridge shape, which may be regarded as a cross-section of a plurality of ridges perpendicular to the longitudinal axis. The ridge shape may be selected from the group consisting of a triangle, a semi-circle, and an ellipse. The shape of the plurality of ridges 613 creates a space for air to escape and can reduce the force required to insert the stick weight assembly 600 into the shaft tip 10. Further, this shape makes the ridges 613 more easily compressible as appropriate. In order to accommodate various shaft inner diameters, it may be desirable for the ridges to be compressible. Also, by compressing the ridges 613, it becomes possible to use the stick weight assembly 600 with various shafts.

[0139] The length of the raised portion can be measured from the second end 615 upward to the end point of the raised portion in a direction parallel to the longitudinal axis. In some embodiments, the cap-type SW support 610 may have raised portions of various lengths. In other embodiments, the cap-type SW support 610 may have raised portions of a constant length. Regardless of whether the cap-type SW support 610 has raised portions of various lengths or raised portions of a constant length, the length of the raised portion may be from 0.10 inches to 0.20 inches. In some embodiments, the length of the raised portion may be from 0.10 inches to 0.11 inches, from 0.11 inches to 0.12 inches, from 0.12 inches to 0.13 inches, from 0.13 inches to 0.14 inches, from 0.14 inches to 0.15 inches, from 0.15 inches to 0.16 inches, from 0.16 inches to 0.17 inches, from 0.17 inches to 0.18 inches, from 0.18 inches to 0.19 inches, or from 0.19 inches to 0.20 inches. In an exemplary embodiment, the length of the raised portion is 0.145 inches. In some embodiments, the raised portion 613 may extend over the entire length of the second portion 612. In other embodiments, the raised portion 613 may extend into the first portion 611 beyond the second portion 612. In other embodiments, the raised portion 613 may extend into the second portion 612. The length of the raised portion can affect the amount of force that the stick weight assembly 600 applies to the shaft inner diameter.

[0140] As described above, the cap-type SW support 610 may be formed from a flexible TPE material. In an exemplary embodiment, the flexible TPE material may have a Shore A hardness of 60. The material of the cap-type SW support may have a much greater elastic limit than the material of the stick weight. The material of the cap-type SW support may facilitate compression when the stick weight assembly 600 is inserted into the shaft tip 10 and then expand when the stick weight assembly 600 is further pushed into the shaft 20. The material of the cap-type SW support may also allow the raised portion 613 to be slightly compressed when the raised portion 613 is disposed within the shaft 20. The tight fit between the raised portion 613 and the shaft 20 supports the stick weight 630 and can attenuate the vibrations generated during impact. 3. Step-shaped stick weight having a channel

[0141] Here, a stick weight assembly is described that includes a stepped stick weight having a channel to provide a stronger fit between the support feature and the stick weight by providing a larger surface. The upper portion of the stick weight may have a smaller diameter than the lower portion so that a support feature can be disposed thereon. The lower portion of the stick weight is configured to contact the inner surface of the shaft and can create a press fit / clamp fit between the cap and the inner surface of the shaft. Further, a channel is provided in the upper portion, which can increase the surface area to which the support feature is attached and provide a stronger fit within the shaft. Referring to FIGS. 9A - 9D, a steel stick weight assembly 700 may include, according to a fourth embodiment, a stick weight 730 and a cap - type stick weight support 710 (hereinafter referred to as "cap - type SW support"). The stick weight 730 may include a cylindrical rod 703 (referred to as "rod") and a disk 704. The rod 703 may have an upper end and a lower end. The lower end of the rod 703 may be connected to the disk 704. The stick weight 730 may be received within the shaft 20 near the tip 10 of the shaft such that the upper end of the rod 703 is disposed within the shaft 20 and the disk 704 abuts against the tip 10 of the shaft. The rod 703 may be fully received within the shaft 20, and the disk 704 may protrude from the tip 10 of the shaft.

[0142] The rod 703 may define a rod length measured from the upper end to the lower end along the longitudinal axis of the shaft 20. The rod length may be from 0.60 inches to 1.60 inches. In some embodiments, the rod length may be from 0.60 inches to 0.70 inches, from 0.70 inches to 0.80 inches, from 0.80 inches to 0.90 inches, from 0.90 inches to 1.00 inches, from 1.00 inches to 1.10 inches, from 1.10 inches to 1.20 inches, from 1.20 inches to 1.30 inches, from 1.30 inches to 1.40 inches, from 1.40 inches to 1.50 inches, or from 1.50 inches to 1.60 inches. In an exemplary embodiment, the rod length is 0.93 inches.

[0143] The rod length can affect both the weight and durability of the stick weight 730. When the rod length is long, the weight increases and it becomes more prone to breakage. When the rod length is long, the vibration force transmitted from the shaft to the stick weight 730 during impact may increase. If the vibration force is large, the stick weight 730 may be damaged. However, as will be further described below, the SW support 710 can absorb at least a part, if not all, of the vibrations generated during impact. Therefore, if desired, it is possible to use a long and heavy stick weight 730.

[0144] The stick weight assembly 700 may have a weight. As described above, the rod length can be a major factor in the weight of the stick weight assembly 700. In some embodiments, the weight may be from 1 gram to 22 grams. In some embodiments, the weight may be from 1 gram to 4 grams, from 4 grams to 7 grams, from 7 grams to 10 grams, from 10 grams to 13 grams, from 13 grams to 16 grams, from 16 grams to 19 grams, or from 19 grams to 22 grams. In some embodiments, the weight may be less than 20 grams, less than 15 grams, less than 10 grams, or less than 5 grams. The size of the disk 704 can also affect the weight, but to a lesser extent than the rod length.

[0145] The rod 703 may include an upper end and a lower end. The lower end of the rod 703 may be in contact with the disk 704. The stick weight 730 may be received within the shaft 20 near the tip such that the upper end of the rod 703 is disposed within the shaft 20 and the disk 704 abuts against the tip of the shaft 10. The rod 703 may be fully received within the shaft 20, and the disk 704 may protrude from the tip of the shaft 10. The upper portion 705 may further have an upper shape that conforms to the cavity shape described below.

[0146] In some embodiments, the rod 703 may have an upper length measured along the longitudinal axis of the shaft from the upper end to the lower starting point. The upper length may be from 0.10 inches to 0.40 inches. In some embodiments, the upper length may be from 0.10 inches to 0.12 inches, 0.12 inches to 0.14 inches, 0.14 inches to 0.16 inches, 0.16 inches to 0.18 inches, 0.18 inches to 0.20 inches, 0.22 inches to 0.24 inches, 0.24 inches to 0.26 inches, 0.26 inches to 0.28 inches, 0.28 inches to 0.30 inches, 0.30 inches to 0.32 inches, 0.32 inches to 0.34 inches, 0.34 inches to 0.36 inches, 0.36 inches to 0.38 inches, or 0.38 inches to 0.40 inches. In an exemplary embodiment, the upper length is 0.25 inches.

[0147] In some embodiments, the upper portion may define an upper diameter measured across the upper cross-section in a direction perpendicular to the longitudinal axis. The upper diameter may be from 0.14 inches to 0.30 inches. In some embodiments, the diameter may be from 0.14 inches to 0.16 inches, 0.16 inches to 0.18 inches, 0.18 inches to 0.20 inches, 0.20 inches to 0.22 inches, 0.22 inches to 0.24 inches, 0.24 inches to 0.26 inches, 0.26 inches to 0.28 inches, or 0.28 inches to 0.30 inches. In an exemplary embodiment, the upper diameter is 0.22 inches.

[0148] The upper portion 705 may further define a channel 709. The channel 709 is recessed inwardly of the upper portion 705 in a direction perpendicular to the longitudinal axis. The channel 709 is configured to receive a portion of the cap-type SW support 710, provide additional support, and enable the support features to remain in a predetermined position during assembly. The channel 709 may be defined by a bottom surface, a first wall, and a second wall. Each of the first wall and the second wall may have a wall height. In an exemplary embodiment, the first wall height and the second wall height may be the same. In another embodiment, the first wall height may be greater than the second wall height. In yet another embodiment, the second wall height may be greater than the first wall height. The first wall height and the second wall height, together with the bottom surface, may determine the shape of the cavity 717 of the cap described below.

[0149] In other embodiments (not shown), the channel may comprise an interlock that cooperates with a cavity of the cap-type SW support. The interlock of the channel may provide torsional resistance to the stick weight assembly. Further, the interlock of the channel enables the cap-type SW support to remain in a predetermined position within the shaft tip during attachment and to remain in a predetermined position when removed from the shaft tip. The interlock of the channel and the cavity may be one or more protrusions, teeth, recesses, threads, or other interlocks.

[0150] In some embodiments, the channel interlock may protrude from the first wall of the channel and the second wall of the channel. In some embodiments, the channel interlock may protrude from the bottom surface of the channel. In other embodiments, the channel interlock may protrude from only the first wall of the channel or only the second wall of the channel. The various embodiments of the stick weight system described herein (i.e., stick weight assemblies 100, 200, 300, 400, 500, 600, 800, 900, and 1000) may include an interlock and are not limited to placing the interlock within the channel and can be applied to the various features of the aforementioned stick weight assemblies.

[0151] Channel 709 may further include a channel depth. The channel depth may be large enough such that the cap - type SW support 710 remains firmly attached to the stick weight 730 during and after the overmolding process. The channel depth may be small enough to maintain the durability of the cap - type SW support 710. The channel depth may be from 0.05 inches to 0.10 inches. In some embodiments, the depth may be from 0.05 inches to 0.06 inches, 0.06 inches to 0.07 inches, 0.07 inches to 0.08 inches, 0.08 inches to 0.09 inches, or 0.09 inches to 0.10 inches. In an exemplary embodiment, the channel depth is 0.06 inches.

[0152] As described above, the rod 703 may have a lower length. The lower length can be measured along the longitudinal axis from the lower end to the upper starting point. The upper length may be from 0.50 inches to 1.50 inches. In some embodiments, the upper length may be from 0.50 inches to 0.55 inches, from 0.55 inches to 0.60 inches, from 0.60 inches to 0.65 inches, from 0.65 inches to 0.70 inches, from 0.70 inches to 0.75 inches, from 0.75 inches to 0.80 inches, from 0.80 inches to 0.85 inches, from 0.85 inches to 0.90 inches, from 0.90 inches to 1.00 inches, from 1.05 inches to 1.10 inches, from 1.10 inches to 1.15 inches, from 1.15 inches to 1.20 inches, from 1.20 inches to 1.25 inches, from 1.25 inches to 1.30 inches, from 1.30 inches to 1.35 inches, from 1.35 inches to 1.40 inches, from 1.40 inches to 1.45 inches, or from 1.45 inches to 1.50 inches. In an exemplary embodiment, the lower length is 0.68 inches. In another exemplary embodiment, the lower length is 1.40 inches. As described above, the weight of the stick weight assembly 700 can depend on the length of the rod. The length and weight of the rod can also be affected by the lower length.

[0153] In some embodiments, the lower portion may define a lower diameter that is measured across the lower cross-section in a direction perpendicular to the longitudinal axis. The lower diameter may be from 0.20 inches to 0.40 inches. In some embodiments, the diameter may be from 0.20 inches to 0.22 inches, from 0.22 inches to 0.24 inches, from 0.24 inches to 0.26 inches, from 0.26 inches to 0.28 inches, from 0.28 inches to 0.30 inches, from 0.30 inches to 0.32 inches, from 0.32 inches to 0.34 inches, from 0.34 inches to 0.36 inches, from 0.36 inches to 0.38 inches, or from 0.38 inches to 0.40 inches. In an exemplary embodiment, the lower diameter is 0.28 inches. In some embodiments, the lower diameter may be constant. In other embodiments, the lower diameter may vary. As described above, the lower end of the lower portion 706 may be connected to the disk 704.

[0154] As described above, the disk 704 may be connected to the lower end of the rod and may be sized to abut against the shaft tip 10. The disk 704 may define a disk diameter measured across the surface of the disk in a direction perpendicular to the longitudinal axis. The disk diameter may be from 0.20 inches to 0.40 inches. In some embodiments, the disk diameter may be from 0.20 inches to 0.25 inches, from 0.25 inches to 0.30 inches, from 0.30 inches to 0.35 inches, or from 0.35 inches to 0.40 inches. In an exemplary embodiment, the disk diameter is 0.35 inches. In another exemplary embodiment, the disk diameter is 0.32 inches. The disk diameter may be large enough so that the stick weight 730 is positioned at the correct insertion depth within the shaft tip 10. More specifically, the disk diameter may be large enough to prevent the entire stick weight assembly 700 from being inserted into the shaft tip 10. The disk diameter may be small enough so as not to interfere with the inner surface of the hosel bore when the shaft 20 is inserted into the hosel 40.

[0155] The disk 704 may further define a disk thickness measured along the longitudinal axis of the shaft. The disk thickness may be from 0.020 inches to 0.100 inches. In some embodiments, the disk thickness may be from 0.020 inches to 0.050 inches, from 0.050 inches to 0.075 inches, or from 0.075 inches to 0.100 inches. In an exemplary embodiment, the disk thickness is 0.040 inches. In another exemplary embodiment, the disk thickness is 0.070 inches. As described above, the disk 704 may be disposed within the hosel bore outside of the shaft 20, and the rod 703 and the cap-type SW support 710 may be disposed within the shaft 20. The disk thickness may be large enough to prevent the stick weight assembly 700 from being pushed further into the shaft 20 over a desired distance.

[0156] In some embodiments, the disk 704 may further include a plurality of ribs 708 (hereinafter also referred to as "ribs"). The plurality of ribs 708 may extend parallel to the longitudinal axis of the shaft 20 and may be disposed on the outer surface of the disk 704. The plurality of ribs 708 can hold the stick weight 730 in a desired position. The plurality of ribs 708 may include from 2 to 10 ribs. In some embodiments, the plurality of ribs 708 may be 2 to 4 ribs, 4 to 6 ribs, 6 to 8 ribs, or 8 to 10 ribs. The plurality of ribs 708 form a clamping fit with the hosel bore 41 and further support the stick weight assembly 700.

[0157] The plurality of ribs 708 may have a rib thickness, which may be from 0.010 inches to 0.025 inches. In some embodiments, the rib thickness may be from 0.010 inches to 0.015 inches, from 0.015 inches to 0.020 inches, or from 0.020 inches to 0.025 inches. In an exemplary embodiment, the rib thickness may be 0.008 inches.

[0158] In some embodiments, the plurality of ribs 708 may extend only along the thickness of the disk 704. In other embodiments, the rib 708 may extend across the thickness of the disk 704 and may further extend into the lower portion 706 of the rod. The plurality of ribs 708 may define a length, which may be from 0.030 inches to 0.050 inches. In some embodiments, the length of the rib may be from 0.030 inches to 0.035 inches, from 0.035 inches to 0.040 inches, from 0.040 inches to 0.045 inches, or from 0.045 inches to 0.050 inches. a) A cap-type stick weight support having a conforming shape

[0159] Here, a cap-type stick weight support having a cavity with a shape conforming to the channel of the stick weight rod will be described. The channel increases the surface area captured by the cap, resulting in a stronger fit. As shown in FIG. 9B, a steel stick weight assembly 700 may include a cap-type stick weight support 710. In some embodiments, the cap-type stick weight support 710 may be disposed at the upper portion of the rod, and as shown in FIG. 9B, the stick weight 730 and the cap-type stick weight support 710 are disposed within the shaft 20. The cap-type stick weight support 710 (hereinafter also referred to as "cap-type SW support" or "cap") may include a first end, a second end, and an outer surface. Referring to FIGS. 9C and 9D, the cap-type SW support 710 may further define a cavity 717 extending from the second end 715 towards the first end 714. The cavity 717 may have a depth measurable along the longitudinal axis. The cavity 717 may have a shape that conforms to the shape of the upper portion and the channel 709.

[0160] In some embodiments, the cap - type SW support 710 may be cast on the upper part 705. In an exemplary embodiment, the cap - type SW support 710 may be cast on the upper part 705 by overmolding. In such an embodiment, a mold is placed on the upper part 705. The mold may allow the material of the cap - type SW support 710 to flow into the channel 709, such that the cap - type SW support 710 forms a shape that conforms to the channel 709. In such an embodiment where the channel has an interlock, the cavity may have a conforming interlock. As described above, further, the interlock can maintain the cap - type SW support in a predetermined position when inserting the stick - weight assembly into the shaft tip, and can maintain the SW support in a predetermined position when the stick - weight assembly is removed from the shaft tip. As described above, the interlock of the cavity may be one or more protrusions, teeth, recesses, threads, or any other interlock feature.

[0161] The cap - type SW support 710 may further have a cap shape that enables easy insertion of the stick - weight assembly 700 into the shaft tip 10, and can provide press - fit / clamping for holding the rod in a predetermined position despite having a diameter smaller than the shaft inner diameter. The cap - type SW support 710 may include a cap outer diameter, a cap inner diameter, a first portion 711, a second portion 712, and a thickness. The first portion 711 may include a dome that facilitates insertion into the shaft 20. The second portion 712 may include a cylindrical body that facilitates centering the stick - weight assembly 700 within the shaft 20. The cap outer diameter and the cap inner diameter may be varied to correspond to the inner diameters of various shafts. The cap outer diameter and the cap inner diameter may further be selected such that the cap - type SW support 710 fits snugly on the upper part 705 and within the shaft bore.

[0162] The cap outer diameter of the cap-type SW support 710 can be measured across the second end 715 in a direction perpendicular to the longitudinal axis. The cap outer diameter can be from 0.15 inches to 0.45 inches. In some embodiments, the cap outer diameter can be from 0.15 inches to 0.20 inches, from 0.20 inches to 0.25 inches, from 0.25 inches to 0.30 inches, from 0.30 inches to 0.35 inches, from 0.35 inches to 0.40 inches, or from 0.40 inches to 0.45 inches. In an exemplary embodiment, the cap outer diameter is 0.28 inches. The cap outer diameter can be sized such that the outer surface of the cap and the inner surface of the shaft fit snugly. The cap-type SW support 710 can prevent rattling of the stick weight 730 by applying a force to the inner surface of the shaft, eliminating the need to use epoxy resin during the manufacturing process.

[0163] The cap inner diameter can be measured across the cavity 717 in a direction perpendicular to the longitudinal axis. The cap inner diameter can be from 0.14 inches to 0.30 inches. In some embodiments, the cap inner diameter can be from 0.14 inches to 0.16 inches, from 0.16 inches to 0.18 inches, from 0.18 inches to 0.20 inches, from 0.20 inches to 0.22 inches, from 0.22 inches to 0.24 inches, from 0.24 inches to 0.26 inches, from 0.26 inches to 0.28 inches, or from 0.28 inches to 0.30 inches. In an exemplary embodiment, the cap inner diameter of the cavity is 0.22 inches. The cap inner diameter of the cavity can be sized such that the cap-type SW support 710 and the stick weight 730 fit snugly. The tension between the cap-type SW support 710 and the stick weight 730 can further prevent rattling of the stick weight 730 within the shaft 20.

[0164] As described above, the cap-type SW support 710 may include a first portion 711 and a second portion 712, where the first portion 711 includes a dome and the second portion 712 includes a cylindrical body. The first portion 711 may have a first portion height measurable from the lower end of the dome upward to the first end. The first portion height may be from 0.05 inches to 0.35 inches. In some embodiments, the first portion height may be from 0.05 inches to 0.10 inches, from 0.10 inches to 0.15 inches, from 0.15 inches to 0.20 inches, from 0.20 inches to 0.25 inches, from 0.25 inches to 0.30 inches, or from 0.30 inches to 0.35 inches. In an exemplary embodiment, the first portion height is 0.14 inches.

[0165] Furthermore, the second portion 712 may have a second portion height measurable from the lower end of the dome downward to the second end. The second portion height may be from 0.10 inches to 0.30 inches. In some embodiments, the second portion height may be from 0.10 inches to 0.12 inches, from 0.12 inches to 0.14 inches, from 0.14 inches to 0.16 inches, from 0.16 inches to 0.18 inches, from 0.18 inches to 0.20 inches, from 0.20 inches to 0.22 inches, from 0.22 inches to 0.24 inches, from 0.24 inches to 0.26 inches, from 0.26 inches to 0.28 inches, or from 0.28 inches to 0.30 inches. In an exemplary embodiment, the second portion height is 0.16 inches.

[0166] As shown in FIG. 9C, the second portion may further include a plurality of ridges 713 (hereinafter also referred to as "ridges") protruding outward from the outer surface 716 of the cap. The plurality of ridges 713 are near the second end 715 of the cap. The plurality of ridges 713 can contact the inner surface of the shaft to further support the stick weight 730. The plurality of ridges 713 may include from 2 to 15 ridges. In some embodiments, the plurality of ridges 713 may be from 2 to 6 ridges, from 6 to 11 ridges, or from 11 to 15 ridges. In an exemplary embodiment, the plurality of ridges 713 includes 6 ridges.

[0167] The plurality of raised portions 713 may have a raised portion shape, and the raised portion shape may be regarded as the cross-section of a plurality of raised portions perpendicular to the longitudinal axis. The raised portion shape may be selected from the group consisting of a triangle, a semi-circle, and an ellipse. Due to the shape of the plurality of raised portions 713, a space for air to escape is created, and the force required to insert the stick weight assembly 700 into the shaft tip 10 can be reduced. Further, due to the raised portion shape, the raised portion 713 can be easily compressed as appropriate. In order to accommodate various shaft diameters of golf clubs, it may be desirable for the raised portion 713 to be compressible. By compressing the raised portion, it becomes possible to use the stick weight assembly 700 with various shafts.

[0168] The length of the raised portion can be measured in a direction parallel to the longitudinal axis, from the second end 715 of the cap upward to the end point of the raised portion. In some embodiments, the cap-type SW support 710 may have raised portions 713 of various lengths. In other embodiments, the cap-type SW support 710 may have raised portions 713 of a constant length. Regardless of whether the cap-type SW support 710 has raised portions 713 of various lengths or raised portions 713 of a constant length, the length of the raised portion may be from 0.10 inches to 0.20 inches. In some embodiments, the length of the raised portion may be from 0.10 inches to 0.11 inches, 0.11 inches to 0.12 inches, 0.12 inches to 0.13 inches, 0.13 inches to 0.14 inches, 0.14 inches to 0.15 inches, 0.15 inches to 0.16 inches, 0.16 inches to 0.17 inches, 0.17 inches to 0.18 inches, 0.18 inches to 0.19 inches, or 0.19 inches to 0.20 inches. In an exemplary embodiment, the length of the raised portion is 0.125 inches. In some embodiments, the raised portion 713 may extend over the entire length of the second portion 712. In other embodiments, the raised portion 713 may extend into the first portion 711 beyond the second portion 712. In other embodiments, the raised portion 713 may extend into the second portion 712. The length of the raised portion affects the amount of force that the stick weight assembly 700 exerts on the shaft inner diameter.

[0169] As described above, the cap-type SW support 710 may be formed of a flexible TPE material. In an exemplary embodiment, the flexible TPE material may have a shore A hardness of 60. The material of the cap-type SW support may have a much greater elastic limit than the material of the stick weight. The material of the cap-type SW support may allow the cap-type SW support 710 to be compressed when the stick weight assembly 700 is inserted into the shaft tip 10, and may allow it to expand when the stick weight assembly 700 is further pushed into the shaft 20. The material of the cap-type SW support may also allow the protrusion 713 to be slightly compressed when disposed within the shaft 20. The tight fit between the protrusion 713 and the shaft 20 supports the stick weight 730 and can attenuate the vibrations generated during impact. 4. Integrated Stick Weight and Stick Weight Support

[0170] Here, a stick weight assembly having a cylindrical stick weight with a dome on top will be described to facilitate manufacturing and insertion and to provide a stronger fit within the shaft. The stick weight may include a protrusion that contacts the inner surface of the shaft, whereby the weight can be centered. Referring to FIGS. 10A-11B, the steel stick weight assemblies 800 or 900 may include an integrated stick weight 830 or 930 and a stick weight support 810 or 910, with the stick weight 830 or 930 and the stick weight support 810 or 910 formed as one piece. This allows the steel stick weight assemblies 800 or 900 to be easily inserted and removed from the shaft tip 10 as needed. The ability to easily remove the steel stick weight assemblies 800 or 900 from the tip of the shaft improves the usability when placing the steel stick weights 830 or 930 within the shaft tip 10 during the manufacturing process.

[0171] The stick weight 830 or 930 may include a cylindrical rod 803 or 903 (referred to herein as the "rod") and a disk 804 or 904. The rod 803 or 903 may have an upper end and a lower end. The lower end of the rod 803 or 903 may be connected to the disk 804 or 904. The stick weight 830 or 930 may be received within the shaft 20 near the tip such that the upper end of the rod 803 or 903 is disposed within the shaft 20 and the disk 804 or 904 abuts against the shaft tip 10. The rod 803 or 903 may be fully received within the shaft 20, and the disk 804 or 904 may protrude from the shaft tip 10.

[0172] The stick weight assembly 800 or 900 may have a weight. In some embodiments, the weight may be from 1 gram to 20 grams. In some embodiments, the weight may be 1 gram, 2 grams, 3 grams, 4 grams, 5 grams, 6 grams, 7 grams, 8 grams, 9 grams, 10 grams, 11 grams, 12 grams, 13 grams, 14 grams, 15 grams, 16 grams, 17 grams, 18 grams, 19 grams, or 20 grams. In some embodiments, the weight may be less than 20 grams, less than 15 grams, less than 10 grams, or less than 5 grams. The size of the disk 804 or 904 can also affect the weight, but to a lesser extent than the length of the rod. As described above, the length of the rod can be a major factor in the weight of the stick weight assembly 800 or 900, and the longer the stick weight 830 or 930, the greater the weight.

[0173] The length of the rod may directly correspond to the weight of the stick weight assembly 800 or 900, and the longer the rod length, the greater the weight. The rods 803 or 903 of the stick weight 830 or 930 may define a rod length measured from the upper end to the lower end along the longitudinal axis of the shaft. The rod length may be from 0.60 inches to 2.10 inches. In some embodiments, the rod length may be from 0.60 inches to 0.70 inches, 0.70 inches to 0.80 inches, 0.80 inches to 0.90 inches, 0.90 inches to 1.00 inches, 1.00 inches to 1.10 inches, 1.10 inches to 1.20 inches, 1.20 inches to 1.30 inches, 1.30 inches to 1.40 inches, 1.40 inches to 1.50 inches, 1.50 inches to 1.60 inches, 1.60 inches to 1.70 inches, 1.70 inches to 1.80 inches, 1.80 inches to 1.90 inches, 1.90 inches to 2.00 inches, or 2.00 inches to 2.10 inches. In some embodiments, the rod length may be less than 2.00 inches, less than 1.90 inches, less than 1.80 inches, less than 1.70 inches, less than 1.60 inches, less than 1.50 inches, less than 1.40 inches, less than 1.30 inches, less than 1.20 inches, less than 1.10 inches, less than 1.00 inches, less than 0.90 inches, less than 0.80 inches, or less than 0.70 inches. In an exemplary embodiment, the rod length is 1.02 inches. In another exemplary embodiment, the rod length is 1.79 inches.

[0174] Rod 803 or 903 may further define a rod diameter measured perpendicular to the longitudinal axis of the shaft. In some embodiments, the rod diameter may be constant throughout the rod. In these embodiments, the rod diameter may be from 0.275 inches to 0.300 inches. In some embodiments, the rod diameter may be from 0.275 inches to 0.280 inches, from 0.280 inches to 0.285 inches, from 0.290 inches to 0.295 inches, or from 0.295 inches to 0.300 inches. In an exemplary embodiment, the rod diameter may be 0.288 inches. In another embodiment, the rod diameter may vary such that it is maximum at the center of rod 803 or 903. In other embodiments, the rod diameter may vary such that it increases towards the upper end. The rod diameter may be sized such that rod 803 or 903 can be easily disposed within the shaft tip 10.

[0175] The upper end of the rod may further include dome 807 or 907. Dome 807 or 907 can facilitate the insertion of stick weight assembly 800 or 900 into shaft 20. Dome 807 or 907 may have a dome shape, which may be considered as the cross-section of the dome parallel to the longitudinal axis. The dome shape may be selected from the group consisting of a semi-circle, a semi-ellipse, a semi-oval, and a triangle. With the aforementioned dome shape, stick weight assembly 800 or 900 can be inserted into shaft tip 10 quickly and easily.

[0176] As described above, the disk 804 or 904 may be connected to the lower end of the rod and sized to abut against the shaft tip 10. The disk 804 or 904 may define a disk diameter measured across the surface of the disk 804 or 904 in a direction perpendicular to the longitudinal axis. The disk diameter may be from 0.20 inches to 0.40 inches. In some embodiments, the disk diameter may be from 0.20 inches to 0.25 inches, from 0.25 inches to 0.30 inches, from 0.30 inches to 0.35 inches, or from 0.35 inches to 0.40 inches. In an exemplary embodiment, the disk diameter is 0.35 inches.

[0177] The disk 804 or 904 may further define a disk thickness measured along the longitudinal axis of the shaft. The disk thickness may be from 0.020 inches to 0.100 inches. In some embodiments, the disk thickness may be from 0.020 inches to 0.050 inches, from 0.050 inches to 0.075 inches, or from 0.075 inches to 0.100 inches. In an exemplary embodiment, the disk thickness is 0.040 inches. In another exemplary embodiment, the disk thickness is 0.070 inches. As described above, the disk 804 or 904 may be disposed within the hosel bore outside of the shaft 20, and the rod 803 or 903 and support features may be disposed within the shaft 20. The disk thickness may be large enough to prevent the stick weight assembly 800 or 900 from being fully inserted into the shaft 20 over a desired distance. This facilitates manufacturing and allows the stick weight assembly 800 or 900 to be placed quickly and consistently within the shaft bore.

[0178] In some embodiments, the disk 804 or 904 may further include a plurality of disk ribs 808 or 908 (hereinafter also referred to as "ribs"). The plurality of disk ribs 808 or 908 may be disposed on the outer surface of the disk 804 or 904 extending parallel to the longitudinal axis of the shaft 20. The plurality of disk ribs 808 or 908 can hold the stick weight 830 or 930 in a desired position. The plurality of disk ribs 808 or 908 may include 2 to 10 ribs. In some embodiments, the plurality of disk ribs 808 or 908 may be 2 to 4 ribs, 4 to 6 ribs, 6 to 8 ribs, or 8 to 10 ribs.

[0179] The plurality of disk ribs 808 or 908 may have a thickness, which may be 0.010 inches to 0.025 inches. In some embodiments, the thickness of the rib may be 0.010 inches to 0.015 inches, 0.015 inches to 0.020 inches, or 0.020 inches to 0.025 inches. In an exemplary embodiment, the thickness of the rib may be 0.008 inches. The thickness of the rib may be small enough so as not to interfere with the inner surface of the hosel bore when the shaft 20 is inserted into the hosel 40.

[0180] In some embodiments, the plurality of disk ribs 808 or 908 may extend only along the thickness of the disk 804 or 904. In other embodiments, the disk rib 808 or 908 may extend across the thickness of the disk 804 or 904 and further into the lower portion of the rod 803 or 903. The plurality of disk ribs 808 or 908 may define a length, which may be 0.030 inches to 0.050 inches. In some embodiments, the length of the rib may be 0.030 inches to 0.035 inches, 0.035 inches to 0.040 inches, 0.040 inches to 0.045 inches, or 0.045 inches to 0.050 inches. a) Stick weight support

[0181] Here, a stick weight support integrated with the rod of the stick weight will be described. The integrated stick weight support facilitates manufacturing and insertion into the shaft. As shown in FIGS. 10A - 10C and FIGS. 11A - 11B, the steel stick weight assembly 800 or 900 may include a stick weight support (hereinafter referred to as the "SW support"). The SW support may include a plurality of ridges 809 or 909 (hereinafter also referred to as "ridges"), and the plurality of ridges 809 or 909 may be arranged along the rod 803 or 903 and / or along the disk 804 or 904. The plurality of ridges 809 or 909 may be arranged along the stick weight 830 or 930 and may extend in a direction parallel to the longitudinal axis. Further, the plurality of ridges 809 or 909 may protrude outward from the stick weight 830 or 930 toward the inner surface of the shaft.

[0182] In some embodiments, the plurality of ridges 809 or 909 may be continuous along the length of the steel stick weight 830 or 930. In some embodiments, the plurality of ridges 809 or 909 may be arranged only on the rod 803 or 903. In some embodiments, the plurality of ridges 809 or 909 may be arranged only on the disk 804 or 904. In some embodiments, the plurality of ridges 809 or 909 may be discontinuous along the length of the steel stick weight 830 or 930. In such embodiments, the individual discontinuous ridges of the plurality of ridges 809 or 909 may include a plurality of ridge segments.

[0183] The plurality of ridges 809 or 909 can contact the inner surface of the shaft 20 to further support the stick weight 830 or 930. The plurality of ridges 809 or 909 may include 2 to 10 ridges. In some embodiments, the plurality of ridges 809 or 909 may be 2 to 4 ridges, 4 to 6 ridges, 6 to 8 ridges, or 8 to 10 ridges.

[0184] In embodiments where the plurality of raised portions 809 or 909 are discontinuous, the individual raised portions may comprise a plurality of raised portion segments. The plurality of raised portion segments may comprise from 2 to 10 raised portion segments. In some embodiments, the plurality of raised portion segments may be 2 to 4 raised portion segments, 4 to 6 raised portion segments, 6 to 8 raised portion segments, or 8 to 10 raised portion segments. The plurality of raised portion segments can support the stick weight assembly 800 or 900 by providing support at desired locations along the length of the SW support.

[0185] Each raised portion segment of the plurality of raised portion segments may have a segment length. In some embodiments, the segment length may be constant. In other embodiments, the segment length may vary. In some embodiments, the segment length may be from 0.05 inches to 1.00 inches. In some embodiments, the segment length may be 0.05 inches to 0.15 inches, 0.15 inches to 0.25 inches, 0.25 inches to 0.35 inches, 0.35 inches to 0.45 inches, 0.45 inches to 0.55 inches, 0.55 inches to 0.65 inches, 0.65 inches to 0.75 inches, 0.75 inches to 0.85 inches, 0.85 inches to 0.95 inches, or 0.95 inches to 1.00 inches. The length of each raised portion segment may be selected such that a desired amount of support is provided between the stick weight 830 or 930 and the shaft 20 at different points along the length of the stick weight 830 or 930.

[0186] The plurality of raised portions 809 or 909 may have a raised portion shape, and the raised portion shape may be regarded as a cross-section of a plurality of raised portions perpendicular to the longitudinal axis. The raised portion shape may be selected from the group consisting of a triangle, a semi-circle, and an ellipse. The raised portion shape creates a space for air to escape and can reduce the force required to insert the stick weight assembly 800 or 900 into the shaft tip 10. Further, the raised portion shape makes the raised portion compressible as appropriate. In order to accommodate various shaft inner diameters, it may be desirable for the raised portions 809 or 909 to be compressible. When the raised portions are compressed, it becomes easier to use the stick weight assembly 800 or 900 with various shafts. The raised portions 809 or 909 apply an outward force to the inner surface to create a press fit / clamping fit between the stick weight assembly 800 or 900 and the shaft inner surface, preventing rattling of the stick weight 830 or 930.

[0187] As described above, the stick weight assembly 800 or 900 may be formed from a soft rubber-like material. Further, a steel stick weight assembly 800 or 900 may be formed by injection molding a flexible TPE material having a hardness of Shore A hardness 20 to Shore A hardness 80. This material allows the stick weight assembly 800 or 900 to be compressed when the stick weight assembly 800 or 900 is inserted into the shaft tip 10 and expands when the stick weight assembly 800 or 900 is further pushed into the shaft 20. This material also allows the raised portions 809 or 909 to be slightly compressed when the raised portions 809 or 909 are placed within the shaft 20. The tight fit between the raised portions 809 or 909 and the shaft 20 supports the stick weight 830 or 930 and can dampen the vibrations generated during impact. 5. Integrated Stick Weight and Stick Weight Support Made of Multiple Materials

[0188] Here, a stick weight assembly comprising a cylindrical stick weight made of a plurality of materials and having a dome at the top will be described. By having an integral stick weight and a dome at the top, not only is manufacturing and insertion facilitated, but a stronger fit within the shaft can be provided. Further, by using a plurality of materials, additional mass can be added to the stick weight and the stick weight can be press-fitted into the shaft bore. Referring to FIGS. 12A - 12D, a steel stick weight assembly 1000 may be configured by integrating a stick weight 1030 and a stick weight support (hereinafter referred to as "SW support"), that is, the stick weight 1030 and the SW support may be formed as an integral unit. Thereby, the steel stick weight assembly 1000 can be easily inserted into the shaft tip 10 and can be removed from the shaft tip 10 as appropriate. The ability to easily remove the steel stick weight assembly 1000 from the tip of the shaft improves the usability when placing the steel stick weight 1030 within the shaft tip 10 during the manufacturing process.

[0189] The stick weight 1030 may include a cylindrical rod 1003 (referred to as "rod" herein) and a disk 1004. The rod 1003 may have an upper end and a lower end. The lower end of the rod 1003 may be connected to the disk 1004. The stick weight 1030 may be received within the shaft 20 near the shaft tip 10 such that the upper end of the rod 1003 is disposed within the shaft 20 and the disk 1004 abuts against the shaft tip 10. The rod 1003 may be fully received within the shaft 20 and the disk 1004 may protrude from the shaft tip 10.

[0190] The stick weight assembly 1000 may have a weight. In some embodiments, the weight may be from 1 gram to 20 grams. In some embodiments, the weight may be 1 gram, 2 grams, 3 grams, 4 grams, 5 grams, 6 grams, 7 grams, 8 grams, 9 grams, 10 grams, 11 grams, 12 grams, 13 grams, 14 grams, 15 grams, 16 grams, 17 grams, 18 grams, 19 grams, or 20 grams. In some embodiments, the weight may be less than 20 grams, less than 15 grams, less than 10 grams, or less than 5 grams. The size of the disk can also affect the weight, but to a lesser extent than the length of the rod. The length of the rod can be a major factor in the weight of the stick weight assembly 1000.

[0191] The length of the rod can directly correspond to the weight of the stick weight assembly 1000, that is, the longer the length of the rod, the greater the weight. The rod 1003 of the stick weight 1030 may define a rod length measured from the upper end to the lower end along the longitudinal axis of the shaft 20. The rod length may be from 0.50 inches to 2.10 inches. In some embodiments, the rod length may be from 0.50 inches to 0.60 inches, 0.60 inches to 0.70 inches, 0.70 inches to 0.80 inches, 0.80 inches to 0.90 inches, 0.90 inches to 1.00 inches, 1.00 inches to 1.10 inches, 1.10 inches to 1.20 inches, 1.20 inches to 1.30 inches, 1.30 inches to 1.40 inches, 1.40 inches to 1.50 inches, 1.50 inches to 1.60 inches, 1.60 inches to 1.70 inches, 1.70 inches to 1.80 inches, 1.80 inches to 1.90 inches, 1.90 inches to 2.00 inches, or 2.00 inches to 2.10 inches. In some embodiments, the rod length may be less than 2.00 inches, less than 1.90 inches, less than 1.80 inches, less than 1.70 inches, less than 1.60 inches, less than 1.50 inches, less than 1.40 inches, less than 1.30 inches, less than 1.20 inches, less than 1.10 inches, less than 1.00 inches, less than 0.90 inches, less than 0.80 inches, or less than 0.70 inches. In an exemplary embodiment, the rod length is 0.85 inches. In another exemplary embodiment, the rod length is 1.80 inches.

[0192] The rod 1003 may further define a rod diameter measured perpendicular to the longitudinal axis of the shaft. In some embodiments, the rod diameter may be constant throughout the rod 1003. In these embodiments, the rod diameter may be from 0.275 inches to 0.300 inches. In some embodiments, the rod diameter may be from 0.275 inches to 0.280 inches, from 0.280 inches to 0.285 inches, from 0.290 inches to 0.295 inches, or from 0.295 inches to 0.300 inches. In an exemplary embodiment, the rod diameter may be 0.288 inches. In another embodiment, the rod diameter may vary such that it is maximum at the center of the rod 1003. In other embodiments, the rod diameter may vary such that it increases towards the upper end. In other embodiments, the rod diameter may vary such that it increases towards the lower end. The rod diameter may be selected such that the rod 1003 can be easily placed within the shaft tip 10, and the plurality of ridges 1009 described below can engage the inner surface of the shaft.

[0193] The upper end of the rod 1003 may further include a dome 1007. The dome allows the stick weight assembly 1000 to be easily inserted into the shaft 20 during the manufacturing process. The dome 1007 may have a dome shape, which may be considered as the cross-section of the dome structure perpendicular to the longitudinal axis. The dome shape may be selected from the group consisting of a semi-circle, semi-ellipse, semi-oval, and triangle. With the aforementioned dome shape, the stick weight assembly 1000 can be quickly and easily inserted into the shaft tip 10.

[0194] The steel stick weight assembly 1000 may further include a plurality of holes 1010 (hereinafter also referred to as "holes"), and the plurality of holes 1010 are arranged at positions along the length of the rod 1003. This arrangement of the plurality of holes 1010 can support the stick weight assembly 1000 and maintain it centered throughout the injection molding process described in detail below. The plurality of holes 1010 may include 2 to 10 holes. In some embodiments, the plurality of holes 1010 may be 2 to 4 holes, 4 to 6 holes, 6 to 8 holes, or 8 to 10 holes. The plurality of holes 1010 may be arranged centrally along the longitudinal axis and may penetrate the stick weight assembly 1000 in a direction perpendicular to the longitudinal axis.

[0195] As described above, the disk 1004 may be connected to the lower end of the rod and may be sized to abut the shaft tip 10. The disk 1004 may define a disk diameter measured across the surface of the disk 1004 in a direction perpendicular to the longitudinal axis. The disk diameter may be 0.20 inches to 0.40 inches. In some embodiments, the disk diameter may be 0.20 inches to 0.25 inches, 0.25 inches to 0.30 inches, 0.30 inches to 0.35 inches, or 0.35 inches to 0.40 inches. In an exemplary embodiment, the disk diameter is 0.35 inches.

[0196] The disk 1004 may further define a disk thickness measured along the longitudinal axis of the shaft. The disk thickness may be from 0.020 inches to 0.100 inches. In some embodiments, the disk thickness may be from 0.020 inches to 0.050 inches, from 0.050 inches to 0.075 inches, or from 0.075 inches to 0.100 inches. In an exemplary embodiment, the disk thickness is 0.040 inches. As described above, the disk 1004 may be disposed within the hosel bore outside of the shaft 20, and the rod 1003 and support features are disposed within the shaft 20. The disk thickness may be large enough to prevent the stick weight assembly 1000 from being inserted into the shaft 20 beyond a desired distance. This facilitates manufacturing and allows the stick weight assembly 1000 to be placed quickly and consistently within the shaft bore.

[0197] In some embodiments, the disk 1004 may further include a plurality of disk ribs 1008 (hereinafter also referred to as "disk ribs"). The plurality of disk ribs 1008 may extend parallel to the longitudinal axis of the shaft 20 and may be disposed on the outer surface of the disk 1004. The plurality of disk ribs 1008 can function as additional support means for holding the stick weight 1030 in a desired position. The plurality of disk ribs 1008 may include from 2 to 10 ribs. In some embodiments, the plurality of disk ribs 1008 may be from 2 to 4 ribs, from 4 to 6 ribs, from 6 to 8 ribs, or from 8 to 10 ribs.

[0198] The plurality of disk ribs 1008 may have a thickness, which may be from 0.010 inches to 0.025 inches. In some embodiments, the rib thickness may be from 0.010 inches to 0.015 inches, from 0.015 inches to 0.020 inches, or from 0.020 inches to 0.025 inches. In an exemplary embodiment, the rib thickness may be 0.008 inches. The rib thickness may be small enough so as not to interfere with the inner surface of the hosel bore when the shaft 20 is inserted into the hosel 40.

[0199] In some embodiments, the plurality of describs 1008 may extend only along the thickness of the disk 1004. In other embodiments, the describs 1008 may extend across the thickness of the disk 1004 and further into the lower portion of the rod 1003. The plurality of describs 1008 may define a length, which may be from 0.030 inches to 0.050 inches. In some embodiments, the length of the rib may be from 0.030 inches to 0.035 inches, from 0.035 inches to 0.040 inches, from 0.040 inches to 0.045 inches, or from 0.045 inches to 0.050 inches. a) Other alternative integrated stick weight supports

[0200] Here, a stick weight support integrated with the rod of the stick weight will be described. The integrated stick weight support facilitates manufacturing and insertion into the shaft. As shown in FIGS. 12A-12D, the steel stick weight assembly 1000 may include a stick weight support (hereinafter referred to as "SW support"). The SW support may include a plurality of ridges 1009 (hereinafter also referred to as "ridges"), and the plurality of ridges 1009 may be arranged along the rod 1003 and / or along the disk 1004. The plurality of ridges 1009 may be arranged along the stick weight 1030 and may extend in a direction parallel to the longitudinal axis. Further, the plurality of ridges 1009 may protrude outward from the stick weight 1030 toward the inner surface of the shaft.

[0201] In some embodiments, the plurality of raised portions 1009 may be continuous along the length of the stick weight 1030. In some embodiments, the plurality of raised portions 1009 may be disposed only on the rod 1003. In some embodiments, the plurality of raised portions 1009 may be disposed only on the disk 1004. In some embodiments, the plurality of raised portions 1009 may be discontinuous along the length of the stick weight 1030. In such embodiments, the plurality of raised portions 1009 may comprise rib segments such that the individual ribs of the plurality of raised portions are constituted by the plurality of rib segments.

[0202] The plurality of raised portions 1009 can function as additional support means for holding the stick weight 1030 in a desired position. The plurality of raised portions 1009 may comprise from 2 to 10 raised portions. In some embodiments, the plurality of raised portions 1009 may be 2 to 4 raised portions, 4 to 6 raised portions, 6 to 8 raised portions, 8 to 10 raised portions.

[0203] In embodiments where the plurality of raised portions 1009 are discontinuous, the individual raised portions may comprise a plurality of raised portion segments. The plurality of raised portion segments may comprise from 2 to 10 raised portion segments. In some embodiments, the plurality of raised portions may be 2 to 4 raised portion segments, 4 to 6 raised portion segments, 6 to 8 raised portion segments, 8 to 10 raised portion segments. The plurality of raised portion segments can support the stick weight assembly by providing support at desired positions along the length of the SW support.

[0204] Each raised portion segment of the plurality of raised portion segments may have a segment length. In some embodiments, the segment length may be constant. In other embodiments, the segment lengths may vary. In some embodiments, the segment length may be from 0.05 inches to 1.00 inches. In some embodiments, the segment length may be from 0.05 inches to 0.15 inches, from 0.15 inches to 0.25 inches, from 0.25 inches to 0.35 inches, from 0.35 inches to 0.45 inches, from 0.45 inches to 0.55 inches, from 0.55 inches to 0.65 inches, from 0.65 inches to 0.75 inches, from 0.75 inches to 0.85 inches, from 0.85 inches to 0.95 inches, or from 0.95 inches to 1.00 inches. The length of each raised portion segment may be selected such that a desired amount of support is provided between the stick weight and the shaft at different points along the length of the stick weight.

[0205] The plurality of raised portions 1009 may have a raised portion shape, which may be considered as the cross-section of a plurality of raised portions perpendicular to the longitudinal axis. The raised portion shape may be selected from the group consisting of a triangle, a semi-circle, and an ellipse. The raised portion shape creates a space for air to escape and can reduce the force required to insert the stick weight assembly 1000 into the shaft tip 10. Further, the raised portion shape makes the raised portion 1009 compressible as appropriate. Since the inner diameter of the shaft of a golf club can vary greatly, it may be desirable for the raised portion 1009 to be compressible. By compressing the raised portion 1009, it becomes possible to apply the stick weight assembly 1000 to various shafts.

[0206] In one embodiment, the stick weight assembly 1000 may be formed from a soft rubber-like material. Further, the stick weight assembly 1000 may be formed by injection molding a flexible TPE material having a Shore A hardness of 20 to Shore A hardness of 80. In some embodiments, the hardness may be Shore A hardness of 30 to Shore A hardness of 40, Shore A hardness of 40 to Shore A hardness of 50, Shore A hardness of 50 to Shore A hardness of 60, Shore A hardness of 60 to Shore A hardness of 70, or Shore A hardness of 70 to Shore A hardness of 80. This material allows the stick weight assembly 1000 to be compressed when the stick weight assembly 1000 is inserted into the shaft tip 10, and allows the stick weight assembly 1000 to expand when it is further pushed into the shaft 20. This material also allows the raised portion 1009 to be slightly compressed when disposed on the shaft 20. The tight fit between the raised portion 1009 and the shaft 20 supports the stick weight 1030 and can attenuate the vibrations generated during impact.

[0207] In other embodiments, the steel stick weight assembly 1000 may be formed from two separate materials. The outer portion 1041 may be formed from a soft rubber-like material similar to that described above, and the inner portion 1040 may be formed from metal. In such an embodiment, the outer portion 1041 may be cast onto the inner portion 1040. The presence of the plurality of holes 1010 described above allows the inner portion 1040 to remain centered in the mold during the casting process.

[0208] The outer portion 1041 may include a material having an outer portion density, and the inner portion 1040 may include a material having an inner portion density. The outer portion density may be less than the inner portion density. By using two different materials, the mass of the stick weight assembly 1000 can be increased while providing the advantages of the soft material as described above.

[0209] The aforementioned stick weight assembly enables the reliable implementation of a stick weight on various shafts while preventing unwanted vibrations within the shaft. The ability to reliably implement the stick weight allows for easier use of the stick weight in a manufacturing setting, reducing the time and cost associated with manufacturing. Further, the ability to reliably implement the stick weight allows for an increase in the adhesive area for the epoxy resin to secure the tip of the shaft within the hosel. A larger adhesive area enables a reduction in the height of the hosel, reducing the weight in that area and allowing that weight to be distributed to different areas of the club head. The ability to redistribute the weight enables a reduction in the center of gravity (CG) of the club head, increasing the launch angle and reducing the backspin. III. EXAMPLES 1. Example 1

[0210] Example 1 provides a comparison between a conventional graphite stick weight and a novel graphite stick weight, as well as a comparison between a conventional steel stick weight and a novel steel stick weight. More specifically, Example 1 shows the comparison results regarding dimensions between various novel stick weight assemblies and conventional stick weight assemblies, as shown in Tables 1 and 2 below.

[0211] Here, a conventional graphite embodiment (hereinafter referred to as TGE) 100, a conventional steel embodiment (hereinafter referred to as TSE) 200, a first graphite embodiment (hereinafter referred to as FGE) 300, a first steel embodiment (hereinafter referred to as FSE) 500, a second steel embodiment (hereinafter referred to as SSE) 600, a third steel embodiment (hereinafter referred to as ThSE) 700, a fourth steel embodiment (FoSE) 800, a fifth steel embodiment (FiSE) 900, a sixth steel embodiment (SiSE), and a seventh steel embodiment (SeSE) 1000 will be described. The following table shows a direct comparison between a conventional stick weight assembly and a stick weight assembly of an exemplary embodiment.

Table 1

[0212] Table 1 shows the differences between TGE and FGE. FGE has dimensions and physical properties similar to those of TGE. The dimensions shown in Table 1 do not include any support features. FGE is dimensionally very similar to TGE, but FGE also has support features that increase both the length and width of the stick weight assembly. By increasing the length and width, it becomes easier to fix the stick weight assembly within the shaft.

Table 2

[0213] Table 2 shows the differences between the TSE and several steel embodiments. The dimensions of several steel embodiments are similar to those of the TSE. The main differences between the steel embodiments are the differences in the rod length and weight of the embodiments. The rod length of the new steel embodiment is approximately 1 inch shorter than that of the conventional steel embodiment. The difference in rod length leads to the difference in the weight of the embodiment. The weight of the new steel embodiment is approximately 75% of the weight of the conventional steel embodiment. Even if the new steel embodiment can only achieve 75% of the weight ensured by the conventional steel embodiment, as described in Example 2 below, through a dramatic improvement in durability, the new steel embodiment can be successfully realized. By successfully realizing the new steel embodiment, furthermore, the hosel can be shortened. As described above, the outer diameter of the hosel can be reduced by up to 0.020 inches, and the height of the hosel can be reduced by up to 0.180 inches. By changing these hosel dimensions, a mass of up to 13 grams can be reduced. And this reduced mass can be redistributed within the clubhead as desired to improve performance characteristics such as increasing the MOI or decreasing the CGy. A larger MOI results in a more consistent and forgiving golf clubhead, and a smaller CGy results in a high-loft shot with less spin. 2. Example 2: Durability Test of Graphite Stick Weight

[0214] Example 2 shows the comparison results related to a graphite embodiment for testing with a support feature and a graphite embodiment of a control group without a support feature. Here, a graphite embodiment for testing having the same structure as the graphite embodiment of the control group will be described. The graphite embodiment for testing is different from the graphite embodiment of the control group in that it has a support feature in the form of a cap. The height of the cap is 0.35 inches and the width of the cap is 0.18 inches. The graphite embodiment of the control group does not have a cap. The height of both the graphite embodiment for testing and the graphite embodiment of the control group is 2.11 inches. Extreme temperature tests were performed on both the graphite embodiment for testing and the graphite embodiment of the control group. The extreme temperature test consists of creating 5 clubs and placing them in a freezer until they reach approximately 9 degrees Fahrenheit. Then, one club is taken out of the freezer and 30 shots are taken with that club over 12 to 15 minutes. After finishing the 30 shots, the club is placed in an oven and left in the oven until the club reaches approximately 189 degrees Fahrenheit. When that temperature is reached, the club is taken out of the oven and 30 shots are taken with that club. The following table shows a direct comparison of the results.

Table 3

Table 4

[0215] The graphite embodiment for testing passed both low and high temperatures without breaking upon impact. In the graphite embodiment of the control group, only 2 out of 5 clubs advanced to the high temperature stage. Neither of these 2 clubs completed the high temperature stage without breaking.

[0216] The first graphite stick weight assembly has a 100% pass rate in the extreme temperature test when compared to the second graphite stick weight assembly. That is, by having a support feature, in this case a cap, the stick weight is stable within the shaft and does not rattle during a golf swing. 3. Example 3: Comparison Results between a Club with a Tip Weight and a Club with a Stick Weight

[0217] Example 3 shows the comparison results between a control group golf club head with a tip weight (hereinafter referred to as the "control group golf club head") and a test iron with a steel stick weight (hereinafter referred to as the "test golf club head"). As described above, the tip weight is a short cylindrical weight disposed within the hosel and abutting against the tip of the shaft. Further, as described above, the stick weight is an elongated cylindrical weight similar to that in FIG. 6B, with most of it disposed within the shaft. By using a stick weight instead of a tip weight, the hosel can be shortened.

[0218] Here, a test iron and a control iron having a similar structure will be described. The test golf club head is different from the control golf club head in that it has a stick weight in the shaft instead of a tip weight disposed in the hosel bore. Due to this stick weight, a stick weight assembly can be disposed in the shaft as outlined below, so that the design of the hosel can be shortened. In the control golf club head, the outer diameter of the hosel is 0.540 inches and the height of the hosel is 1.93 inches. In contrast, in the test golf club head, the outer diameter of the hosel is 0.520 inches and the height of the hosel is 1.75 inches. That is, the difference in the outer diameter of the hosel is 0.020 inches and the difference in the height of the hosel is 0.180 inches. Due to this dimensional difference, about 9 grams of mass is reduced between the test golf club head and the control golf club head. In the test club, this reduced mass can be redistributed to other parts of the golf club to lower the CG with respect to the Y-axis and increase the ball speed.

[0219] Tests were conducted to examine the differences in ball speed, carry distance, and offline distance (i.e., the distance to the left / right of the targeted target line) at different impact points within the club face. This test consisted of hitting 5 shots at each impact point within the club face (performed by a robot for accuracy and reproducibility). The impact points were set before the robot swung the club. In Table 5, the impact positions were taken from the center of the club in the heel-to-toe direction from the leading edge towards the crown. In Table 6, the impact positions vary within the face and are outlined in Table 7 below. In Table 7, the center of the club face refers to the center of the club in the heel-to-toe direction. Since it was found that 85% of the shots were hit within 0.800 inches from the leading edge, only these shots were considered in this test.

Table 5

Table 6

Table 7

[0220] As shown in Table 5, the ball speed of the test golf club head with a stick weight and a short hosel is about 1 MPH faster than that of the control group golf club head. This is because the short length of the hosel lowers the CG on the Y-axis. When the CG on the Y-axis is low, the spin of the ball decreases and the carry distance becomes longer. As shown in Table 6, the test golf club head with a stick weight and a short hosel had an average carry distance increase of 4.39 yards at different impact positions specified in Table 7.

[0221] As described above, by adding a stick weight instead of a tip weight, the dimensions of the hosel can be reduced. By being able to reduce the dimensions of the hosel, a mass of up to 9 grams can be reduced, and this mass can be distributed throughout the golf club head as desired. As a result, the CG can be reduced, so the ball speed becomes faster overall and the carry distance can be extended. 4. Example 4: Comparison between Conventional and New

[0222] Example 4 shows a comparison of the assembly procedures between a conventional stick weight assembly and the above-described stick weight assembly. The conventional stick weight assembly includes multiple steps using epoxy resin, resulting in waste of epoxy resin and requiring more steps to assemble the club. The new stick weight assembly reduces waste of epoxy resin by reducing the steps that require epoxy resin.

[0223] The conventional stick weight assembly procedure included: (1) preparing the stick weight; (2) preparing the epoxy resin; (3) applying the epoxy resin onto the block; (4) rolling the stick weight in the epoxy resin; (5) preparing the shaft; (6) inserting the stick weight into the shaft; (7) applying the epoxy resin to the end of the shaft; (8) preparing the golf club head with a hosel; (9) applying the epoxy resin into the hosel; (10) placing the shaft into the hosel of the golf club head; and (11) wiping off the excess epoxy resin from the combined golf club hosel and shaft.

[0224] The new stick weight assembly procedure is: (1) preparing the stick weight; (2) preparing the support feature; (3) placing the support feature onto the stick weight to create a stick weight assembly; (4) preparing the shaft; (5) inserting the stick weight assembly into the tip of the shaft; (6) preparing the epoxy resin; (7) preparing the club head; (8) putting the epoxy resin into the hosel portion of the club head; and (9) putting the tip of the shaft into the hosel portion of the club head.

[0225] In comparison, the new assembly procedure includes 9 steps, while the conventional assembly procedure includes 11 steps. Out of these 9 steps, only 2 are related to the epoxy resin, whereas in the conventional assembly procedure, out of 11 steps, 5 are related to the epoxy resin. Thus, it changes such that only 22% of the entire procedure is related to the epoxy resin, compared to 45% of the entire procedure being related to the epoxy resin before. Since the amount of epoxy resin used has decreased, the wasted epoxy resin has also decreased. The new stick weight assembly process is simpler and less expensive. Item

[0226] Item 1. A stick weight assembly for use within a shaft of a golf club, the shaft including a shaft inner surface defining a shaft bore, the stick weight assembly including a stick weight and a stick weight support, the stick weight being a rod sized to be inserted into the shaft bore, the rod having a rod upper end and a rod lower end, the rod upper end defining an outer upper end shape, the rod including the rod and a disk sized to be connected to the rod lower end and abut against a tip end of the shaft, the stick weight support including a first end, a second end, and a first portion having an outer surface defining a dome, the dome being sized to be inserted into the shaft, and a second portion connected to the first portion, the second portion including an outer surface and a plurality of ridges sized to project outwardly from the outer surface and engage the shaft inner surface, the stick weight support defining a cavity extending from the second end toward the first end, the cavity being configured to receive the rod upper end, the stick weight assembly.

[0227] Item 2. The stick weight assembly according to Item 1, wherein the rod upper end defines an outer upper end shape and the cavity defines a cavity shape complementary to the outer upper end shape.

[0228] Item 3. The stick weight assembly according to Item 1, wherein the stick weight assembly is configured to be disposed within a hollow graphite shaft.

[0229] Item 4. The stick weight assembly according to Item 2, wherein the stick weight assembly is disposed at a tip end of the shaft.

[0230] Item 5. The stick weight assembly according to Item 1, wherein the stick weight support includes a material selected from the group consisting of a thermoplastic styrene block copolymer (TPS or TPE-s), a thermoplastic polyolefin elastomer (TPO or TPE-o), and a thermoplastic vulcanizate (TPV or TPE-v).

[0231] Item 6. The stick weight assembly according to item 1, wherein the rod has a length of less than 2.70 inches.

[0232] Item 7. The stick weight assembly according to item 1, wherein the rod has a rod diameter of 0.20 inches to 0.40 inches.

[0233] Item 8. The stick weight assembly according to item 1, wherein the stick weight comprises a material selected from the group consisting of aluminum, aluminum alloy, stainless steel, stainless steel alloy, tungsten, or tungsten alloy.

[0234] Item 9. The stick weight assembly according to item 1, wherein the disk has a thickness of 0.025 inches to 0.125 inches.

[0235] Item 10. The stick weight assembly according to item 1, wherein the disk has a disk diameter of 0.20 inches to 0.40 inches.

[0236] Item 11. The stick weight assembly according to item 2, wherein the stick weight assembly is permanently disposed, in part, within the tip of the shaft.

[0237] Item 12. A golf club comprising a club head, a shaft having a shaft bore, a grip, a hosel having a hosel bore, and a stick weight assembly having a stick weight and a stick weight support, wherein the stick weight is a rod sized to be inserted into the shaft bore, the rod having a rod upper end and a rod lower end, the rod upper end defining an outer upper end shape, and comprising a disk sized to be connected to the rod lower end and abut against the tip of the shaft; the stick weight support comprising a first end, a second end, and a first portion having an outer surface defining a dome, the dome being sized to be inserted into the shaft, and a second portion connected to the first portion, the second portion having an outer surface and a plurality of ridges sized to project outward from the outer surface and engage the inner surface of the shaft; the plurality of ridges having a ridge shape selected from the group consisting of a triangle, a semi-circle, and an ellipse; the stick weight support defining a cavity extending from the second end toward the first end, the cavity being configured to receive the upper end of the rod.

[0238] Item 13. The stick weight assembly according to item 12, wherein the upper end of the rod defines an outer upper end shape and the cavity defines a cavity shape complementary to the outer upper end shape.

[0239] Item 14. The stick weight assembly according to item 12, wherein the stick weight assembly is partially and permanently disposed within the tip of the shaft.

[0240] Item 15. The stick weight assembly according to item 12, wherein the stick weight support comprises a material selected from the group consisting of a thermoplastic styrene block copolymer (TPS or TPE-s), a thermoplastic polyolefin elastomer (TPO or TPE-o), and a thermoplastic vulcanizate (TPV or TPE-v).

[0241] Item 16. The stick weight assembly according to item 12, wherein the stick weight comprises a material selected from the group consisting of aluminum, aluminum alloy, stainless steel, stainless steel alloy, tungsten, or tungsten alloy.

[0242] Item 17. The stick weight assembly according to item 12, wherein the rod has a length of less than 2.70 inches.

[0243] Item 18. The stick weight assembly according to item 12, wherein the rod has a rod diameter of 0.20 inches to 0.40 inches.

[0244] Item 19. The stick weight assembly according to item 12, wherein the disk has a thickness of 0.025 inches to 0.125 inches.

[0245] Item 20. The stick weight assembly according to item 12, wherein the disk has a disk diameter of 0.20 inches to 0.40 inches.

[0246] Item 21. A stick weight assembly for use within a shaft of a golf club, the shaft including a shaft inner surface defining a shaft bore, the stick weight assembly including a stick weight and a stick weight support, the stick weight being a rod sized to be inserted into the shaft bore, the rod having a rod upper end and a rod lower end, the rod upper end defining an outer upper end shape and having a hole disposed proximate the upper portion of the rod, and including a rod and a disk sized to abut the tip end of the shaft and connected to the rod lower end, the stick weight support including a first end, a second end, and a first portion having an outer surface defining a dome, the dome being sized to be inserted into the shaft, and a second portion connected to the first portion and including an outer surface and a plurality of ridges sized to project outwardly from the outer surface and engage the shaft inner surface, and a retainer sized to be inserted into the hole, the stick weight support defining a cavity extending from the second end toward the first end, the cavity being configured to receive the rod upper end, the stick weight assembly.

[0247] Item 22. The stick weight assembly according to item 21, wherein the hole may extend through the upper portion of the rod.

[0248] Item 23. The stick weight assembly according to item 21, wherein the material of the cap - type SW support fills the entire hole to form the retainer.

[0249] Item 24. The stick weight assembly according to item 21, wherein the material of the cap - type SW support fills a part of the hole to form the retainer.

[0250] Item 25. The stick weight assembly according to item 21, wherein the retainer has a retainer diameter, and the retainer diameter is from 0.05 inches to 0.10 inches.

[0251] Item 26. A golf club comprising a club head, a shaft having a shaft bore, a grip, a hosel having a hosel bore, and a stick weight assembly having a stick weight and a stick weight support, wherein the stick weight is a rod sized to be inserted into the shaft bore, the rod having a rod upper end, a rod upper portion, and a rod lower portion, the rod upper end defining an outer upper end shape, a rod having a hole disposed proximate the rod upper portion, and a disk sized to be connected to the rod lower end and abut the tip of the shaft; the stick weight support comprising a first end, a second end, a first portion having an outer surface defining a dome, the dome being sized to be inserted into the shaft, a second portion connected to the first portion and having an outer surface and a plurality of ridges sized to project outward from the outer surface and engage the inner surface of the shaft, the plurality of ridges having a ridge shape selected from the group consisting of a triangle, a semi-circle, and an ellipse, the stick weight support defining a cavity extending from the second end toward the first end, the cavity being configured to receive the upper end of the rod.

[0252] Item 27. A stick weight assembly for use within a shaft of a golf club, the shaft including an inner shaft surface defining a shaft bore, the stick weight assembly including a stick weight and a stick weight support, the stick weight being a rod sized to be inserted into the shaft bore, the rod having an upper rod portion and a lower rod portion, the upper end of the rod defining an outer upper end shape, a channel being disposed adjacent to the upper rod portion, the rod, and a disk sized to abut the tip of the shaft and connected to the lower end of the rod, the stick weight support including a first end, a second end, and a first portion having an outer surface defining a dome, the dome being sized to be inserted into the shaft, the first portion, and a second portion connected to the first portion and including an outer surface and a plurality of ridges sized to project outwardly from the outer surface and engage the inner shaft surface, the stick weight support defining a cavity extending from the second end toward the first end, the cavity being configured to receive the upper end of the rod, the stick weight assembly.

[0253] Item 28. The stick weight assembly according to item 27, wherein the channel is recessed inside the upper rod portion.

[0254] Item 29. The stick weight assembly according to item 27, wherein the channel includes a first wall and a second wall, and the first wall and the second wall have the same height.

[0255] Item 30. The stick weight assembly according to item 27, wherein the channel includes an interlock, and the interlock is selected from the group consisting of one or more protrusions, teeth, recesses, and threads.

[0256] Item 31. The stick weight assembly according to item 30, wherein the interlock projects from the first wall.

[0257] Item 32. The stick weight assembly according to item 30, wherein the interlock projects from the second wall.

[0258] Item 33. A golf club comprising a club head, a shaft having a shaft bore, a grip, a hosel having a hosel bore, and a stick weight assembly having a stick weight and a stick weight support, the stick weight being a rod sized to be inserted into the shaft bore, the rod having a rod upper end, a rod upper portion, and a rod lower portion, the rod upper end defining an outer upper end shape, a rod having a channel disposed adjacent to the rod upper portion, and a disk sized to be connected to the rod lower end and abut against the tip of the shaft, the stick weight support being a first portion having a first end, a second end, and an outer surface defining a dome, the dome being sized to be inserted into the shaft, a second portion connected to the first portion, the second portion having an outer surface and a plurality of ridges sized to project outward from the outer surface and engage the inner surface of the shaft, the plurality of ridges having a ridge shape selected from the group consisting of a triangle, a semi-circle, and an ellipse, the stick weight support defining a cavity extending from the second end toward the first end, the cavity being configured to receive the upper end of the rod.

[0259]

[0260] Item 34. A stick weight assembly for use within a shaft of a golf club, the shaft including a shaft inner surface defining a shaft bore, the stick weight assembly including a stick weight and an integrated stick weight support, the stick weight being a rod sized to be inserted into the shaft bore, the rod having a rod upper portion and a rod lower portion, the rod upper end defining an outer upper end portion shape, the rod having one or more openings disposed thereon, a disk sized to be connected to the rod lower end and abut against the tip of the shaft, and an inner portion and an outer portion.

[0261] Item 36. The stick weight assembly according to item 35, wherein the first material is different from the second material.

[0262] Item 37. The stick weight assembly according to item 34, wherein the inner part has an inner part density and the outer part has an outer part density.

[0263] Item 38. The stick weight assembly according to item 37, wherein the outer part density is less than the inner part density.

[0264] Item 39. The stick weight assembly according to item 34, wherein the disk has two or more disk ribs.

[0265] Item 40. A stick weight assembly for use within a shaft of a golf club, the shaft including an inner shaft surface defining a shaft bore, the stick weight assembly including a stick weight, the stick weight being a rod sized to be inserted within the shaft bore, the rod having a rod upper end and a rod lower end, a disk sized to be connected to the rod lower end and abut against a tip end of the shaft, a first fin disposed in the vicinity of the rod upper end, and a second fin disposed in the vicinity of the rod lower end, the first fin having a first fin outer diameter, the second fin having a second fin outer diameter, the first fin outer diameter and the second fin outer diameter corresponding to an inner diameter of the shaft.

[0266] Item 41. The stick weight assembly according to item 40, wherein the first fin has a first fin upper surface and a first fin lower surface, and the second fin has a second fin upper surface and a second fin lower surface.

[0267] Item 42. The stick weight assembly according to item 41, wherein the first fin upper surface is tapered with respect to the first fin lower surface, and the second fin upper surface is tapered with respect to the second fin lower surface.

[0268] Item 43. The stick weight assembly according to item 41, wherein the upper surface of the first fin is parallel to the lower surface of the first fin, and the upper surface of the second fin is parallel to the lower surface of the second fin.

[0269] Item 44. The stick weight assembly according to item 40, wherein the first fin and the second fin comprise partial slits.

[0270] Item 45. The stick weight assembly according to item 40, wherein the first fin and the second fin are integrally formed with a rod.

[0271] The replacement of one or more of the claimed elements constitutes a reconfiguration and not a repair. Further, for certain embodiments, benefits, other advantages, and solutions to problems have been described. However, those benefits, advantages, solutions to problems, and elements or elements that may cause or make more prominent those benefits, advantages, or solutions are not to be construed as important, necessary, or essential features or elements of any or all of the claims unless such benefits, advantages, solutions, or elements are recited in such claims.

[0272] Furthermore, the embodiments and limitations disclosed herein are not provided to the public under the doctrine of equivalents where those embodiments and / or limitations (1) are not expressly recited in the claims and (2) are or may be equivalent to the expressly recited elements and / or limitations in the claims.

Claims

1. A stick weight assembly for use within a shaft of a golf club, wherein the shaft includes an inner shaft surface defining a shaft bore, the stick weight assembly comprising a stick weight and a stick weight support, wherein the stick weight is a rod sized to be inserted into the shaft bore, having a rod upper end and a rod lower end, the rod upper end defining an outer upper end shape, and a disk sized to be connected to the rod lower end and to abut the tip end of the shaft, wherein the stick weight support is a first end, a second end, a first portion having an outer surface defining a dome, the dome being sized to be inserted into the shaft, a second portion connected to the first portion, the second portion comprising an outer surface and a plurality of ridges sized to project outwardly from the outer surface and to engage the inner shaft surface, the stick weight support defining a cavity extending from the second end toward the first end, the cavity being configured to receive the rod upper end, the stick weight assembly.

2. wherein the upper end of the rod defines an outer upper end shape, the cavity defining a cavity shape complementary to the outer upper end shape, the stick weight assembly according to claim 1.

3. the stick weight assembly being configured to be disposed within a hollow graphite shaft, the stick weight assembly according to claim 1.

4. the stick weight assembly being disposed at the tip end of the shaft, the stick weight assembly according to claim 2.

5. wherein the stick weight support includes a material selected from the group consisting of thermoplastic styrene block copolymers (TPS or TPE-s), thermoplastic polyolefin elastomers (TPO or TPE-o), and thermoplastic vulcanizates (TPV or TPE-v), the stick weight assembly according to claim 1.

6. wherein the rod has a length of less than 2.70 inches, the stick weight assembly according to claim 1.

7. The stick weight assembly according to claim 1, wherein the rod has a rod diameter of 0.20 inches to 0.40 inches.

8. The stick weight assembly according to claim 1, wherein the stick weight comprises a material selected from the group consisting of aluminum, aluminum alloy, stainless steel, stainless steel alloy, tungsten, or tungsten alloy.

9. The stick weight assembly according to claim 1, wherein the disk has a thickness of 0.025 inches to 0.125 inches.

10. The stick weight assembly according to claim 1, wherein the disk has a disk diameter of 0.20 inches to 0.40 inches.

11. The stick weight assembly according to claim 2, wherein the stick weight assembly is permanently disposed, in part, within the tip end of the shaft.

12. A golf club comprising: a club head, a shaft having a shaft bore, a grip, a hosel having a hosel bore, and a stick weight assembly comprising a stick weight and a stick weight support; wherein the stick weight is a rod sized to be inserted into the shaft bore, the rod having a rod upper end and a rod lower end, the rod upper end defining an outer upper end shape; a disk connected to the rod lower end and sized to abut against the tip end of the shaft; wherein the stick weight support comprises a first end, a second end, a first portion having an outer surface defining a dome, the dome being sized to be inserted into the shaft; a second portion connected to the first portion, the second portion comprising an outer surface and a plurality of ridges sized to project outward from the outer surface and engage the inner surface of the shaft; wherein the plurality of ridges have a ridge shape selected from the group consisting of a triangle, a semi-circle, and an ellipse; wherein the stick weight support defines a cavity extending from the second end toward the first end; wherein the cavity is configured to receive the upper end of the rod.

13. wherein the upper end of the rod defines an outer upper end shape. The stick weight assembly according to claim 12, wherein the cavity defines a cavity shape complementary to the outer upper end shape.

14. The stick weight assembly according to claim 12, wherein the stick weight assembly is partially and permanently disposed within the tip of the shaft.

15. The stick weight assembly according to claim 12, wherein the stick weight support includes a material selected from the group consisting of thermoplastic styrene block copolymers (TPS or TPE-s), thermoplastic polyolefin elastomers (TPO or TPE-o), and thermoplastic vulcanizates (TPV or TPE-v).

16. The stick weight assembly according to claim 12, wherein the stick weight includes a material selected from the group consisting of aluminum, aluminum alloy, stainless steel, stainless steel alloy, tungsten, or tungsten alloy.

17. The stick weight assembly according to claim 12, wherein the rod has a length of less than 2.70 inches.

18. The stick weight assembly according to claim 12, wherein the rod has a rod diameter of 0.20 inches to 0.40 inches.

19. The stick weight assembly according to claim 12, wherein the disk has a thickness of 0.025 inches to 0.125 inches.

20. The stick weight assembly according to claim 12, wherein the disk has a disk diameter of 0.20 inches to 0.40 inches.

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