Golf club with additional bond area ferrule

Abstract

A ferrule for an iron-type golf club has multiple discrete interface areas for more securely connecting the club shaft with the hosel of the club head. The ferrule includes at least two discrete interface areas for connecting with the hosel and a third discrete interface area for connecting with the shaft. The upper half of the ferrule is tapered to provide a visually appealing transition between the shaft and the hosel.

Description

[Technical Field]

[0001] This application claims the benefit of U.S. Provisional Patent Application No. 63 / 376,251, filed September 19, 2022, the entire contents of which are incorporated herein by reference. [Background technology]

[0002] The present invention relates generally to golf equipment, and more particularly to ferrules used to couple iron-type golf club heads to shafts. Summary of the Invention [Problem to be solved by the invention]

[0003] A ferrule connects the hosel of an iron-type club head to the shaft, providing a seamless transition between them. The shaft and hosel typically have different outer diameters, and therefore, the outer surface of the ferrule can include a transition region that smoothly tapers from the shaft to the hosel to provide an aesthetically pleasing appearance. Furthermore, the surface of the ferrule contacts portions of both the hosel and the shaft, providing an area for securing the club head to the shaft. When a player executes a swing, the connection point between the iron-type club head and the shaft can be subjected to significant stress, and therefore, it is important that the ferrule securely couple the iron-type club head to the shaft. The overall length of the ferrule is generally short for aesthetic reasons, and therefore, the area available on the ferrule for coupling to the shaft and hosel is limited. The limited interface area can result in an unreliable connection and increase the likelihood of the club head becoming detached from the shaft. Therefore, there is a need in the art for a ferrule that more securely couples the club head to the shaft while maintaining an aesthetically pleasing appearance. [Brief explanation of the drawings]

[0004] [Figure 1] 1 is a close-up view of a conventional prior art ferrule. [Figure 2] FIG. 2 is a close-up view of a ferrule according to the present disclosure. [Figure 3] 3 illustrates a golf club having a club head connected to a shaft by the ferrule of FIG. 2. [Figure 4] FIG. 4 is an enlarged detail view of the golf club of FIG. 3. [Figure 5] FIG. 3 is a perspective view showing the ferrule of FIG. 2. [Figure 6] FIG. 4 is an enlarged perspective view of the golf club head of FIG. 3. [Figure 7A] 3 is an enlarged side view in cross section of a golf club head with a golf club connection assembly including the ferrule and tip weight of FIG. 2; [Figure 7B] FIG. 4 is an enlarged side view showing the golf club of FIG. 3 in cross section. [Figure 8] 4 is a further enlarged side view showing the golf club of FIG. 3 in cross section; [Figure 9] FIG. 6 is a side elevational view in cross section of the ferrule of FIG. 5; [Figure 10] 6 is another side elevational view of the ferrule of FIG. 5 in cross section. [Figure 11] FIG. 10 shows a horizontal microgroove pattern on the outer surface of the shaft. [Figure 12] FIG. 10 shows a longitudinal microgroove pattern on the outer surface of the shaft. [Figure 13A] FIG. 1 illustrates an embodiment of a multi-component ferrule. [Figure 13B] FIG. 10 illustrates another embodiment of a multi-component ferrule. DETAILED DESCRIPTION OF THE INVENTION

[0005] For simplicity and clarity of illustration, the drawing figures illustrate general structural aspects and may omit descriptions and details of well-known features and techniques to avoid unnecessarily obscuring the present invention. Further, elements in the drawing figures are not necessarily drawn to scale. For example, the dimensions of some elements in the figures may be exaggerated relative to other elements to help understand embodiments of the present invention. The same reference numerals in different figures refer to the same elements.

[0006] The terms "include," "have," and variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, system, article, device, or apparatus comprising a list of elements is not necessarily limited to those elements and may include other elements not expressly listed or inherent to such process, method, system, article, device, or apparatus.

[0007] The terms "first," "second," "third," "fourth," etc., used in this specification and claims, if any, are used to distinguish between similar elements and not necessarily to describe a particular sequence or chronological order. It is to be understood that terms so used are interchangeable under appropriate circumstances, such as when the embodiments described herein are capable of operating in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "include" and "have," and variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, device, or apparatus comprising a list of elements is not necessarily limited to those elements and may include other elements not expressly listed or inherent to such process, method, system, article, device, or apparatus.

[0008] Terms such as "left," "right," "front," "rear," "top," "bottom," "upper," "lower," and the like in this specification and claims are used, in some cases, for descriptive purposes and not necessarily to describe permanent relative positions. It is to be understood that the terms so used are interchangeable under appropriate circumstances, such that the embodiments of the invention described herein are operable, for example, in orientations other than those illustrated or otherwise described herein.

[0009] The terms "couple," "coupled," "couples," "coupling," and the like, should be understood broadly and refer to connecting two or more elements or signals in an electrical, mechanical, and / or other manner.

[0010] As used herein, the term "adhesive strength" can refer to the strength of an epoxy material at a head-shaft or grip-shaft connection. Adhesive strength can be quantified by the energy required to break the bond between the adhesive surface and the inner surface of the hosel, or between the adhesive surface and the outer surface of the hosel, or between the adhesive surface and the outer surface of the shaft.

[0011] As used herein, the term "epoxy" refers to any adhesive or resin mixture used to bond a shaft to a club head or grip. The epoxy may be applied to the shaft coupling and used as a means to secure the connection. The epoxy may form a bond between the shaft coupling and the inner surface of the hosel, or between the shaft coupling and the outer surface of the hosel, or between the shaft coupling and the outer surface of the shaft.

[0012] As used herein, the term "hosel connection juncture" can refer to the connection between the hosel and the ferrule, and can be used interchangeably with "connection juncture."

[0013] As used herein, the term "tip weight" may refer to a cylindrical weight component that may be inserted into the hosel and held in place with an epoxy material. The tip weight may be made of a high density material.

[0014] As used herein, a "longitudinal axis" may be an axis extending from the geometric center of the upper end of the shaft to the geometric center of the lower end of the shaft. The shaft may be a symmetrical cylinder bisected by the longitudinal axis.

[0015] As used herein, a "normal force" can be a pulling force applied normal or perpendicular to the cross-sectional area of ​​the shaft. In other words, a normal force can be applied parallel to the longitudinal axis of the shaft. A normal force may be used interchangeably with a "push force" or a "pull force." A normal force can be applied to a shaft and cause a uniform normal stress across the cross-sectional area of ​​the object.

[0016] As used herein, "torsional force" can be a twisting force applied parallel or tangential to the cross-sectional area of ​​the shaft. In other words, the torsional force can be applied perpendicular to the longitudinal axis of the shaft. Torsional force may be used interchangeably with torque or twisting force. Torsional forces can be applied to a shaft and cause a distribution of shear stress across the cross-sectional area of ​​the shaft.

[0017] The term "iron," as used herein, can refer, in some embodiments, to an iron-type golf club head having a loft angle that is less than about 62 degrees, less than about 61 degrees, less than about 60 degrees, less than about 59 degrees, less than about 58 degrees, less than about 57 degrees, less than about 56 degrees, less than about 55 degrees, less than about 54 degrees, less than about 53 degrees, or less than about 52 degrees. Furthermore, in many embodiments, the loft angle of the club head is greater than about 16 degrees, greater than about 17 degrees, greater than about 18 degrees, greater than about 19 degrees, greater than about 20 degrees, greater than about 21 degrees, greater than about 22 degrees, greater than about 23 degrees, greater than about 24 degrees, or greater than about 25 degrees.

[0018] The volume of the irons can be greater than or equal to 20 cubic centimeters (cc) and less than or equal to 80 cubic centimeters (cc). In some embodiments, the volume of the irons can range from 20 to 50 cc, or from 50 to 80 cc. In other embodiments, the volume of the irons can range from 20 to 60 cc, 30 to 70 cc, or 40 to 80 cc. For example, the volume of the irons can be 20, 30, 40, 50, 60, 70, or 80 cc.

[0019] In some embodiments, the irons can have a total mass ranging between 180 grams and 260 grams, between 190 grams and 240 grams, between 200 grams and 230 grams, between 210 grams and 220 grams, or between 215 grams and 220 grams. In some embodiments, the total mass of the club head is 215 grams, 216 grams, 217 grams, 218 grams, 219 grams, or 220 grams.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. In case of conflict, the present specification, including definitions, shall prevail. Preferred methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All publications, patent applications, patents, and other documents described herein are incorporated by reference in their entirety. The materials, methods, and examples disclosed herein are illustrative only and are not intended to be limiting.

[0021] Detailed Description of the Invention

[0022] Described herein are various embodiments of ferrules for iron-type golf clubs that can increase the bond strength between a hosel, an iron-type golf club head (hereinafter also referred to as a "golf club head"), and a shaft. More specifically, the ferrules described herein increase the bonding area for bonding the hosel and the shaft, providing a durable, longer-lasting golf club while maintaining a beautiful line of sight.

[0023] A durable connection for an iron-type golf club head is achieved by providing a combination of interacting surfaces between the hosel and ferrule. These surfaces of the hosel and ferrule are complementary, providing greater bonding surface interaction, as described below. The ferrule includes a collar that extends over and interacts with the surface of the hosel to provide a strong, durable connection.

[0024] An exemplary iron-type golf club 200 is shown in Figure 3. The golf club 200 includes a shaft 220 having a connecting end 221 and a grip end. A club head 240 is coupled to the connecting end 221 and includes a body 201, a sole 202, a top 203 opposite the sole 202, a toe 204, a heel 205 opposite the toe, and a hosel 210. The hosel 210 defines a hosel bore 216 and a hosel connection section 219, to which the shaft 220 is coupled by a ferrule 230.

[0025] The hosel may be positioned at the heel of the golf club head and located near the hosel connection junction. The hosel may include an inner hosel surface and an outer hosel surface. The hosel may further include a hosel connection section located on the outer hosel surface near the top of the hosel, which connection may provide a first hosel connection region between the hosel and the ferrule. A second hosel connection region may be provided between the inner hosel surface and the outer surface of the ferrule inner wall. Furthermore, a shaft connection region exists between the shaft and the ferrule. The outer shaft surface and the inner surface of the ferrule inner wall provide the shaft connection region. As described in more detail below, these surfaces are complementary and can be used to enhance the connection between the hosel and the ferrule. A seamless transition between the ferrule 230 and the hosel 210 improves the aesthetics of the club and reduces air resistance around the hosel connection junction 206 during use.

[0026] 5 and 7B, a ferrule 230 can be disposed in the hosel connection junction 206 to connect the hosel 210 and the shaft 220 together. The ferrule 230 can include a transition section 231 and an insert section 232. The insert section 232 can include an inner wall 234 and an outer wall 235, defining a receiving portion 233 therebetween. The ferrule has three junctions. Two of the junctions can be located on opposite sides of the ferrule's inner wall 234. The inner wall 234 can include an outer surface 236 that forms a first hosel junction region 246 and an inner surface 237 that forms a shaft junction region 247. The ferrule's outer wall 235 can provide a third junction region. The outer wall 235 can include an inner surface 239 that forms a second hosel junction region 248 and an outer surface 238. Hosel 210 can be connected to ferrule 230 at first hosel interface region 246 and second hosel interface region 248. Shaft 220 can be connected to ferrule 230 at shaft interface region 247. The use of these three interface regions reduces the likelihood of the shaft becoming dislodged from the hosel upon impact and prevents the ferrule from becoming misaligned, resulting in poor line of sight.

[0027] The outer wall 235 of the ferrule may extend straight down from the notch 250, with the outer wall 235 spaced sufficiently from the inner wall 234 so that the receiving portion 233 is large enough to receive the hosel connecting section 219. The notch 250 acts as a stress relief, allowing the insertion section 232 of the ferrule 230 to flex as it is inserted over the hosel connecting section 219. Reducing the flexing stress on the ferrule 230 may result in a more durable connection between the ferrule 230 and the hosel 210. Referring to FIG. 5 , the notch 250 may have a generally semicircular shape. The notch 250 may define a notch diameter 256 of between 0.40 inches and 0.60 inches. In certain embodiments, notch diameter 256 can be 0.40 inches to 0.42 inches, 0.42 inches to 0.44 inches, 0.44 inches to 0.46 inches, 0.46 inches to 0.48 inches, 0.48 inches to 0.50 inches, 0.50 inches to 0.52 inches, 0.52 inches to 0.54 inches, 0.54 inches to 0.56 inches, 0.56 inches to 0.58 inches, or 0.58 inches to 0.60 inches. In one exemplary embodiment, notch diameter 256 is 0.49 inches. In other embodiments, notch 250 can comprise a triangle, a rectangle, a polygon, or any other suitable shape.

[0028] The connection of the ferrule 230 to the hosel connection section 219 may provide extra surface area for joining the ferrule 230 to the hosel 210. The outer wall 235 may have an outer wall length 265. In some embodiments, the outer wall length 265 may be between 0.30 inches and 1.00 inches. In some embodiments, the outer wall length 265 may be between 0.30 inches and 0.40 inches, 0.40 inches and 0.50 inches, 0.50 inches and 0.60 inches, 0.60 inches and 0.70 inches, 0.70 inches and 0.80 inches, 0.80 inches and 0.90 inches, or 0.90 inches and 1.00 inches. In one exemplary embodiment, the outer wall length 265 is 0.46 inches. As the outer wall length increases, the surface area available for joining also increases.

[0029] The outer wall 235 can have an outer wall diameter 270. The outer wall diameter 270 can be larger than the first hosel connection section diameter 268 to allow the outer wall 235 to slide smoothly over the hosel connection section 219. In some embodiments, the outer wall diameter 270 can be between 0.40 inches and 0.60 inches. In some embodiments, the outer wall diameter 270 can be between 0.40 inches and 0.42 inches, 0.42 inches and 0.44 inches, 0.44 inches and 0.46 inches, 0.46 inches and 0.48 inches, 0.48 inches and 0.50 inches, 0.50 inches and 0.52 inches, 0.52 inches and 0.54 inches, 0.54 inches and 0.56 inches, 0.56 inches and 0.58 inches, or 0.58 inches and 0.60 inches. The outer wall diameter 270 is designed to complement the second hosel connection section diameter 269 to provide a seamless connection and an aesthetically pleasing golf club.

[0030] The transition section 231 extends away from the ferrule insertion section 232 and provides a seamless and aesthetically pleasing transition between the shaft 220, the ferrule 230, and the hosel 210. The transition section 231 may have a transition section length 261. In some embodiments, the transition section length 261 may be between 0.5 inches and 1.0 inches. In some embodiments, the transition section length 261 may be between 0.5 inches and 0.6 inches, 0.6 inches and 0.7 inches, 0.7 inches and 0.8 inches, 0.8 inches and 0.9 inches, or 0.9 inches and 1.0 inches. In one exemplary embodiment, the transition section length 261 is 0.7 inches.

[0031] 9 , the ferrule 230 can include a transition section outer diameter 241. In some embodiments, the transition section outer diameter 241 can be between 0.20 inches and 1.00 inches. In some embodiments, the transition section outer diameter 241 can be between 0.20 inches and 0.30 inches, 0.30 inches and 0.40 inches, 0.40 inches and 0.50 inches, 0.50 inches and 0.60 inches, 0.60 inches and 0.70 inches, 0.70 inches and 0.80 inches, 0.80 inches and 0.90 inches, or 0.90 inches and 1.00 inches. In one exemplary embodiment, the transition section outer diameter 241 is 0.53 inches. In another exemplary embodiment, the transition section outer diameter varies between 0.30 inches and 0.55 inches. The transition section 231 may have a varying tapered outer diameter 241 to allow for a smooth transition between the shaft, the ferrule 230, and the hosel, and for the ferrule 230 to overlap the hosel.

[0032] The transition section 231 can include a transition angle 242 extending through the transition section length 261. In some embodiments, the transition angle 242 can be between 4 degrees and 24 degrees. In some embodiments, the transition angle 242 can be between 4 degrees and 7 degrees, 7 degrees and 10 degrees, 10 degrees and 13 degrees, 13 degrees and 16 degrees, 16 degrees and 19 degrees, 19 degrees and 21 degrees, or 21 degrees and 24 degrees. In one exemplary embodiment, the transition angle 242 is 9 degrees. The transition angle 242 can be constant or can vary along the transition section 231. The transition angle 242 can provide a visually seamless transition between the shaft 220 and the hosel 210.

[0033] The ferrule bore 243 extends through the transition section 231 and into the insertion section 232 for receiving the connecting end 221 of the shaft 220. In some embodiments, the ferrule bore 243 stops short of the bottom of the insertion section 232, and instead of being a through-hole, a cap extends across the end of the inner wall 234. Additionally, the ferrule bore 243 can have a ferrule bore diameter. In some embodiments, the ferrule bore diameter 244 can be between 0.20 inches and 0.60 inches. In some embodiments, the ferrule bore diameter 244 can be between 0.20 inches and 0.30 inches, 0.30 inches and 0.40 inches, 0.40 inches and 0.50 inches, or 0.50 inches and 0.60 inches. In one exemplary embodiment, the ferrule bore diameter 244 is 0.30 inches.

[0034] Continuing with reference to FIG. 9 , the ferrule inner wall 234 has an outer diameter 240 sized for insertion into the hosel connection section 219. In some embodiments, the insert section outer diameter 240 can be between 0.20 inches and 0.60 inches. In some embodiments, the insert section outer diameter 240 can be between 0.20 inches and 0.30 inches, 0.30 inches and 0.40 inches, 0.40 inches and 0.50 inches, or 0.50 inches and 0.60 inches. In one exemplary embodiment, the insert section outer diameter 240 is 0.35 inches. In some embodiments, the insert section 232 comprises a constant insert section outer diameter 240. The constant insert section outer diameter 240 means that the insertion end 231 can easily fit into the hosel bore, allowing for a tight seal and increasing the likelihood that the insertion end 231 will be able to form a uniform distribution of epoxy across the outer surface of the inner wall.

[0035] The hosel bore 216 may extend along a hosel axis 215 and be configured to receive the ferrule 230 and shaft 220. The hosel bore 216 may be recessed into the hosel 210, beginning at a hosel connection section 219 and continuing downward toward a hosel base end 224. The diameter of the hosel bore 216 may be constant from the hosel connection section 219 to the hosel base end 224, or the diameter may vary. The hosel bore 216 may have an upper bore end 217 and a lower bore end 218. The upper bore end 217 may define an open end, and the lower bore end 218 may define a closed end. The hosel bore 216 may provide a means for mating the golf club head to the shaft 220 and ferrule 230. Additionally, the hosel bore 216 may define a critical interface where the epoxy, tip weight, and ferrule all interact.

[0036] The hosel bore 216 may further include a hosel bore length, defined herein as the distance from the upper end 217 to the lower end 218 of the bore. In some embodiments, the hosel bore length may be between 0.80 inches and 1.60 inches. In some embodiments, the hosel bore length may be between 0.80 inches and 0.90 inches, 0.90 inches and 1.00 inches, 1.00 inches and 1.10 inches, 1.10 inches and 1.20 inches, 1.20 inches and 1.30 inches, 1.30 inches and 1.40 inches, 1.40 inches and 1.50 inches, or 1.50 inches and 1.60 inches. In one exemplary embodiment, the hosel bore length is 1.07 inches. The length of the hosel bore 216 may determine how much of the ferrule inner wall outer surface 236 can function as a bonding area. A longer hosel bore allows for a larger interface area, but making the hosel bore too long creates more mass which can affect the club head's performance characteristics such as the club head's center of gravity and moment of inertia, so the hosel bore length should be balanced against the overall mass of the club head.

[0037] As shown in FIG. 6 , the hosel connection section 219 is configured to provide a smooth transition with the ferrule 230. The hosel connection end 219 can include an annular shoulder 227 connecting the first hosel connection outer surface and the second hosel connection outer surface 228. The annular shoulder 227 provides a better, smoother transition from the ferrule to the hosel. Additionally, the annular shoulder 227 serves as a guide during assembly of the golf club. The first hosel connection outer surface has a smaller diameter than the second hosel connection outer surface 228, providing an outer hosel interface surface for receiving a portion of the ferrule 230, as discussed in more detail below. The smaller diameter of the first hosel interface outer surface receives a portion of the ferrule 230 to avoid protruding the ferrule 230 at the top of the hosel 210 and to create a large, defined interface area for improved adhesion between the hosel 210 and the ferrule 230. The first hosel connection outer surface 184 can further include a hosel connection section length extending from the end of the hosel connection section 219 and an annular shoulder 227. In some embodiments, the hosel connection section length can be between 0.10 inches and 1.00 inches. In some embodiments, the hosel connection section length can be between 0.10 inches and 0.20 inches, 0.20 inches and 0.30 inches, 0.30 inches and 0.40 inches, 0.40 inches and 0.50 inches, 0.50 inches and 0.60 inches, 0.60 inches and 0.70 inches, 0.70 inches and 0.80 inches, 0.80 inches and 0.90 inches, or 0.90 inches and 1.00 inches. In one exemplary embodiment, the hosel connection section length is 0.41 inches. The hosel connection section length provides a set of surface interactions. The hosel connection section length interacts with both the receiver and the ferrule. A longer hosel connection section can provide a larger interface area, but a hosel connection end that is too long creates more mass that can affect club head performance characteristics such as the club head's center of gravity and moment of inertia, so the hosel connection section length should be balanced with the overall mass of the club head.

[0038] The hosel 210 may further comprise a first hosel thickness, which is the distance between the outer surface 214 and the inner surface 213 of the hosel. In some embodiments, the first hosel thickness may be between 0.01 inches and 0.20 inches. In some embodiments, the first hosel thickness may be between 0.01 inches and 0.04 inches, 0.04 inches and 0.07 inches, 0.07 inches and 0.10 inches, 0.10 inches and 0.13 inches, 0.13 inches and 0.16 inches, or 0.16 inches and 0.20 inches. In one exemplary embodiment, the first hosel thickness is 0.06 inches. The first hosel thickness may be constant.

[0039] Additionally, the hosel connection section outer surface can define a second hosel thickness that is less than the first hosel thickness. In some embodiments, the second hosel thickness can be between 0.01 inches and 0.20 inches. In some embodiments, the second hosel thickness can be between 0.01 inches and 0.04 inches, 0.04 inches and 0.07 inches, 0.07 inches and 0.10 inches, 0.10 inches and 0.13 inches, 0.13 inches and 0.16 inches, or 0.16 inches and 0.20 inches. In one exemplary embodiment, the second hosel thickness is 0.02 inches. The hosel connection section thickness is complementary to the thickness of the receiver to ensure a seamless transition between the ferrule and the hosel. The hosel connection section thickness must be thick enough to enable the hosel to withstand impact stresses, yet thin enough to allow the receiver to be positioned over the hosel connection section. As described above, the hosel connection section 219 is thinner than the rest of the hosel 210 due to material reduction to accommodate the receiver 233. The reduction in material in the hosel connection section 219 can increase discretionary mass.

[0040] This discretionary mass can be redistributed to another area of ​​the golf club body or used to construct the ferrule 230 from a stronger material. In some embodiments, the hosel connection section 219 can have a mass reduction of between 2.50 grams and 5.50 grams. In some embodiments, the mass reduction in the hosel connection section area is between 2.50 grams and 2.75 grams, 2.75 grams and 3.00 grams, 3.25 grams and 3.50 grams, 3.50 grams and 3.75 grams, 3.75 grams and 4.00 grams, 4.00 grams and 4.25 grams, 4.25 grams and 4.50 grams, 4.50 grams and 4.75 grams, 4.75 grams and 5.00 grams, 5.00 grams and 5.25 grams, 5.25 grams and 5.75 grams, or 3.75 grams and 4.00 grams. In one exemplary embodiment, the mass reduction in the hosel connection section can be 4.00 grams. Reducing mass could result in a more durable club through the use of different materials or could be moved back into the club head to change performance characteristics such as the center of gravity or moment of inertia.

[0041] The hosel 210, ferrule 230, and shaft 220 may have three separate interface surfaces to increase the interface area and strength between the hosel 210 and shaft 220. A first hosel interface area 246 is formed between the inner wall outer surface 236 and the hosel inner surface 213. A second hosel interface area 248 is formed between the outer wall inner surface 239 and the hosel connection section 219. A shaft interface area 247 is formed between the inner wall inner surface 237 and the shaft 220. The ferrule 230 having two interface areas to the hosel increases the interface strength, thereby providing a longer-lasting, more durable hosel / ferrule connection. Additionally, the longer inner wall 234 increases the interface area between the ferrule 230 and the shaft 220. Furthermore, the ferrule 230 engages both the shaft 220 and the hosel 210. Specifically, the inner and outer walls 234, 235 are complementary to the hosel connection section 219, thereby more positively positioning the ferrule 230 within the hosel 210. Additionally, the extended length of the ferrule inner wall 234 better aligns the ferrule 230 with the shaft 220. Furthermore, the addition of the extra interface area can provide a visually pleasing appearance of a seamless transition between the shaft, ferrule, and hosel. The interface area not only reduces the likelihood of offset between the shaft and ferrule, but also reduces the likelihood of the shaft and / or hosel becoming dislodged from the ferrule during a golf swing.

[0042] The shaft joining region 247 can define a shaft joining region length 277 from the top of the shaft joining region to the bottom of the shaft joining region. In some embodiments, the shaft joining region length 277 can be between 1.02 inches and 1.12 inches. In some embodiments, the shaft joining region length 277 can be between 1.02 inches and 1.03 inches, between 1.03 inches and 1.04 inches, between 1.04 inches and 1.05 inches, between 1.05 inches and 1.06 inches, between 1.06 inches and 1.07 inches, between 1.07 inches and 1.08 inches, between 1.08 inches and 1.09 inches, between 1.09 inches and 1.10 inches, between 1.10 inches and 1.11 inches, or between 1.11 inches and 1.12 inches. In one exemplary embodiment, the shaft joining region length 277 is 1.07 inches.

[0043] The first hosel interface region 246 may define a first hosel interface region length 276 from the top of the first hosel interface region to the bottom of the first hosel interface region. In some embodiments, the first hosel interface region length 276 can be between 0.45 inches and 1.25 inches. In some embodiments, the first hosel interface region length 276 can be between 0.45 inches and 0.55 inches, between 0.55 inches and 0.65 inches, between 0.65 inches and 0.75 inches, between 0.75 inches and 0.85 inches, between 0.85 inches and 0.95 inches, between 0.95 inches and 1.05 inches, between 1.05 inches and 1.15 inches, or between 1.15 inches and 1.25 inches. In one exemplary embodiment, the first hosel interface region length 276 is 0.75 inches. The increased surface area of ​​the epoxy provides a stronger bond between the golf club head 200 and the ferrule 230 and shaft 220 combination, reducing the likelihood of the club head coming loose with normal use.

[0044] The second hosel interface region 248 may define a second hosel interface region length 278 from the top of the second hosel interface region to the bottom of the second hosel interface region. In some embodiments, the second hosel interface region length 278 can be between 0.30 inches and 1.00 inches. In some embodiments, the second hosel interface region length 278 can be between 0.30 inches and 0.40 inches, 0.40 inches and 0.50 inches, 0.50 inches and 0.60 inches, 0.60 inches and 0.70 inches, 0.70 inches and 0.80 inches, 0.80 inches and 0.90 inches, or 0.90 inches and 1.00 inches. In one exemplary embodiment, the second hosel interface region length 278 is 0.47 inches. The second hosel interface region 248 is an additional bonding region not utilized in other ferrules. The increased surface area of ​​the epoxy provides a stronger bond between the golf club head 200 and the ferrule 230 and shaft 220 combination, reducing the likelihood of the club head coming loose with normal use.

[0045] The second hosel interface region length 278 can be approximately half of the first hosel interface region length 276. In one embodiment, the second hosel interface region length 278 can be the same as the first hosel interface region length 276. In other embodiments, the second hosel interface region length 278 can be longer than the first hosel interface region length 276. The second hosel interface region length 278 can be constant or varying around the circumference of the ferrule 230. The first hosel interface region length 276 can be constant or varying around the circumference of the ferrule 230. Varying the first and second hosel interface region lengths allows for different hosel designs and can focus the bonding effects of the epoxy.

[0046] The first hosel bond area length and the second hosel bond area length combine to form a total hosel bond area length. The total hosel bond area length can be greater than 0.5 inches. In some embodiments, the total hosel bond area length can be greater than 0.5 inches, greater than 0.6 inches, greater than 0.7 inches, greater than 0.8 inches, greater than 0.9 inches, greater than 1.0 inches, greater than 1.1 inches, or greater than 1.2 inches. In an exemplary embodiment, the total hosel bond area length can be greater than 1.1 inches.

[0047] Epoxy is used to bond the hosel to the ferrule and the shaft to the ferrule. Epoxy can be applied to the first hosel interface area 246, the shaft interface area 247, and the second hosel interface area 248 to secure the ferrule 230, hosel 210, and shaft 220 together. A small gap is formed between the ferrule 230 and hosel 210, and between the ferrule 230 and shaft 220. This gap allows sufficient space for the application of epoxy to each interface. The bore diameter of the ferrule and the bore diameter of the hosel are slightly larger than the diameter of the shaft and the diameter of the inner wall of the ferrule, respectively, to allow a small gap for the application of epoxy.

[0048] In some embodiments, the shaft interface region 247 can define a shaft interface gap 252 with a shaft interface gap width that can be between 0.0070 inches and 0.0100 inches. The shaft interface gap width is provided to ensure that epoxy can be applied between the outer surface of the shaft and the inner surface of the ferrule wall. In some embodiments, the shaft interface gap width can be between 0.0070 inches and 0.0075 inches, 0.0075 inches and 0.0080 inches, 0.0080 inches and 0.0085 inches, 0.0085 inches and 0.0090 inches, 0.0090 inches and 0.0095 inches, or 0.0095 inches and 0.0100 inches. In one exemplary embodiment, the shaft interface gap width is 0.0085 inches. The ability to apply epoxy between the outer surface of the shaft and the inner surface of the ferrule wall can provide a stronger bond through a larger interface area. A stronger bond can result in a more durable club.

[0049] In some embodiments, the first hosel interface region can define a first hosel interface gap 251 with a first hosel interface gap width that can be between 0.0070 inches and 0.0100 inches. The first hosel interface gap width is provided to ensure that epoxy can be applied between the inner hosel surface and the outer surface of the ferrule inner wall. In some embodiments, the first hosel interface gap width can be between 0.0070 inches and 0.0075 inches, 0.0075 inches and 0.0080 inches, 0.0080 inches and 0.0085 inches, 0.0085 inches and 0.0090 inches, 0.0090 inches and 0.0095 inches, or 0.0095 inches and 0.0100 inches. In one exemplary embodiment, the first hosel interface gap width is 0.0085 inches. The ability to interface the inner hosel surface with the outer surface of the ferrule inner wall can provide a stronger bond through a larger interface area. Having a stronger bond can provide a more durable connection between the ferrule 230, hosel 210, and club head 200.

[0050] In some embodiments, the second hosel interface region 248 can define a second hosel interface gap 253 with a second hosel interface gap width that can be between 0.0070 inches and 0.0100 inches. The second hosel interface gap width is provided to ensure that epoxy can be applied between the hosel connection section and the inner surface of the ferrule outer wall. In some embodiments, the second hosel interface gap width can be between 0.0070 inches and 0.0075 inches, between 0.0075 inches and 0.0080 inches, between 0.0080 inches and 0.0085 inches, between 0.0085 inches and 0.0090 inches, between 0.0090 inches and 0.0095 inches, or between 0.0095 inches and 0.0100 inches. In one exemplary embodiment, the second hosel interface gap width is 0.0085 inches. The second hosel interface gap 253 provides additional interface options for the ferrule, allowing for a stronger connection and reducing the likelihood of the ferrule and hosel separating from impact stresses.

[0051] The first hosel interface gap 251, the shaft interface gap 252, and the second hosel interface gap 253 can have the same width. In one embodiment, the first hosel interface gap 251 can have a width greater than the shaft interface gap 252 and the second hosel interface gap 253. In another embodiment, the shaft interface gap 252 can have a width greater than the first hosel interface gap 251 and the second hosel interface gap 253. In another embodiment, the first hosel interface gap 251 can have a constant or varying width around the circumference of the ferrule 230. The shaft interface gap 252 can have a constant or varying width around the circumference of the ferrule 230. The second hosel interface gap 253 can have a constant or varying width around the circumference of the ferrule 230.

[0052] 4, the ferrule 230 can mate with both the hosel 210 and the shaft 220 to provide a secure and strong bond. In some embodiments, the ferrule 230 can experience a bond strength increase of between 30% and 60%. In some embodiments, the bond strength increase of the ferrule 230 can be between 30% and 35%, 35% and 40%, 40% and 45%, 45% and 50%, 50% and 55%, or 55% and 60%. In one exemplary embodiment, the ferrule 230 can experience a 50% increase in strength of the hosel connection joint 206.

[0053] Additionally, the first hosel interface region can have a first surface area, the second hosel interface region can have a second surface area, and the shaft interface region can have a third surface area. All three surface areas can be combined to create a total surface area of ​​1.35 in 2 from 1.70in 2 In some embodiments, the total surface area can be between 1.35 in 2 from 1.40 in 2 , 1.40in 2 from 1.45in 2 , 1.45in 2 From 1.50 in 2 , 1.50in 2 from 1.55in 2 , 1.55in 2 From 1.60 in 2 , 1.60in 2 from 1.65in 2 , or 1.65in 2 from 1.70in 2 It can be between.

[0054] Additionally, the first hosel interface region and the second hosel interface region can have a yield force at which the hosel-to-ferrule bond breaks. This yield force is related to the strength of the epoxy bonding the ferrule to the hosel. This yield force can be between 3,500 and 5,500 pounds. In some embodiments, the yield force can be between 3,500 and 3,700 pounds, 3,700 and 3,900 pounds, 3,900 and 4,100 pounds, 4,100 and 4,300 pounds, 4,300 and 4,500 pounds, 4,500 and 4,700 pounds, 4,700 and 4,900 pounds, 4,900 and 5,100 pounds, 5,100 and 5,300 pounds, or 5,300 and 5,500 pounds.

[0055] The ferrule 230 can be made from a variety of materials. In one embodiment, the material is acrylonitrile butadiene styrene, a lightweight plastic. Lightweight materials allow weight to be relocated to other optimal locations to improve swing loading, moment of inertia, and center of gravity location. Another embodiment utilizes aluminum, a lightweight metal. By utilizing the hosel connection section 219, a small amount of saved mass can be redistributed to either the body 201 or the ferrule 230. If redistributed to the ferrule 230, another material, such as aluminum, can be used. Aluminum embodiments provide a stronger structure, thereby providing a stronger connection for the entire golf club. Additionally, the ferrule 230 may be fabricated using other metal or plastic materials. In other embodiments, the ferrule 230 may be constructed from multiple materials.

[0056] Other features

[0057] The above-described embodiments can be combined with other features to further increase the surface area available for bonding, bond strength, or to tailor the overall performance of the club head.

[0058] The ferrule 230 may further include one or more relief ports 254. The relief ports 254 provide a passageway for air and adhesive when the ferrule 230 is inserted into the hosel connection end 219. The relief ports 254 may extend from the receiver 233 to the outer wall outer surface and / or the transition section outer surface. The one or more relief ports 254 may comprise a generally circular shape. In other embodiments, the one or more relief ports 254 may comprise a triangular, rectangular, polygonal, or any other suitable shape.

[0059] The one or more relief ports 254 can have a relief port diameter. In some embodiments, the relief port diameter can be between 0.01 inches and 0.10 inches. In some embodiments, the relief port diameter can be between 0.01 inches and 0.02 inches, 0.02 inches and 0.03 inches, 0.03 inches and 0.04 inches, 0.04 inches and 0.05 inches, 0.05 inches and 0.06 inches, 0.06 inches and 0.07 inches, 0.07 inches and 0.08 inches, 0.08 inches and 0.09 inches, or 0.09 inches and 0.10 inches. In one exemplary embodiment, the relief port diameter is 0.05 inches. The relief port diameter is set completely within the hosel bore 216, allowing excess epoxy and air to escape. The one or more relief ports 254 act as a pressure relief to allow the ferrule 230 to fully seat in the hosel 210. A full connection between the ferrule and hosel results in a stronger bond.

[0060] In some embodiments, a tip weight 290 can be positioned within the hosel bore 216 between the ferrule 230 and the club head 210. The tip weight 290 can have a mass ranging between 0 grams and 18 grams. In some embodiments, the mass of the tip weight 290 can be 0 grams (in embodiments without a tip weight), 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, or 18 grams.

[0061] The tip weight 290 can comprise a material that is different from the material of the club head body 200, shaft 220, and ferrule 230. The tip weight 290 may comprise a high density material, such as tungsten or other suitable metal or metal alloy material. In some embodiments, the density of the material of the tip weight 290 can be between 1.1 g / cc and 19.6 g / cc. In some embodiments, the density of the material of the tip weight 290 is 1.1 g / cc, 1.5 g / cc, 2.0 g / cc, 2.5 g / cc, 3.0 g / cc, 3.5 g / cc, 4.0 g / cc, 4.5 g / cc, 5.0 g / cc, 5.5 g / cc, 6.0 g / cc, 6.5 g / cc, 7.0 g / cc, 7.5 g / cc, 8.0 g / cc, 8.5 g / cc, 9.0 g / cc, 9.5 g / cc, 10.0 g / cc, 10.5 g / cc, 11.0 g / cc, 11.5 g / cc, 12.0 g / cc, 12.5 g / cc, 13.0 g / cc, 13.5g / cc, 14.0g / cc, 14.5g / cc, 15.0g / cc, 15.5g / cc, 15.8g / cc, 16.0g / cc, 16.2g / cc, 16.4g / cc, 16.6g / cc, 16.8g / cc, 17.0g / cc, 17.2g / cc, 1 It can be 7.4g / cc, 17.6g / cc, 17.8g / cc, 18.0g / cc, 18.2g / cc, 18.4g / cc, 18.6g / cc, 18.8g / cc, 19.0g / cc, 19.2g / cc, 19.4g / cc, or 19.6g / cc.

[0062] In other embodiments including a shorter hosel 210, the tip weight 290 may not be inserted so that the shaft 220 is pressed further into the hosel 210, thereby maximizing the surface area available for bonding. Additionally, removing the tip weight 290 also redistributes mass to either the perimeter weight of the club head 200 or the ferrule 230. If mass is redistributed to the ferrule 230, this may result in a heavier, stronger material being used, further strengthening the bond at the hosel connection joint 206.

[0063] 11 and 12, the shaft 220 can include microgrooves 255. The microgrooves 255 can form passages or channels that promote uniform epoxy flow around the shaft 220. Having uniform epoxy flow can prevent pressure buildup and air pockets between the shaft 220 and the ferrule 230, resulting in a more durable hosel connection joint 206. Furthermore, the microgrooves 255 can improve joint strength while maintaining other golf club features, such as the ferrule 230, hosel size, and tip weight 290, as desired. Additionally, the microgrooves 255 can be located on the hosel 210.

[0064] The microgrooves 255 can be recessed into the shaft 220 to define multiple sidewalls. In some embodiments, the microgrooves can be discrete lines, discrete shapes, intersecting lines, or intersecting shapes. The microgrooves 255 can form passageways to more evenly distribute stress throughout the connection. The microgrooves 255 can extend circumferentially around the shaft 210 or can be formed in groups. The sidewalls of the microgrooves can be smooth or jagged. The sidewalls of the microgrooves 255 can be oriented in different directions to provide more surface area for increased bond strength.

[0065] The depth of the microgrooves 255 is between 0.0010 inches and 0.0050 inches. In some embodiments, the depth of the microgrooves 255 is less than about 0.0010 inches, 0.0015 inches, 0.0020 inches, 0.0025 inches, 0.0030 inches, 0.0035 inches, or 0.0040 inches. In some embodiments, the depth of the microgrooves is between 0.0010 inches and 0.0025 inches, 0.0010 inches and 0.0050 inches, 0.0015 inches and 0.0030 inches, 0.0025 inches and 0.0040 inches, or 0.0035 inches and 0.0050 inches. In one exemplary embodiment, the depth of the microgrooves 255 is 0.0030 inches. The microgrooves 255 can be applied to both graphite and steel shafts. In some graphite shafts, the microgrooves 255 are recessed into the outer resin layer of the shaft, but do not extend through the inner composite layer.

[0066] In some embodiments, the depth of the microgrooves 255 is constant throughout the microgrooves 255, while in other embodiments, the depth of the microgrooves 255 varies throughout the microgrooves 255. In some embodiments, the depth of the microgrooves 255 varies such that the microgrooves 255 are deeper near the bottom end of the shaft and the microgrooves 255 become shallower toward the top end of the shaft. Conversely, in other embodiments, the depth of the microgrooves 255 varies such that the microgrooves 255 are deeper near the top end of the shaft and the microgrooves 255 become shallower toward the bottom end of the shaft. The depth of the microgrooves 255 can vary in any pattern, and the depth of the microgrooves 255 can also vary randomly. Furthermore, the depth can vary in any direction within an individual microgroove 255.

[0067] Each microgroove 255 defines a shape that may be the same or different from the remaining microgrooves 255. The microgrooves 255 may be a circle, a line, a triangle, a square, a rectangle, a polygon, or any combination of suitable shapes. The microgrooves 255 may be intersecting, overlapping, or discontinuous. The microgrooves 255 may be formed in groups of at least two microgrooves 255. However, each group may be comprised of one, two, three, four, five, six, seven, eight, nine, ten, or more microgrooves 255. Furthermore, the microgrooves 255 may be formed in groups of one, two, three, four, five, six, seven, eight, nine, ten, or more microgrooves 255. The microgrooves 255 may include other features, such as ridges, notches, roughened zones, or any other feature that may enhance the bond strength of the shaft 220.

[0068] In additional embodiments, the ferrule can be constructed from individual components that are assembled to provide a completed ferrule similar to that described above. The transition section, insert section, and / or outer wall of the ferrule can be constructed from one or more pieces. With reference to FIGS. 13A and 13B, the ferrule can be constructed from two separate pieces. In the exemplary embodiment shown in FIG. 13A, a seam 258 separates a first component comprised of the outer wall from a second component comprised of the transition section and insert section. In another exemplary embodiment shown in FIG. 13B, a seam 258 separates a first component comprised of the transition section and outer wall from a second component comprised of the insert section. In another exemplary embodiment (not shown), a seam separates a first component comprised of the outer wall and insert section from a second component comprised of the transition section. In a further embodiment, a seam separates a first component comprised of half the outer wall, half the transition section, and half the insert section from a second component comprised of half the outer wall, half the transition section, and half the insert section. Manufacturing a ferrule using one or more pieces allows for tighter tolerances to ensure a snug fit between the hosel, shaft, and ferrule. Additionally, creating a ferrule from one or more pieces allows for simpler sections to be machined before assembly, easing the manufacturing process. The one or more components can be joined together through either brazing, welding, soldering, or adhesive bonding. Joining the one or more pieces together forms the final structure.

[0069] While the invention has been described in connection with various embodiments, it will be understood that the invention is capable of further modifications. This application is generally intended to cover any variations, uses, or adaptations of the invention in accordance with the principles of the invention, including such departures from the present disclosure as are within known practice in the art to which this invention pertains.

[0070] The replacement of one or more claimed elements constitutes a reconstruction, not a repair. Furthermore, advantages, other benefits, and solutions to problems have been described with respect to particular embodiments. However, the advantages, benefits, solutions to problems, and any elements that may give rise to or make more pronounced any advantage, benefit, or solution are not to be construed as critical, essential, or required features or elements of any or all of the claims unless such advantage, benefit, solution, or element is expressly recited in such claim.

[0071] Because the Rules of golf may change (e.g., new Rules may be adopted, or old Rules may be repealed or amended, by golf standards organizations and / or governing bodies such as the United States Golf Association (USGA), The Royal and Ancient Golf Club of St. Andrews (R&A), etc.), golf equipment related to the devices, methods, and articles of manufacture described herein may be deemed to conform or non-conform to the Rules of Golf at any particular time. Accordingly, golf equipment related to the devices, methods, and articles of manufacture described herein may be advertised, offered for sale, and / or sold as conforming or non-conforming golf equipment. The devices, methods, and articles of manufacture described herein are not limited in this respect.

[0072] Although the above examples may be described in connection with iron-type golf clubs, the apparatus, methods, and articles of manufacture described herein may be applied to other types of golf clubs, such as driver-wood-type golf clubs, fairway-wood-type golf clubs, hybrid-type golf clubs, iron-type golf clubs, wedge-type golf clubs, or putter-type golf clubs. Alternatively, the apparatus, methods, and articles of manufacture described herein may be applied to other types of sports equipment, such as hockey sticks, tennis rackets, fishing rods, ski poles, etc.

[0073] Furthermore, the embodiments and limitations disclosed herein are not dedicated to the public under the doctrine of equivalents if the embodiment and / or limitation (1) is not expressly claimed in the claims, and (2) is an equivalent or potentially equivalent element and / or limitation in the claims under the doctrine of equivalents.

[0074] example

[0075] Example 1: Finite element analysis

[0076] A finite element analysis (FEA) program was run to compare the force required to separate a golf club head from a shaft / ferrule assembly. The FEA examined two different models: a control sample similar to golf club head 100, which is an industry-standard hosel 110, ferrule 130, and shaft 120 connection assembly; and another test sample using a hosel 210, ferrule 230, and shaft 220 connection assembly similar to golf club head 200. The FEA model examined the situation when the control and test samples were connected without the use of epoxy. The connection was held together by frictional forces, and how increasing the surface area improved the connection strength.

[0077] [Table 1]

[0078] Table 1 above reveals improved strength for the test sample compared to the control sample. FEA results showed that the test sample required 84.0 lbf of force to disconnect the ferrule 130 and shaft 120 from the hosel 110, compared to 70.1 lbf for the control sample. This represents a 19.8% increase in connection strength when using friction alone. Adding epoxy to the hosel connection joint further increased this connection strength. FEA testing showed that the test sample had improved connection strength between the hosel 210, ferrule 230, and shaft 220 compared to the control sample.

[0079] Example 2: Tensile test analysis

[0080] In another example, a tensile test is performed to determine the strength of the hosel connection joint. In this example, the hosel 210, ferrule 230, and shaft 220 joints corresponding to the test sample of Example 1 and the control sample of Example 1 are physically constructed using epoxy as the adhesive. Both samples are placed in a tensile tester and the force required to break the joint and separate the hosel 210 from the shaft 220 and ferrule 230 is compared. This test requires a tensile strength of 3,300 lbs / in 2 Uses epoxy with a bond strength of 3,300 lbs / in 2 Assuming a tensile force of 1.0 in, the control sample was expected to produce 3,500 to 3,800 lbs of force, while the test sample was expected to produce 4,500 to 5,100 lbs of force. Therefore, the test sample was expected to have a 25% to 40% increase in bond strength. This increase was attributed to the increased surface area provided by the test sample and the increased surface area for the epoxy to interact and bond. The control sample had a connection surface area of ​​1.10 in 2 From 1.20in 2 and the connection surface area of ​​the test sample is 1.45 in 2 from 1.58in 2 The increase in connection surface area is due to three bonded areas for the test sample compared to two bonded areas for the control sample.

[0081] The two samples were placed in a tensile tester and pulled until the bond broke. The results showed a 20% to 40% increase in strength for the test sample over the control, depending on the epoxy used to bond them. The added strength translates to a better bond for the golf club, further reducing the risk of the golf club head coming loose during use.

[0082] Various features and advantages of the disclosure are set forth in the following clauses and claims.

[0083] Terms

[0084] Clause 1: A golf club, the club head comprising: a shaft having a shaft connection end and defining a shaft outer surface; a body; a sole; a top opposite the sole; a toe; a heel opposite the toe; and a hosel, the hosel comprising: a hosel inner surface defining a hosel bore; a hosel outer surface; and a hosel connection section; and a ferrule for connecting the hosel connection section to the shaft connection end, the ferrule comprising: a transition section having a transition outer surface; and an insert section coupled to the transition section, the insert section connecting the hosel bore to the shaft connection end. and an outer wall surrounding at least a portion of the inner wall and spaced from at least a portion of the inner wall, the inner wall having an inner wall outer surface defining a first hosel joining area facing the hosel inner surface and an inner wall inner surface sized to receive the shaft connection end, the inner wall inner surface defining the shaft joining area facing the shaft outer surface, the outer wall having an outer wall inner surface defining a second hosel joining area facing the hosel outer surface, the outer wall inner surface and the inner wall outer surface defining a receiving portion sized to receive the hosel connection section.

[0085] Clause 2: The golf club of clause 1, wherein the outer wall has an outer wall length and the inner wall has an inner wall length that is longer than the outer wall length.

[0086] Clause 3: The golf club of clause 1, wherein the inner wall has a distal end sized to be inserted into the hosel bore, and a cap extends across the distal end of the inner wall.

[0087] Clause 4: The golf club of clause 1, wherein the transition outer surface comprises a cone shape.

[0088] Clause 5: The golf club of clause 4, wherein the hosel connection section includes an annular shoulder connecting the first hosel connection section outer surface and the second hosel connection section outer surface, and the outer wall extends over the second hosel connection section outer surface.

[0089] Clause 6: The golf club of clause 1, further comprising a relief port extending through the ferrule from the receiving portion to the outer wall outer surface or the transition outer surface.

[0090] Clause 7: The golf club of clause 1, wherein the ferrule comprises an acrylonitrile butadiene styrene or aluminum ferrule material.

[0091] Clause 8: A ferrule for connecting a shaft having a shaft connecting end and defining a shaft outer surface to a golf club head having a hosel having a hosel inner surface, a hosel outer surface, and a hosel connection section defining a hosel bore, the ferrule comprising: a transition section having a ferrule transition outer surface; and an insert section coupled to the transition section, the insert section having an inner wall sized to be inserted into the hosel bore of the golf club head; and a recess spaced from at least a portion of the inner wall. and an outer wall surrounding a portion of the hosel connection section of the golf club head, the inner wall having an inner wall outer surface defining a first hosel joining area facing the hosel inner surface and an inner wall inner surface sized to receive the shaft connection end, the inner wall inner surface defining the shaft joining area facing the shaft outer surface, the outer wall having an outer wall inner surface defining a second hosel joining area facing the hosel outer surface, the outer wall inner surface and the inner wall outer surface defining a receiving portion sized to receive the hosel connection section of the golf club head.

[0092] Clause 9: A golf club connecting assembly for connecting a shaft having a shaft connecting end and defining a shaft outer surface to a golf club head having a hosel having a hosel inner surface defining a hosel bore, a hosel bore lower end, a hosel outer surface, and a hosel connecting end, the assembly comprising: a ferrule; and a tip weight, the ferrule comprising: a transition section having a ferrule transition outer surface; and an insert section coupled to the transition section, the insert section comprising: an inner wall sized to be inserted into the hosel bore of the golf club head; and an outer wall spaced from at least a portion of the inner wall and surrounding at least a portion of the inner wall. the inner wall has an inner wall outer surface defining a first hosel joining area facing the hosel inner surface, and an inner wall inner surface sized to receive the shaft connection end, the inner wall inner surface defining the shaft joining area facing the shaft outer surface; the outer wall has an outer wall inner surface defining a second hosel joining area facing the hosel outer surface, the outer wall inner surface and the inner wall outer surface defining a receiving portion sized to receive the hosel connection section of the golf club head; and the tip weight is disposed in a hosel bore of the golf club head, and is disposed between a lower end of the hosel bore and the ferrule.

[0093] Clause 10: The golf club of clause 1, further comprising a tip weight disposed within the hosel bore and between the ferrule and the club head.

[0094] Clause 11: The golf club of clause 1, wherein the ferrule includes a notch formed between the transition section and the insert section.

[0095] Clause 12: The golf club of clause 1, wherein the outer wall defines an outer wall length of at least 0.40 inches (1.016 centimeters).

[0096] Clause 13: The ferrule of clause 8, wherein the outer wall has an outer wall length and the inner wall has an inner wall length that is longer than the outer wall length.

[0097] Clause 14: The ferrule of clause 8, wherein the inner wall has a distal end sized to be inserted into the hosel bore, and wherein a cap extends across the distal end of the inner wall.

[0098] Clause 15: The ferrule of clause 8, further comprising a relief port extending through the ferrule from the receiving portion to the outer wall outer surface or the transition outer surface.

[0099] Clause 16: The ferrule of clause 8, wherein the ferrule comprises an acrylonitrile butadiene styrene or aluminum ferrule material.

[0100] Clause 17: The ferrule of clause 8, further comprising a notch formed between the transition section and the insertion section.

[0101] Clause 18: The ferrule of clause 8, wherein the outer wall defines an outer wall length of at least 0.40 inches (1.016 centimeters).

[0102] Clause 19: The golf club connection assembly of clause 9, further comprising an escape port extending through the ferrule from the receiver to the outer wall outer surface or the transition outer surface.

[0103] Clause 20: The golf club connection assembly of clause 9, wherein the ferrule includes a notch formed between the transition section and the insertion section.

Claims

1. A golf club, a shaft having a shaft connecting end and defining a shaft outer surface; a club head comprising a body, a sole, a top opposite the sole, a toe, a heel opposite the toe, and a hosel, the hosel comprising an inner hosel surface defining a hosel bore, an outer hosel surface, and a hosel connection section; a ferrule for connecting the hosel connection section to the shaft connection end, The ferrule is a transition section having a transition outer surface; an insert section coupled to the transition section; The insert section comprises: an inner wall sized for insertion into the hosel bore; an outer wall spaced from and surrounding at least a portion of the inner wall; The inner wall is an inner wall outer surface defining a first hosel joining region facing the hosel inner surface; an inner wall surface sized to receive the shaft connecting end, the inner wall surface defining a shaft interface area facing the shaft outer surface; and the outer wall has an inner surface defining a second hosel bonding region facing the hosel outer surface; the outer wall inner surface and the inner wall outer surface define a receiving portion sized to receive the hosel connection section. Golf club.

2. the outer wall has an outer wall length; The inner wall has an inner wall length that is longer than the outer wall length. The golf club of claim 1 .

3. the inner wall having a distal end sized to be inserted into the hosel bore; a cap extending across the distal end of the inner wall; The golf club of claim 1 .

4. the transition outer surface comprises a cone shape; The golf club of claim 1 .

5. the hosel connection section includes an annular shoulder connecting an outer surface of the first hosel connection section to an outer surface of the second hosel connection section; the outer wall extends over an outer surface of the second hosel connection section; The golf club according to claim 4.

6. a relief port extending through the ferrule from the receiving portion to the outer wall outer surface or the transition outer surface; The golf club of claim 1 .

7. the ferrule comprises an acrylonitrile butadiene styrene or aluminum ferrule material; The golf club of claim 1 .

8. a tip weight disposed within the hosel bore and between the ferrule and the club head; The golf club of claim 1 .

9. the ferrule including a notch formed between the transition section and the insertion section. The golf club of claim 1 .

10. the outer wall defines an outer wall length of at least 0.40 inches (1.016 centimeters); The golf club of claim 1 .

11. 1. A ferrule for connecting a shaft having a shaft connecting end and defining a shaft outer surface to a golf club head having a hosel having an inner hosel surface defining a hosel bore, an outer hosel surface, and a hosel connecting section, comprising: a transition section having a ferrule transition outer surface; an insert section coupled to the transition section; The insert section comprises: an inner wall sized for insertion into a hosel bore of a golf club head; an outer wall spaced from and surrounding at least a portion of the inner wall; The inner wall is an inner wall outer surface defining a first hosel joining region facing the hosel inner surface; an inner wall surface sized to receive the shaft connecting end, the inner wall surface defining a shaft interface area facing the shaft outer surface; and the outer wall has an inner surface defining a second hosel bonding region facing the hosel outer surface; the outer wall inner surface and the inner wall outer surface define a receiving portion sized to receive a hosel connection section of the golf club head; Ferrule.

12. the outer wall has an outer wall length; The inner wall has an inner wall length that is longer than the outer wall length.

12. The ferrule of claim 11.

13. the inner wall having a distal end sized to be inserted into the hosel bore; a cap extending across the distal end of the inner wall; 12. The ferrule of claim 11.

14. a relief port extending through the ferrule from the receiving portion to the outer wall outer surface or the transition outer surface; 12. The ferrule of claim 11.

15. the ferrule comprises an acrylonitrile butadiene styrene or aluminum ferrule material; 12. The ferrule of claim 11.

16. further comprising a notch formed between the transition section and the insert section.

12. The ferrule of claim 11.

17. the outer wall defines an outer wall length of at least 0.40 inches (1.016 centimeters); 12. The ferrule of claim 11.

18. 1. A golf club connecting assembly for connecting a shaft having a shaft connecting end and defining a shaft outer surface to a golf club head having a hosel having a hosel inner surface defining a hosel bore, a hosel bore lower end, a hosel outer surface, and a hosel connecting end, A ferrule and A tip weight is provided, The ferrule is a transition section having a ferrule transition outer surface; an insert section coupled to the transition section; The insert section comprises: an inner wall sized for insertion into a hosel bore of the golf club head; an outer wall spaced from and surrounding at least a portion of the inner wall; The inner wall is an inner wall outer surface defining a first hosel joining region facing the hosel inner surface; an inner wall surface sized to receive the shaft connecting end, the inner wall surface defining a shaft interface area facing the shaft outer surface; and the outer wall has an inner surface defining a second hosel bonding region facing the hosel outer surface; the outer wall inner surface and the inner wall outer surface define a receiving portion sized to receive a hosel connection section of the golf club head; the tip weight is disposed in a hosel bore of the golf club head and is disposed between a lower end of the hosel bore and the ferrule; Golf club connection assembly.

19. a relief port extending through the ferrule from the receiving portion to the outer wall outer surface or the transition outer surface; 20. The golf club connecting assembly of claim 18.

20. the ferrule including a notch formed between the transition section and the insertion section.

20. The golf club connecting assembly of claim 18.

Images