Golf club heads with golf coupling mechanisms

Abstract

To satisfy a need for a golf coupling mechanism that adjusts a club head loft angle, a club head lie angle, and a golf club shaft length to reduce a club head or shaft inventory size.SOLUTION: A golf coupling mechanism allows for adjustment of a club head loft angle, a club head lie angle, and a golf club shaft length while utilizing one club head and one shaft 136. In a fully extended configuration, the golf coupling mechanism includes a shaft sleeve 156, a removable spacer 216, and a removable extender 228. A fastening assembly secures the golf coupling mechanism to the golf club head. In a contracted configuration, the golf coupling mechanism includes the shaft sleeve. The golf coupling mechanism further includes a shaft cap 192 to soften an interaction between the shaft and the golf coupling mechanism.SELECTED DRAWING: Figure 12

Description

[Technical field]

[0001] (CROSS REFERENCE TO RELATED APPLICATIONS) This claims the benefit of U.S. Provisional Patent Application No. 62 / 881,271, filed July 31, 2019, and is a continuation-in-part of U.S. Patent Application No. 16 / 523,839, filed July 26, 2019. U.S. Patent Application No. 16 / 523,839 is a continuation-in-part of U.S. Patent Application No. 15 / 831,515, filed December 5, 2017, and issued September 3, 2019 as U.S. Patent No. 10,398,946. U.S. Patent Application No. 15 / 831,515 is a continuation-in-part of U.S. Patent Application No. 15 / 003,494, filed January 21, 2016, and issued January 16, 2018 as U.S. Patent No. 9,868,035. U.S. Patent Application No. 15 / 003,494 claims the benefit of U.S. Provisional Patent Application No. 62 / 107,240, filed January 23, 2015, and U.S. Provisional Patent Application No. 62 / 254,081, filed November 11, 2015, and is a continuation-in-part of U.S. Patent Application No. 14 / 282,786, filed May 20, 2014, and issued as U.S. Patent No. 9,327,170 on May 3, 2016. U.S. patent application Ser. No. 14 / 282,786, filed May 20, 2014, is a continuation of U.S. patent application Ser. No. 13 / 795,653, filed March 12, 2013, issued October 27, 2015 as U.S. Patent No. 9,168,426, (ii) U.S. patent application Ser. No. 13 / 429,319, filed March 24, 2012, issued July 29, 2014 as U.S. Patent No. 8,790,191, (iii) U.S. patent application Ser. No. 13 / 429,319, filed May 10, 2012, issued July 29, 2014 as U.S. Patent No. 8,790,191, (iv) U.S. patent application Ser. No. 13 / 429,319, filed May 10, 2012, issued July 29, 2014 as U.S. Patent No. 8,790,191, (v) U.S. patent application Ser. No. 13 / 468,663, which issued on January 6, 2015 as U.S. Patent No. 8,926,447; (iv) U.S. Patent Application No. 13 / 468,675, which was filed on May 10, 2012 and issued on January 13, 2015 as U.S. Patent No. 8,932,147; and (v) U.S. Patent Application No. 13 / 735,123, which was filed on January 7, 2013 and issued on November 24, 2015 as U.S. Patent No. 9,192,823. U.S. Patent Application No. 13 / 429,319 claims the benefit of U.S. Provisional Patent Application No. 61 / 590,232, filed on January 24, 2012, and U.S. Provisional Patent Application No. 61 / 529,880, filed on August 31, 2011.Each of U.S. patent application Ser. No. 13 / 468,663 and U.S. patent application Ser. No. 13 / 468,675 is a continuation-in-part of U.S. patent application Ser. No. 13 / 429,319, which was filed on March 24, 2012 and issued as U.S. Patent No. 8,790,191 on July 29, 2014. U.S. Patent Application No. 13 / 735,123, filed January 7, 2013, is a continuation-in-part of (i) U.S. Patent Application No. 13 / 468,663, filed May 10, 2012, issued January 6, 2015 as U.S. Patent No. 8,926,447, (ii) U.S. Patent Application No. 13 / 468,675, filed May 10, 2012, issued January 13, 2015 as U.S. Patent No. 8,932,147, and (iii) U.S. Patent Application No. 13 / 464,677, filed May 10, 2012, issued April 16, 2013 as U.S. Patent No. 8,419,567, which are continuations-in-part of U.S. Patent Application No. 13 / 429,319, filed March 24, 2012. The contents of all the above disclosures are incorporated herein by reference in their entirety.

[0002] The present disclosure relates generally to golf clubs. More particularly, the present disclosure relates to a golf linkage for connecting a golf club head and shaft. [Background technology]

[0003] Current fitting methods require a large inventory of shafts to fit various users. Golf club fitters evaluate the swing of a user and then select a golf club with specifications that will best fit the user. Golf club fitters need to have an inventory of many shafts and club heads so that they can accommodate the fitting dimensions of different users. This large inventory is undesirable in the art because excess shafts or club heads take up storage space that could be used for other fitting supplies. Therefore, there is a need in the art for a golf connection mechanism that adjusts the club head loft angle, the club head lie angle, and the golf club shaft length to reduce the size of the club head or shaft inventory. [Brief description of the drawings]

[0004] [Figure 1] 1 shows a front view of a golf club head having a golf linkage. [Diagram 2] 2 shows an exploded view of the golf linkage of FIG. 1 for connecting a golf club head to a shaft. [Diagram 3] 2 illustrates a cross-sectional view of the shaft sleeve of the golf linkage of FIG. 1 taken along the hosel bore axis. [Figure 4] 2 shows a side perspective view of a shaft sleeve of the golf club linkage of FIG. 1. [Diagram 5] 2 shows a top perspective view of a hosel of the golf club head without the golf linkage of FIG. 1; [Figure 6] 2 shows a side perspective view of a shaft cap of the golf club linkage of FIG. 1. [Figure 7] 2 shows a top perspective view of a shaft cap of the golf club linkage of FIG. 1. [Figure 8] 2 illustrates a cross-sectional view of the golf linkage of FIG. 1 taken along the hosel bore axis. [Figure 9] 2 shows a side perspective view of an indicator system for the golf linkage of FIG. 1; [Figure 10] 2 shows a front view of the golf club head of FIG. 1 having a golf linkage with a shaft extension. [Figure 11] 2 shows a rear view of the golf linkage of FIG. 1 with a golf linkage having a shaft extension piece. [Figure 12] 1 illustrates an exploded view of a golf linkage with a shaft extension. [Figure 13] 1 illustrates a top perspective view of a removable spacer of a golf linkage. [Figure 14] 1 illustrates a side perspective view of a removable extender of a golf linkage according to a first embodiment. [Figure 15] 1 illustrates a cross-sectional view of a golf linkage having a shaft extension taken along the hosel bore axis. [Figure 16]1 illustrates a top perspective view of a removable extender of a golf linkage according to a second embodiment.

[0005] For simplicity and clarity of illustration, the drawings show general types of structures, and descriptions and details of well-known features and techniques may be omitted to avoid unnecessarily obscuring the present disclosure. Furthermore, elements in the drawings are not necessarily drawn to scale. For example, the dimensions of some of the elements in the drawings may be exaggerated relative to other elements to help improve understanding of the embodiments of the present disclosure. The same reference numerals in different drawings represent the same elements. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0006] The present embodiments discussed below are directed to a golf connection mechanism configured to connect a golf club head to a golf club shaft. The golf connection mechanism is disposed within a hosel having a hosel hole. The golf connection mechanism allows adjustment of a club head loft angle, a club head lie angle, and a golf club shaft length while utilizing one shaft. The golf connection mechanism utilizes an off-axis tilt in combination with a bow coupler set protruding from an outer surface of the golf connection mechanism to adjust the loft angle and lie angle of the golf club. The bow coupler set of the golf connection mechanism is configured to engage with an intended bow receiving coupler set within the hosel of the golf club head. The bow coupler set of the golf connection mechanism frictionally locks the shaft to the golf club head. The bow coupler ensures that the golf connection mechanism is centered within the hosel and ensures uniform contact between the golf connection mechanism and the hosel (i.e., the connection mechanism does not shift position within the hosel to create areas of high stress).

[0007] The golf linkage utilizes a removable spacer and a removable extender to extend the length of the shaft. The golf linkage with the shaft extension part including the removable spacer and the removable extender accommodates a wide range of golfer heights and / or wrist-floor dimensions. The removable spacer and the removable extender increase the length of the golf linkage, thereby increasing the length of the shaft. The removable spacer and the extender are fixed so as not to be threadably engageable with the golf linkage. The removable extension part of the golf linkage allows a golf fitter to use one shaft to accommodate golf player dimensions without the need to inventory many club heads or shafts.

[0008] The terms "comprising" and "having," as well as any variations thereof, are intended to include a non-exclusive inclusion, such that a process, method, system, article, device, or apparatus that includes a list of elements is not necessarily limited to those elements, but may include other elements that are not expressly listed or that are inherent to such process, method, system, article, device, or apparatus.

[0009] Terms such as "first," "second," "third," "fourth," etc., when present in the specification and claims, are used to distinguish between similar elements and are not necessarily intended to describe a particular sequential or chronological order. Terms so used should be understood to be interchangeable under appropriate circumstances, such that the embodiments described herein can operate in other orders than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to include non-exclusive inclusions, such that a process, method, system, article, device, or apparatus that includes 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.

[0010] Terms such as "left," "right," "front," "rear," "top," "bottom," "above," "below," and the like, when present in the specification and claims, are used for descriptive purposes and not necessarily to describe permanent relative positions. Terms so used should be understood to be interchangeable under appropriate circumstances, such that the embodiments of the apparatus, methods, and / or articles of manufacture described herein are operable, for example, in orientations other than those illustrated or otherwise described herein.

[0011] The terms "coupled," "coupled," "connect," "connecting," and the like should be understood broadly and mean to connect two or more elements mechanically or otherwise. A connection (whether mechanical or otherwise) can be of any length of time, for example, permanent or semi-permanent, or only for a moment.

[0012] The absence of words such as "removably" or "detachable" around a word such as "connected" does not mean that the connection in question is or is not removable.

[0013] The terms "loft," "loft angle," "lie," or "lie angle" of a golf club as used herein refer to the angle formed between the golf club and the ground when the golf club is held in an address position. At the address position, the lie angle of the golf club (i.e., the angle formed between the shaft and the ground) and the loft angle of the golf club (i.e., the angle formed between the club face and the ground) are oriented as specified by the manufacturer and are measured by any suitable loft and lie machine.

[0014] Embodiments of golf club heads are described herein, and may include hollow body club heads. More specifically, the club heads may be iron, wedge, crossover, or other iron-type club heads.

[0015] For example, irons may have a clubface angle of less than about 60 degrees, less than about 59 degrees, less than about 58 degrees, less than about 57 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, less than about 52 degrees, less than about 51 degrees, less than about 50 degrees, less than about 49 degrees, less than about 48 degrees, less than about 47 degrees, less than about 46 degrees, less than about 45 degrees, less than about 44 degrees, less than about 43 degrees, less than about 42 degrees, less than about 41 degrees, less than about 40 degrees, less than about The loft angle may be less than 39 degrees, less than about 38 degrees, less than about 37 degrees, less than about 36 degrees, less than about 35 degrees, less than about 34 degrees, less than about 33 degrees, less than about 32 degrees, less than about 31 degrees, less than about 30 degrees, less than about 29 degrees, less than about 28 degrees, less than about 27 degrees, less than about 26 degrees, less than about 25 degrees, less than about 24 degrees, less than about 23 degrees, less than about 22 degrees, less than about 21 degrees, less than about 20 degrees, less than about 19 degrees, or less than about 18 degrees.

[0016] Further, in some embodiments, the loft angle of the irons is 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, greater than about 25 degrees, greater than about 26 degrees, greater than about 27 degrees, greater than about 28 degrees, greater than about 29 degrees, greater than about 30 degrees, greater than about 31 degrees, greater than about 32 degrees, greater than about 33 degrees, greater than about 34 degrees, greater than about 35 degrees, greater than about 36 degrees, greater than about 37 degrees, greater than about It can be greater than 38 degrees, greater than about 39 degrees, greater than about 40 degrees, greater than about 41 degrees, greater than about 42 degrees, greater than about 43 degrees, greater than about 44 degrees, greater than about 45 degrees, greater than about 46 degrees, greater than about 47 degrees, greater than about 48 degrees, greater than about 49 degrees, greater than about 50 degrees, greater than about 51 degrees, greater than about 52 degrees, greater than about 53 degrees, greater than about 54 degrees, greater than about 55 degrees, greater than about 56 degrees, greater than about 57 degrees, greater than about 58 degrees, greater than about 59 degrees, or greater than about 60 degrees.

[0017] The irons may have lie angles ranging from 50 degrees to 65 degrees. In some embodiments, the lie angles of the irons may range from 50 to 60 degrees or 60 to 65 degrees. For example, the lie angles of the irons may be 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, or 65 degrees.

[0018] The volume of the irons may 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 may range from 20-50 cc or 50-80 cc. In other embodiments, the volume of the irons may range from 20-60 cc, 30-70 cc, or 40-80 cc. For example, the volume of the irons may be 20, 30, 40, 50, 60, 70, or 80 cc.

[0019] Other features and aspects will become apparent by considering the following detailed description and the accompanying drawings. Before describing any embodiment of the present disclosure in detail, it should be understood that the present disclosure is not limited in its application to the details or embodiments and arrangements of parts set forth in the following description or illustrated in the drawings. The present disclosure is capable of supporting other embodiments and can be practiced or carried out in various ways. It should be understood that the description of specific embodiments is not intended to limit the present disclosure, since it covers all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure. It should also be understood that the phraseology and terminology used herein are for the purpose of description and should not be regarded as limiting.

[0020] (Golf club head having golf coupling mechanism) The present technology generally relates to an iron-type club head having a golf connection mechanism for connecting a shaft to a club head. The golf connection mechanism reduces the size of the club head inventory and / or shaft inventory by having the ability to achieve multiple loft angles, lie angles, and shaft lengths with one club head and one shaft. The golf connection mechanism includes a shaft sleeve, a shaft cap, and a retention assembly to secure the golf connection mechanism within the hosel of the club head. The shaft sleeve includes features such as a connector set with off-axis tilt and multiple connectors to allow the golf connection mechanism to adjust the loft and lie angle together. The connector set of the shaft sleeve frictionally locks the shaft to the club head while providing uniform contact between the golf connection mechanism and the hosel. The shaft cap is formed of a soft material to allow the shaft cap to be elastically compressed within the shaft sleeve. The shaft cap acts like a "shaft pillow" to soften the interaction between the shaft and the golf connection mechanism. The shaft cap further includes a centering feature, such as a rib, to center the shaft within the golf linkage.

[0021] The golf connection mechanism further comprises shaft extension parts, such as a removable spacer and a removable extender, to extend the shaft length. The removable spacer and the removable extender are fixed to the golf connection mechanism without using threads or screw connections. The non-threaded connection of the removable spacer and the removable extender allows for quick removal of these parts to increase or decrease the shaft length. The golf connection mechanism described herein allows for multiple lie angle selections, loft angle selections, and shaft length selections while utilizing a single club head and a single shaft. A first embodiment of the present technology is described below.

[0022] Referring to the drawings, in which like reference numerals are used to identify like or identical parts in the various views, Figures 1-15 generally illustrate a first embodiment of the present design. Specifically, Figure 1 illustrates a front view of a golf club head 100 having a golf linkage 104. The club head 100 includes a striking face 108, a rear 112 opposite the striking face 108, a top rail 116, a sole 120 opposite the top rail 116, a toe 124, a heel 128 opposite the toe 124, and a hosel 132. The heel 128 of the club head 100 may be defined as the portion of the club head 100 that is proximate to and includes the hosel 132. The toe 124 of the club head 100 may be defined as the portion of the club head 100 that is furthest from the shaft.

[0023] 1 and 2, the club head 100 includes a striking face 108 intended to impact a golf ball and a hosel 132 intended to connect the club head 100 to a shaft 136. The hosel 132 includes a bore 140 configured to receive the golf linkage 104 and the shaft 136. The hosel bore 140 further includes a hosel flange 144 configured to receive a retention assembly including a washer 148 and a fastener 152. When tightened, the retention assembly including the washer 148 and the fastener 152 abuts the hosel flange 144 to secure and retain the golf linkage 104 within the hosel bore 140.

[0024] 3 and 4, the golf linkage includes a shaft sleeve 156 configured to be secured to an end of the shaft 136. The shaft sleeve 156 may be cylindrical or tubular in shape. The shaft sleeve 156 includes an upper section having an upper end 160 and a lower section having a lower end 164, the lower end 164 being closest to the sole 120 of the club head 100. The shaft sleeve 156 includes a widest portion at the upper end 160, and an outer diameter of the shaft sleeve 156 is greater than an inner diameter of the hosel bore 140. The shaft sleeve 156 further defines an upper end bore 168 and a lower end bore 172, the upper end bore 168 including an inner diameter greater than an inner diameter of the lower end bore 172. The upper end bore 168 of the shaft sleeve 156 is configured to receive the shaft 136. The lower end bore 172 of the shaft sleeve 156 may be configured to threadably engage the fastener 152.

[0025] The bore 168 at the top end of the shaft sleeve 156 includes a sleeve axis 176 that extends along the centerline of the shaft sleeve 156 in a direction from the sleeve top end 160 to the sleeve bottom end 164. The hosel bore 140 includes a hosel bore axis 180 that extends along the centerline of the hosel bore 140. The sleeve axis 176 may be angled or canted relative to the hosel bore axis 180. The sleeve axis 176 may be angled between 0.4 degrees and 2.5 degrees relative to the hosel bore axis 180. In some embodiments, the sleeve axis 176 may be angled between 0.4 degrees and 1.5 degrees or between 1.5 degrees and 2.5 degrees relative to the hosel bore axis 180. For example, the sleeve axis 176 may be angled 0.4, 0.5, 0.6, 0.8, 0.9, 1.0, 1.1, 1.2, 1.22, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, or 2.5 degrees relative to the hosel bore axis 180. The bore 168 at the top end of the shaft sleeve 156 does not have to be concentric with the hosel bore 140.

[0026] The sleeve axis 176, angled from the hosel bore axis 180, allows the shaft sleeve 156 to change the loft and lie angles of the club head 100 as it rotates within the hosel 132. A club head 100 using a golf linkage has two degrees of freedom: the shaft sleeve 156 can tilt forward and backward (i.e., from the striking face 108 to the rear 112, or vice versa) to change the loft angle, and the shaft sleeve 156 can tilt left and right (i.e., from heel to toe, or vice versa) to change the lie angle. Rotating the shaft sleeve 156 within the hosel 132 can adjust the loft angle and lie angle together.

[0027] The shaft sleeve 156 may include a coupler set 184 having a plurality of sleeve couplers protruding from an outer surface of the shaft sleeve 156. The coupler set 184 of the shaft sleeve 156 may protrude from the outer surface near the upper end 160 of the shaft sleeve 156. As shown in FIG. 4, the coupler set 184 of the shaft sleeve 156 forms an alternating concave and convex surface around the cylindrical outer surface of the shaft sleeve 156.

[0028] The sleeve couplers of the sleeve coupler set 184 may include arcuate surfaces configured to limit rotation of the shaft sleeve 156 and shaft 136 relative to the club head 100. The sleeve couplers of the sleeve coupler set 184 may complement the receiving couplers of the receiving coupler set 188 as described below. As shown in FIG. 4 , each sleeve coupler of the sleeve coupler set 184 may include a curved arcuate surface throughout the coupler. Each sleeve coupler of the sleeve coupler set 184 may include a horizontal radius of curvature extending generally in a heel-to-toe direction and a vertical radius of curvature extending in a direction from the sleeve upper end 160 to the sleeve lower end 164.

[0029] The sleeve coupler set 184 of the shaft sleeve 156 may include at least four sleeve couplers. The sleeve coupler set 184 of the shaft sleeve 156 may include a first sleeve coupler, a second sleeve coupler, a third sleeve coupler, and a fourth sleeve coupler. The sleeve coupler set 184 of the shaft sleeve 156 may further include a fifth sleeve coupler, a sixth sleeve coupler, a seventh sleeve coupler, and an eighth sleeve coupler.

[0030] 5, the hosel bore 140 may include a receiving coupler set 188 having a plurality of receiving couplers recessed into an inner surface of the hosel 132. The receiving couplers of the receiving coupler set 188 may complement the sleeve couplers of the sleeve coupler set 184 described above. The receiving couplers of the receiving coupler set 188 may include an arcuate surface that complements the arcuate surface of the sleeve coupler set 184 of the shaft sleeve 156. Each receiving coupler of the receiving coupler set 188 may include an arcuate surface that is curved throughout the receiving coupler. Each receiving coupler of the receiving coupler set 188 may include similar horizontal and vertical radii of curvature as each coupler of the coupler set 184.

[0031] The receiving coupler set 188 of the hosel bore 140 may include at least four receiving couplers. The receiving coupler set 188 of the hosel bore 140 may include a first receiving coupler, a second receiving coupler, a third receiving coupler, and a fourth receiving coupler. The receiving coupler set 188 of the hosel bore 140 may further include a fifth receiving coupler, a sixth receiving coupler, a seventh receiving coupler, and an eighth receiving coupler.

[0032] In some embodiments, the sleeve couplers of sleeve coupler set 184 may be asymmetric about the outer surface of shaft sleeve 156 such that one or more sleeve couplers have a longer length in a first area of ​​shaft sleeve 156 (i.e., the coupler length measured in a direction from sleeve upper end 160 to sleeve lower end 164) than in a second area of ​​shaft sleeve 156 (e.g., 90 degrees or 180 degrees away from the first area). The receiving couplers of receiving coupler set 188 may compensate for the asymmetrical contours of the sleeve couplers of sleeve coupler set 184.

[0033] The arcuate surfaces of the sleeve coupler set 184 and the receiving coupler set 188 may be configured to be continuously curved, without any curved points or edges. The edgeless design of the sleeve couplers of the coupler set 184 and the receiving coupler set 188 maximizes the contact area between the couplers when the sleeve coupler set 184 is positioned in the receiving coupler set 188. Maximizing the contact area between the coupler sets allows forces to be evenly distributed across the couplers during a golf swing. Even force distribution across the couplers minimizes high localized stress concentrations and increases the durability of the golf linkage 104. The sleeve coupler contact between the coupler set 184 and the receiving coupler set 188 frictionally locks and limits the rotation of the shaft sleeve 156 relative to the club head 100, thereby limiting rotation between the shaft 136 and the club head 100.

[0034] 6 and 7, the golf linkage 104 includes a shaft sleeve cap 192 configured to couple with the upper end 160 of the shaft sleeve 156. The shaft sleeve cap 192 may be configured to be resiliently compressed to be secured within the shaft sleeve 156. The shaft sleeve cap 192 is configured to act like a "shaft pillow" to soften the interaction between the golf linkage 104 and the shaft 136.

[0035] 6 and 7, the shaft sleeve cap 192 may include a centering feature, such as a rib or protrusion 196, to promote concentricity of the shaft 136 within the shaft sleeve 156. For example, the shaft sleeve cap 192 may include a rib or protrusion 196 on an inner surface of the shaft sleeve cap 192. In another example, the shaft sleeve cap 192 may include an outer protrusion 196 extending outwardly from an outer surface of the shaft sleeve cap 192. The shaft sleeve 156 may include a complementary receiving groove (not shown) that may be configured to receive the protrusion 196 when the shaft sleeve cap 192 is secured to the shaft sleeve 156.

[0036] 8, assembly of the golf linkage 104 may be completed prior to installation of the shaft 136 within the hosel 132. The shaft cap 192 is inserted into the bore 168 in the upper end of the shaft sleeve 156. The assembly including the shaft cap 192 and the shaft sleeve 156 is placed within the hosel bore 140 and twisted into the desired position such that the sleeve coupler set 184 of the shaft sleeve 156 rests or abuts the receiving coupler set 188 of the hosel 132. The assembly including the shaft cap 192 and the shaft sleeve 156 is secured within the hosel 132 by a retention assembly including a washer 148 and a fastener 152. The fastener 152 is threadably engaged with the bore 172 in the lower end of the shaft sleeve 156. A tool such as a torque limiting tool may be used to tighten the retention assembly. A retention assembly, including a washer 148 and a fastener 152, abuts the hosel flange 144 when the fastener 152 is tightened. Tightening of the fastener 152 pulls the golf linkage 104 downward toward the sole 120 of the club head 100 to retain a shaft sleeve 156 within the hosel 132.

[0037] The golf fitter begins adjusting the loft and lie angles of the club head 100 by loosening the fasteners 152 using a torque limiting tool. It is not necessary to completely remove the fasteners 152 from the hosel bore 140. Once the fasteners 152 are sufficiently loosened, the golf linkage 104 may be slightly lifted from its position within the hosel 132 and rotated. The golf fitter may rotate the golf linkage 104 to the desired lie angle setting indicator (as described in more detail below). Once the desired lie angle setting is selected, the golf linkage 104 may then be reinstalled within the hosel bore 140 and the fasteners 152 may be tightened to secure the golf linkage 104 within the hosel 132. It is not necessary to remove the shaft 136 from the golf linkage 104 to adjust the loft and lie settings.

[0038] The golf linkage mechanism 104 can adjust the loft angle from 0.2 degrees to 2.0 degrees and the lie angle from 0.5 degrees to 1.5 degrees. For example, the golf linkage mechanism 104 can adjust the loft angle to 0.2, 0.25, 0.3, 0.33, 0.4, 0.5, 0.6, 0.7, 0.8, 0.85, 0.88, 0.89, 0.9, 1.0, 1.1, 1.2, 1.22, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, or 2.0 degrees. The golf linkage 104 may adjust the lie angle to 0.5, 0.6, 0.7, 0.8, 0.81, 0.85, 0.89, 0.9, 1.0, 1.1, 1.2, 1.22, 1.3, 1.4, or 1.5 degrees.

[0039] The golf linkage 104 may include five settings, three weak loft angle settings (i.e., larger loft angles) and two strong loft angle settings (i.e., smaller loft angles). In one example, the sleeve axis 176 may be angled 1.22 degrees away from the hosel bore axis 180. The neutral position of the golf linkage 104 may occur when the sleeve axis 176 is aligned with the loft plane (i.e., the plane tangent to the striking face 108). The neutral position may be a first weak loft angle setting, where the golf linkage 104 does not change the factory-manufactured loft and lie angle of the club head 100. Adjustments to different weak loft angle settings start from the neutral setting. The second weak loft angle setting occurs when the golf linkage 104 is rotated 45 degrees in a first direction to achieve a loft angle decrease of 0.33 degrees and a lie angle increase of 0.89 degrees. A third weak loft angle setting occurs when the golf linkage 104 rotates 45 degrees in a second direction opposite the first direction to achieve a loft angle reduction of 0.33 and a lie angle reduction of 0.89. In this example, the weak loft angle setting may adjust the loft angle and lie angle by less than 1 degree.

[0040] Adjustments to different strong loft angle settings start from a neutral setting. The first strong loft angle setting occurs when the golf linkage 104 rotates 90 degrees in a first direction to achieve a 1.22 degree loft angle decrease and a 1.22 degree lie angle increase. The second strong loft angle setting occurs when the golf linkage 104 rotates 90 degrees in a second direction to achieve a 1.22 degree loft angle decrease and a 1.22 degree lie angle decrease. In this example, the strong loft angle setting may adjust the loft angle and lie angle by more than 1 degree.

[0041] 9, the golf connection mechanism 104 may further include an indicator system 200 for indicating the lie angle of the club head 100. The indicator system 200 may include a plurality of sleeve indicators 204 disposed on an outer surface of the shaft sleeve 156, a plurality of hosel indicators 208 disposed on an outer surface of the hosel 132, and a view window 212. The view window 212 may be formed by removing material from the hosel 132 during a casting manufacturing process. The view window 212 may include a square or rectangular shape. The top and bottom ends of the view window 212 may be rounded or include a radius of curvature. The indicator system 200 enables a golf fitter to identify the lie angle setting for the club head 100.

[0042] Continuing with reference to FIG. 9, the multiple indicators 208 disposed on the hosel 132 may be disposed in a vertical orientation. In one embodiment, three hosel indicators 208 may be disposed in a vertical orientation. With reference to the three weak loft angle settings described above, a first weak loft or neutral setting occurs when the sleeve indicator 204 aligns with the center or middle hosel indicator 208. A second weak loft angle setting occurs when the sleeve indicator 204 aligns with the top hosel indicator 208. Alignment with the top hosel indicator 208 may indicate an upright configuration for the club head 100 (i.e., the second weak loft angle setting increases the lie angle). A third weak loft angle setting occurs when the sleeve indicator 204 aligns with the bottom hosel indicator 208. Alignment with the bottom hosel indicator 208 may indicate a flat configuration for the club head 100 (ie, the third, weak loft angle setting reduces the lie angle).

[0043] With reference to the two strong loft angle settings discussed above, a first strong loft angle setting occurs when the sleeve indicator 204 is aligned with the top hosel indicator 208. The first strong loft angle setting allows for a strong loft angle configuration with an upright lie angle configuration. A second strong loft angle setting occurs when the sleeve indicator 204 is aligned with the bottom hosel indicator 208. The second strong loft angle setting allows for a strong angle configuration with a flat lie angle configuration.

[0044] (Golf joint mechanism with length adjustment) The golf linkage 104 allows adjustment of club head loft angle, club head lie angle, and golf club shaft length while utilizing one shaft. To achieve the loft and lie angle adjustment, the golf linkage 104 includes the shaft sleeve 156 with off-axis tilt in the upper end hole 168 and the asymmetric sleeve coupler set 184, as described above. The off-axis tilt and asymmetric sleeve coupler set 184 allow the shaft sleeve 156 to have two degrees of freedom when rotating in the hosel 132. To achieve the adjustment of the length of the shaft 136, the golf linkage 104 further includes shaft extension components such as a removable spacer and a removable extender. The removable spacer and the removable extender allow the shaft sleeve 156 to have a third degree of freedom (i.e., extension and contraction in the hosel hole 140). The removable spacer and the removable extender control the extension of the shaft 136. A golf linkage 104 with shaft extensions allows for an increase or decrease in shaft length while utilizing one shaft.

[0045] As described in more detail below, the removable spacer and the removable extender increase the length of the golf linkage 104, thereby increasing the length of the shaft 136. The removable spacer may include one or more coupler sets having multiple couplers similar to the sleeve coupler set 184 of the shaft sleeve 156 and the receiving coupler set 188 of the hosel 132. The one or more coupler sets of the removable spacer ensure that the golf linkage 104 frictionally locks the shaft 136 to the club head 100 in the extended configuration. The removable extender includes one or more engagement members that couple with the shaft sleeve 156. The one or more engagement members of the removable extender may non-threadably secure the removable extender to the shaft sleeve 156. The non-threaded connection between the removable extender and the shaft sleeve 156 facilitates removal of the shaft extension from the golf linkage 104 to adjust the loft angle, lie angle, and shaft length.

[0046] 10-12, the golf connection mechanism 104 may further include a removable spacer 216. The removable spacer 216 may be configured to connect with the shaft sleeve 156 near the upper end 160. The removable spacer 216 may be configured to abut against the hosel 132 and be disposed outside or external to the hosel 132 when the golf connection mechanism 104 is secured within the hosel 132. The removable spacer 216 may include an outer diameter that is larger than an inner diameter of the hosel bore 140.

[0047] 13, the removable spacer 216 may include a coupler set 220 having a plurality of couplers protruding from an outer surface of the spacer 216. The shape, quantity, and profile of the coupler set 220 of the removable spacer 216 may be similar to the sleeve coupler set 184 of the shaft sleeve 156. The coupler set 220 of the removable spacer 216 may be configured to seat and complement the receiving coupler set 188 of the hosel 132.

[0048] 13 , the removable spacer 216 may include a receiving coupler set 224 having a plurality of couplers recessed into an inner surface of the removable spacer 216. The shape, quantity, and profile of the receiving coupler set 224 of the removable spacer 216 may be similar to the receiving coupler set 188 of the hosel 132. The receiving coupler set 224 of the removable spacer 216 may be configured to seat in and complement the sleeve coupler set 184 of the shaft sleeve 156.

[0049] 12-15, the golf linkage 104 may further include a removable extender 228. The removable extender 228 may be configured to engage the lower end 164 of the shaft sleeve 156. The removable extender 228 may be disposed entirely within the hosel bore 140. When viewing the club head 100 from an exterior point away from the club head 100, the removable extender 228 is not visible. The removable extender 228 includes an outer diameter that is smaller than an inner diameter of the hosel bore 140.

[0050] 12, 14, and 15, the removable extender 228 may include one or more engagement members 232. In one example, the removable extender 228 may include a first engagement member 232 and a second engagement member 232. The first and second engagement members 232 may be features such as protrusions, projections, hooks, pegs, or features that can couple with the shaft sleeve 156. The first and second engagement members 232 of the removable extender 228 may be configured to couple with a locking channel 236 formed on the shaft sleeve 156. As shown in FIG. 4, 12, and 15, the shaft sleeve 156 includes a first locking channel 236 and a second locking channel 236 disposed near the lower end 164 of the shaft sleeve 156. The first and second engagement members 232 of the removable extender 228 slidably engage with the locking channel 236 of the shaft sleeve 156 to secure the removable extender 228 to the shaft sleeve 156. The interlocking connection between the removable extender 228 and the shaft sleeve 156 can be non-threaded or free of a connection requiring threads.

[0051] In another embodiment, as shown in FIG. 16 , the golf linkage 104 may include a removable extender 240 having a threaded post 244. The removable extender 240 may be configured to engage with the lower end 164 of the shaft sleeve 156. The removable extender 240 may be disposed entirely within the hosel bore 140. The removable extender 240 may include an outer diameter that is smaller than the inner diameter of the hosel bore 140. In this embodiment, the threaded post 244 of the removable extender 240 may be threadably engaged with the bore 172 at the lower end of the shaft sleeve 156. In this embodiment, the threaded connection between the removable extender 240 and the shaft sleeve 156 uses threads.

[0052] 15, assembly of the golf linkage 104, including the removable spacer 216 and shaft extension components such as the removable extender 228, may be completed prior to installation of the shaft 136 within the hosel 132. The shaft cap 192 is inserted into the bore 168 at the top end of the shaft sleeve 156. The removable spacer 216 is coupled near the top end 160 of the shaft sleeve 156, with the sleeve coupler set 184 of the shaft sleeve 156 resting or abutting the receiving coupler set 224 of the removable spacer 216. The removable extender 228 is engaged with the bottom end 164 of the shaft sleeve 156, with the first and second engagement members 232 coupling with the locking channel 236 of the shaft sleeve 156. The assembly including the shaft cap 192, shaft sleeve 156, removable spacer 216, and removable extender 228 is placed within the hosel bore 140 and rotated to a desired position such that the spacer coupler set 220 of the removable spacer 216 sits or abuts the receiving coupler set 188 of the hosel 132. The golf linkage 104 is then secured within the hosel 132 by a retention assembly including a washer 148 and a fastener 152. The fastener 152 is threadably engaged with the threaded bore 248 of the removable extender 228. Tightening of the fastener 152 pulls the golf linkage 104 downward toward the sole 120 of the club head 100 such that the golf linkage 104 can be retained within the hosel 132.

[0053] The golf fitter begins to adjust the length of the shaft 136 by removing the fasteners 152 using a torque limiting tool. Once the fasteners 152 are removed from the hosel bore 140, the golf linkage 104 may be removed from the hosel 132. The golf fitter may couple the removable spacer 216 and the removable extender 228 to the shaft sleeve 156. Once the removable spacer 216 and the removable extender 228 are secured to the shaft sleeve 156, the assembled golf linkage 104 is reinstalled within the hosel bore 140 and secured with the fasteners 152.

[0054] The golf linkage 104 may include a set of spacers 216 and extenders 228 to accommodate a wide range of golfer extensions and wrist-to-floor lengths. The golf linkage 104, including the removable spacers 216 and removable extenders 228, may extend the length of the shaft 136 by 0.25 inches to 2.0 inches. In some embodiments, the golf linkage 104 may increase the length of the shaft 136 by 0.25 to 1.0 inches, or by 1.0 to 2.0 inches. For example, the golf linkage 104 may increase the length of the shaft 136 by 0.25, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, or 2.0 inches. The standard or neutral shaft length may be achieved when the removable spacer 216 and the removable extender 228 are not present in the golf linkage 104. The extended shaft 136 may be achieved when the golf linkage 104 includes the removable spacer 216 and the removable extender 228.

[0055] (Manufacturing method) In many embodiments, a method for forming the club head 100 includes forming the club head 100 having a striking face 108, a rear 112, an upper rail 116, a sole 120, a toe 124, a heel 128, and a hosel 132. In some embodiments, the striking face 108 may be formed integrally with the club head 100, including the rear 112, an upper rail 116, a sole 120, a toe 124, a heel 128, and a hosel 132. Forming the club head 100 may include casting, 3D printing, machining, or any other suitable method for forming the club head 100.

[0056] In other embodiments, the striking face 108 may be formed separately from the club head 100. Forming the separate striking face 108 may include machining, 3D printing, casting, or any suitable method for forming the separate striking face 108. In many embodiments, securing the striking face 108 to the club head 100 may be accomplished by welding, mechanical fastening, or any other suitable method of securing the separate striking face 108 to the club head 100.

[0057] The club head 100 may be formed of a metal, examples of which may include, but are not limited to, for example, steel, alloy steel, stainless steel, stainless alloy steel, C300, C350, Ni (nickel)-Co (cobalt)-Cr (chromium) alloy steel, 8620 alloy steel, S25C steel, 303SS, 17-4SS, carbon steel, maraging steel, 565 steel, AISI type 304 or AISI type 630 stainless steel, titanium alloys, Ti-6-4, Ti-3-8-6-4-4, Ti-10-2-3, Ti15-3-3-3, Ti15-5-3, Ti185, Ti6-6-2, Ti-7s, Ti-9s, Ti-92, or Ti-8-1-1 titanium alloys, amorphous metal alloys, or other similar metals.

[0058] The golf linkage 104 may be formed of a metal or polymeric material. The shaft sleeve 156, the removable spacer 216, and the removable extender 228 may be formed of aluminum, an aluminum alloy, titanium, or a titanium alloy. The shaft cap 192 may be formed of a soft material that allows the shaft cap 192 to be elastically compressed. For example, the shaft cap 192 may include a polymeric plastic material, which may be a thermoplastic material or a soft polymeric plastic according to the Shore D durometer scale. The soft polymeric plastic may be no more than 40, 45, 50, 55, or 60 on the Shore D durometer scale. The soft polymeric plastic may be no more than 55 on the Shore D durometer scale. The polymeric plastic material may be comprised of polystyrene, polyvinyl chloride, nylon, polymethacrylate, rubber, polycarbonate, synthetic rubber, or copolymers thereof.

[0059] Substitution of one or more claimed elements constitutes a reconstruction, not a repair. Moreover, benefits, other advantages, and solutions to problems have been described with respect to specific embodiments. However, the benefits, advantages, solutions to problems, and any element or elements that may give rise to or make more evident any benefits, advantages, or solutions to problems should not be construed as a critical, essential, or essential feature or element of any or all of the claims.

[0060] Because the rules of golf may change from time to time (e.g., new rules may be adopted, or old rules may be eliminated or modified, by golf standards organizations and / or governing bodies such as the United States Golf Association (USGA), the Royal and American Golf Association (R&A), etc.), golf equipment related to the apparatus, methods, and articles of manufacture described herein may or may not conform to the rules of golf at any particular time. Accordingly, golf equipment related to the apparatus, methods, and articles of manufacture described herein may be advertised, offered for sale, and / or sold as conforming or non-conforming golf equipment. The apparatus, methods, and articles of manufacture described herein are not limited in this respect.

[0061] Furthermore, the embodiments and limitations disclosed herein are not dedicated to the public under the doctrine of dedication if the embodiment and / or limitation (1) is not explicitly claimed in the claims and (2) is equivalent or potentially equivalent to elements and / or limitations expressly recited in the claims under the doctrine of equivalents.

[0062] (Item 1) an iron-type club head having a loft angle greater than 28 degrees and a hosel; a golf club coupling mechanism configured to be inserted into the hosel and configured to couple a golf club shaft with the iron-type club head; the hosel includes a hosel bore configured to receive the golf linkage; the hosel bore has a hosel bore axis extending along a centerline of the hosel bore; The golf linkage mechanism includes: a shaft sleeve having a sleeve bore configured to receive an end of the shaft; a shaft cap configured to be inserted into the sleeve bore; The shaft sleeve comprises: a sleeve axis extending along a center line of the sleeve hole; a sleeve coupler set having a plurality of sleeve couplers protruding from an outer surface of the shaft sleeve, The coupler set includes: a first coupler having a curved arcuate surface throughout the first coupler; a second coupler having a curved arcuate surface throughout the second coupler; and a third coupler having a curved arcuate surface throughout the third coupler; and a fourth coupler having a curved arcuate surface throughout the fourth coupler; the sleeve axis is angled relative to the hosel bore axis such that the sleeve bore is not concentric with the hosel bore; The golf club, wherein the golf linkage is configured to rotate within the hosel to change the loft and lie angles of the iron-type club head.

[0063] (Item 2) The sleeve coupler set of the shaft sleeve includes: a fifth coupler having a curved arcuate surface throughout the fifth coupler; and Item 1. The golf club of item 1, further comprising: a sixth connector, the sixth connector having a curved arcuate surface throughout the sixth connector.

[0064] (Item 3) The sleeve coupler set of the shaft sleeve includes: a seventh coupler having a curved arcuate surface throughout the seventh coupler; and Item 3. The golf club of item 2, further comprising: an eighth connector, the eighth connector having a curved arcuate surface throughout the eighth connector.

[0065] (Item 4) the hosel bore includes a receiver coupler set having a plurality of receiver couplers recessed into an inner surface of the hosel; The receiving coupler set includes: a first receiving coupler having a curved arcuate surface throughout the first receiving coupler; and a second receiving coupler having a curved arcuate surface throughout the second receiving coupler; and a third receiving coupler having a curved arcuate surface throughout the third receiving coupler; and Item 2. The golf club of item 1, comprising: a fourth receiving coupler, the fourth receiving coupler having a curved arcuate surface throughout the fourth receiving coupler.

[0066] (Item 5) The receiving coupler set in the hosel bore is a fifth receiving coupler having a curved arcuate surface throughout the fifth receiving coupler; and Item 5. The golf club of item 4, further comprising: a sixth receiving coupler, the sixth receiving coupler having a curved arcuate surface throughout the sixth receiving coupler.

[0067] (Item 6) The receiving coupler set in the hosel bore is a seventh receiving coupler having a curved arcuate surface throughout the sixth receiving coupler; and Item 6. The golf club of item 5, further comprising: an eighth receiving coupler, the eighth receiving coupler having a curved arcuate surface throughout the eighth receiving coupler.

[0068] (Item 7) 5. The golf club of claim 4, wherein the sleeve coupler set of the shaft sleeve is configured to seat within the receiving coupler set of the hosel bore to limit the rotation of the shaft relative to the iron-type club head.

[0069] (Item 8) an iron-type club head having a loft angle greater than 28 degrees and a hosel; a golf club coupling mechanism configured to be inserted into the hosel and configured to couple a golf club shaft with the iron-type club head; the hosel includes a hosel bore configured to receive the golf linkage; the hosel bore has a hosel bore axis extending along a centerline of the hosel bore; The golf linkage mechanism includes: a shaft sleeve having a sleeve hole configured to receive an end of the shaft, the shaft sleeve comprising: an upper section; a lower section; a sleeve coupler set having a plurality of sleeve couplers protruding from an outer surface of the upper section; and a sleeve axis extending along a centerline of the sleeve hole; a shaft cap configured to be inserted into the sleeve bore; a removable spacer configured to couple with the upper section of the shaft sleeve; a removable extender configured to couple with the lower section of the shaft sleeve; the sleeve axis is angled relative to the hosel bore axis such that the sleeve bore is not concentric with the hosel bore; the golf linkage is configured to rotate within the hosel to change the loft and lie angles of the iron-type club head; The golf club, wherein the golf linkage is configured to change the length of the golf club shaft.

[0070] (Item 9) the removable spacer further comprises a receiving coupler set having a plurality of receiving couplers; 9. The golf club of claim 8, wherein the sleeve coupler set of the shaft sleeve is configured to position within the receiving coupler set of the removable spacer to limit the rotation of the shaft sleeve relative to the removable spacer.

[0071] (Item 10) Item 9. The golf club of item 8, wherein the removable spacer further comprises a spacer connector set having a plurality of spacer connectors protruding from an outer surface of the removable spacer.

[0072] (Item 11) the hosel bore includes a receiver coupler set having a plurality of receiver couplers recessed into an inner surface of the hosel; Item 11. The golf club of item 10, wherein the spacer connector set of the removable spacer is configured to seat in the receiving connector set of the hosel bore to limit the rotation of the golf linkage relative to the iron-type club head.

[0073] (Item 12) Item 9. The golf club of item 8, wherein the shaft sleeve further comprises a locking channel disposed in the lower section of the shaft sleeve.

[0074] (Item 13) the removable extender comprises a first engagement member and a second engagement member; 13. The golf club of claim 12, wherein the first and second engagement members of the removable extender are configured to interlock with the locking channel of the shaft sleeve to limit rotation of the removable extender relative to the shaft sleeve.

[0075] (Item 14) 14. The golf club of claim 13, wherein the removable extender is secured to the shaft sleeve without the use of threads.

[0076] (Item 15) 1. A golf linkage configured to connect an iron-type club head and a golf club shaft, comprising: The golf linkage mechanism includes: a shaft sleeve having a sleeve bore configured to receive an end of the shaft, the shaft sleeve comprising an upper section, a lower section, and a sleeve coupler set having a plurality of sleeve couplers protruding from an outer surface of the upper section; a shaft cap configured to be inserted into the sleeve bore; a removable spacer configured to couple with the upper section of the shaft sleeve; a removable extender configured to couple with the lower section of the shaft sleeve; A golf linkage, wherein the removable extender is non-threadably fixed to the shaft sleeve.

[0077] (Item 16) the removable spacer further comprises a receiving coupler set having a plurality of receiving couplers; 16. The golf club of claim 15, wherein the sleeve coupler set of the shaft sleeve is configured to seat within the receiving coupler set of the removable spacer to limit rotation of the shaft sleeve relative to the removable spacer.

[0078] (Item 17) 16. The golf club of claim 15, wherein the removable spacer further comprises a spacer coupler set protruding from an outer surface of the removable spacer.

[0079] (Item 18) The golf club of claim 15 , wherein the shaft sleeve further comprises a locking channel disposed in the lower section of the shaft sleeve.

[0080] (Item 19) the removable extender comprises a first engagement member and a second engagement member; 20. The golf club of claim 18, wherein the first and second engagement members of the removable extender are configured to interlock with the locking channel of the shaft sleeve to limit rotation of the removable extender relative to the shaft sleeve.

[0081] (Item 20) the shaft cap includes a plurality of ribs protruding from an inner surface of the shaft cap; 16. The golf club of claim 15, wherein the shaft cap has a plurality of ribs configured to center the shaft within the shaft sleeve of the golf linkage.

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

Claims

1. an iron-type club head having a loft angle greater than 28 degrees and a hosel; a golf club coupling mechanism configured to be inserted into the hosel and configured to couple a golf club shaft with the iron-type club head; the hosel includes a hosel bore configured to receive the golf linkage; the hosel bore has a hosel bore axis extending along a centerline of the hosel bore; The golf linkage mechanism includes: a shaft sleeve having a sleeve bore configured to receive an end of the shaft; a shaft cap configured to be inserted into the sleeve bore; The shaft sleeve comprises: a sleeve axis extending along a center line of the sleeve hole; a sleeve coupler set having a plurality of sleeve couplers protruding from an outer surface of the shaft sleeve, The coupler set includes: a first coupler having a curved arcuate surface throughout the first coupler; a second coupler having a curved arcuate surface throughout the second coupler; and a third coupler having a curved arcuate surface throughout the third coupler; and a fourth coupler having a curved arcuate surface throughout the fourth coupler; the sleeve axis is angled relative to the hosel bore axis such that the sleeve bore is not concentric with the hosel bore; The golf club, wherein the golf linkage is configured to rotate within the hosel to change the loft and lie angles of the iron-type club head.

2. The sleeve coupler set of the shaft sleeve includes: a fifth coupler having a curved arcuate surface throughout the fifth coupler; and The golf club of claim 1 , further comprising a sixth connector, the sixth connector having a curved arcuate surface throughout the sixth connector.

3. The sleeve coupler set of the shaft sleeve includes: a seventh coupler having a curved arcuate surface throughout the seventh coupler; and The golf club of claim 2 further comprising an eighth connector, the eighth connector having a curved arcuate surface throughout the eighth connector.

4. the hosel bore includes a receiver coupler set having a plurality of receiver couplers recessed into an inner surface of the hosel; The receiving coupler set includes: a first receiving coupler having a curved arcuate surface throughout the first receiving coupler; a second receiving coupler having a curved arcuate surface throughout the second receiving coupler; and a third receiving coupler having a curved arcuate surface throughout the third receiving coupler; and 2. The golf club of claim 1, further comprising: a fourth receiving coupler, the fourth receiving coupler having a curved arcuate surface throughout the fourth receiving coupler.

5. The receiving coupler set in the hosel bore is a fifth receiving coupler having a curved arcuate surface throughout the fifth receiving coupler; and 5. The golf club of claim 4, further comprising a sixth receiving coupler, the sixth receiving coupler having a curved arcuate surface throughout the sixth receiving coupler.

6. The receiving coupler set in the hosel bore is a seventh receiving coupler having a curved arcuate surface throughout the sixth receiving coupler; and 6. The golf club of claim 5, further comprising an eighth receiving coupler, the eighth receiving coupler having a curved arcuate surface throughout the eighth receiving coupler.

7. 5. The golf club of claim 4, wherein the sleeve coupler set of the shaft sleeve is configured to seat within the receiving coupler set of the hosel bore to limit the rotation of the shaft relative to the iron-type club head.

8. an iron-type club head having a loft angle greater than 28 degrees and a hosel; a golf club coupling mechanism configured to be inserted into the hosel and configured to couple a golf club shaft with the iron-type club head; the hosel includes a hosel bore configured to receive the golf linkage; the hosel bore has a hosel bore axis extending along a centerline of the hosel bore; The golf linkage mechanism includes: a shaft sleeve having a sleeve hole configured to receive an end of the shaft, the shaft sleeve comprising: an upper section, a lower section, a sleeve coupler set having a plurality of sleeve couplers protruding from an outer surface of the upper section, and a sleeve axis extending along a centerline of the sleeve hole; a shaft cap configured to be inserted into the sleeve bore; a removable spacer configured to couple with the upper section of the shaft sleeve; a removable extender configured to couple with the lower section of the shaft sleeve; the sleeve axis is angled relative to the hosel bore axis such that the sleeve bore is not concentric with the hosel bore; the golf linkage is configured to rotate within the hosel to change the loft and lie angles of the iron-type club head; The golf club, wherein the golf linkage is configured to change the length of the golf club shaft.

9. the removable spacer further comprises a receiving coupler set having a plurality of receiving couplers; 9. The golf club of claim 8, wherein the sleeve coupler set of the shaft sleeve is configured to mate with the receiving coupler set of the removable spacer to limit the rotation of the shaft sleeve relative to the removable spacer.

10. The golf club of claim 8 , wherein the removable spacer further comprises a spacer connector set having a plurality of spacer connectors protruding from an outer surface of the removable spacer.

11. the hosel bore includes a receiver coupler set having a plurality of receiver couplers recessed into an inner surface of the hosel; 11. The golf club of claim 10, wherein the spacer connector set of the removable spacer is configured to seat in the receiving connector set of the hosel bore to limit the rotation of the golf linkage relative to the iron-type club head.

12. The golf club of claim 8 , wherein the shaft sleeve further comprises a locking channel disposed in the lower section of the shaft sleeve.

13. the removable extender comprises a first engagement member and a second engagement member; 13. The golf club of claim 12, wherein the first and second engagement members of the removable extender are configured to interlock with the locking channel of the shaft sleeve to limit rotation of the removable extender relative to the shaft sleeve.

14. The golf club of claim 13 , wherein the removable extender is secured to the shaft sleeve without the use of threads.

15. 1. A golf linkage configured to connect an iron-type club head and a golf club shaft, comprising: The golf linkage mechanism includes: a shaft sleeve having a sleeve bore configured to receive an end of the shaft, the shaft sleeve comprising an upper section, a lower section, and a sleeve coupler set having a plurality of sleeve couplers protruding from an outer surface of the upper section; a shaft cap configured to be inserted into the sleeve bore; a removable spacer configured to couple with the upper section of the shaft sleeve; a removable extender configured to couple with the lower section of the shaft sleeve; A golf linkage, wherein the removable extender is non-threadably fixed to the shaft sleeve.

16. the removable spacer further comprises a receiving coupler set having a plurality of receiving couplers; 16. The golf club of claim 15, wherein the sleeve coupler set of the shaft sleeve is configured to seat within the receiving coupler set of the removable spacer to limit rotation of the shaft sleeve relative to the removable spacer.

17. The golf club of claim 15 , wherein the removable spacer further comprises a set of spacer couplers protruding from an outer surface of the removable spacer.

18. The golf club of claim 15 , wherein the shaft sleeve further comprises a locking channel disposed in the lower section of the shaft sleeve.

19. the removable extender comprises a first engagement member and a second engagement member; 19. The golf club of claim 18, wherein the first and second engagement members of the removable extender are configured to interlock with the locking channel of the shaft sleeve to limit rotation of the removable extender relative to the shaft sleeve.

20. the shaft cap includes a plurality of ribs protruding from an inner surface of the shaft cap; The golf club of claim 15 , wherein the shaft cap has a plurality of ribs configured to center the shaft within the shaft sleeve of the golf linkage.

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