Abstract: A golf club head, when oriented in a reference position, includes: a striking face; a top portion; and a sole portion opposite the top portion. The sole portion includes a leading edge, a trailing edge, at least one sole rail generally elongate in a front-to-rear direction, and a sole contact point located on the at least one sole rail. In a virtual vertical plane extending in the front-to-rear direction and passing through the sole contact point, (i) the sole portion includes a sole length Ls measured in the front-to-rear direction from the leading edge to the trailing edge and (ii) the sole contact point is spaced rearwardly from the leading edge by a distance D1 no greater than 0.8*Ls.

Abstract: Described herein are embodiments of golf club heads having a balance of the following parameters: a low and back club head center of gravity position, a high moment of inertia, and low aerodynamic drag. Methods of manufacturing the embodiments of golf club heads having a balance of club head center of gravity position, moment of inertia, and aerodynamic drag are also described herein.

Abstract: Embodiments of golf clubs with coupling mechanisms are presented herein. In some embodiments, a golf club comprises a shaft having a shaft bore and a first end, and a club head having a coupling mechanism, the coupling mechanism including a hosel, an insert configured to be positioned within the hosel, the insert including a top end, a bottom end, an insert bore configured to receive the first end of the shaft, the insert bore having a bottom surface and an insert bore depth measured from the bottom surface to the top end of the insert, and a reinforcement member extending from the bottom surface of the insert bore, the reinforcement member configured to be positioned within the shaft bore to reinforce the coupling mechanism.

Abstract: An aerodynamic golf club head producing reduced aerodynamic drag forces via unique club head curvatures and relationships.

Abstract: A golf club head with a multi-material construction in which a portion of the club head is a first material such as engineered stone or concrete and a second portion of the club head is a second material such as a metal, thermoplastic, or a composite.

Abstract: Golf club heads with cavities and inserts, and methods to manufacture golf club heads with cavities. Various embodiments include a golf club head comprising a body. The body comprises a strikeface at a front of the golf club head, a backface opposite the strikeface, a heel region, a toe region opposite the heel region, a sole, a rear portion at a rear of the golf club head, and a cavity located between the backface and the rear portion. In many embodiments, the body further comprises an insert within the cavity.

Abstract: The present invention relates to an iron-type golf club head having a lightweight hosel and a high, toe-ward located center of gravity. The golf club head preferably includes a hollow body with a hosel and an interior mold line that extends into the hosel and is separated from a shaft bore by a solid barrier that does not include any through-holes. An upper portion of the body may include a pocket to hold a high-density weight, and the hosel wall may include multiple through-bores to further lighten the hosel. The golf club head may also include one or more internal ribs extending from the hollow interior of the body into the interior of the hosel.

Abstract: A golf club head having a hosel, a hollow interior, and a support ring disposed within the hollow interior and at least partially encircling the hosel is disclosed herein. In particular, the present invention is directed to a fairway wood head comprising a body with a front wall, an upper opening, a return portion between the front wall and the upper opening, a hosel, an interface between the hosel and the heel side of the body, and a support ring, and a composite crown affixed to the body to close the upper opening and define a hollow interior, the support ring contained within the hollow interior and extending along the interface from a heel-most side of the body to the return portion and making contact with an inner surface of the front wall. The support ring reduces the stresses placed on, for example, the crown during hosel bending processes.

Abstract: An adjustable shaft and hosel assembly allows for dependent and independent adjustment of a golf club's face angle, loft angle, and lie angle. The adjustable shaft and hosel assembly comprises a shaft sleeve, a hosel portion, a tubular adjustment piece having non-parallel upper and lower surfaces, and a retention feature that provides an engagement between the tubular adjustment piece and the shaft sleeve to prevent the tubular adjustment piece from becoming detached from the shaft sleeve.

Abstract: According to one aspect of the present invention there is provided an adjustable connector including at least two parts, each having a main body with a bore having a longitudinal axis therein, wherein an external surface of the main body of a first part is configured to bear against an internal surface of the bore of a second part when the first part is at least partially inserted into the bore of the second part to form a connection, characterized in that the positioning of the bores with respect to the main bodies is such that when the parts are connected to each other, rotation of one part with respect to the other changes the inclination of the longitudinal axes of the bores with respect to one another.

Abstract: A golf club having improved visual feature recognition includes a golf club head coupled to a golf club shaft. The golf club head includes a hosel defining a bore, a sole, and a design attribute that is generally not capable of easy visual discernment. The bore has a first portion having a first diameter, a second portion having a second diameter that is smaller than the first diameter, and a transition from the first diameter to the second diameter. The bore extends through the golf club head to the sole, and the golf club shaft is disposed within the first portion of the bore and secured to the hosel. A polymeric plug is disposed within the bore between the golf club shaft and the sole. The polymeric plug includes a restraining feature that contacts the transition to prevent withdrawal of the polymeric plug through the sole, and is a color that corresponds to the design attribute.

Abstract: The present invention relates to an iron-type golf club head having a lightweight hosel and a high, toe-ward located center of gravity. The golf club head preferably includes a hollow body with a hosel and an interior mold line that extends into the hosel and is separated from a shaft bore by a solid barrier that does not include any through-holes. An upper portion of the body may include a pocket to hold a high-density weight, and the hosel wall may include multiple through-bores to further lighten the hosel. The golf club head may also include one or more internal ribs extending from the hollow interior of the body into the interior of the hosel.

Abstract: Disclosed herein are embodiments of adjustable golf clubs comprising features which allow for the adjustment of a lie angle, a loft angle, or both a lie angle and a loft angle of the golf club. In some embodiments, a golf club head includes a body and a hosel, the hosel including an adjustment screw which can be tightened or loosened to adjust the lie and/or loft angles of a golf club head. In some embodiments, certain angles of a golf club head's geometry can be continuously adjustable through a predetermined range of angles.

Abstract: A golf club incorporating an interchangeable shaft system includes a shaft, a shaft sleeve, a club head. The shaft sleeve is coupled to an end of the shaft and is received in a hosel included in the club head. The shaft sleeve is removably coupled to the club head. Alignment features on the components provide discrete orientations between the shaft and club head.

Abstract: A golf club includes a golf club head and a shaft attached to the golf club head, the golf club including the golf club head provided with a shaft insertion hole having an upper opening and a lower opening, the shaft insertion hole having an internal surface provided with an undercut groove, the shaft having a tip end, a shaft sleeve adaptor attached to the tip end of the shaft, the shaft sleeve adaptor inserted into the shaft insertion hole through the upper opening and having a first thread portion, a fastener comprising a second thread portion engaging with the first thread portion of the shaft sleeve adaptor through the lower opening of the shaft insertion hole, and a washer held in the undercut groove of the shaft insertion hole and disposed between the fastener and the shaft sleeve adaptor.

Abstract: A ferrule includes: an upper body which projects from an upper end face of a hosel portion; an inserted portion which is provided to project downwards from the upper body to be inserted into an interior of a hosel hole; and a groove which is provided circumferentially on an outer circumferential surface of the inserted portion, wherein a lower end portion of the inserted portion has a diameter which is smaller than that of an upper side of the inserted portion than the groove.

Abstract: An adjustable shaft and hosel assembly allows for dependent and independent adjustment of a golf club's face angle, loft angle, and lie angle. The adjustable shaft and hosel assembly comprises a shaft sleeve and a tubular adjustment piece, which may be a shim or a wheel, that encircles at least a part of the shaft sleeve and is disposed within a hosel bore.

Abstract: Golf club heads are releasably engaged with shafts so that the club heads and shafts can be readily interchanged and/or so that the shaft position with respect to the club head can be readily changed. Assemblies for connecting the club head and shaft may include: a shaft adapter, a collet, a ferrule, and a club head having an interior chamber. The club head and shaft may be changed by releasing the securing system and exchanging the original parts with different parts. Furthermore, the shaft may be bent or otherwise extend at an angle from the shaft adapter so as to allow adjustment of the shaft position with respect to the club head.

Abstract: A golf club incorporating an interchangeable shaft system includes a shaft, a shaft sleeve, a club head. The shaft sleeve is coupled to an end of the shaft and is received in a hosel included in the club head. The shaft sleeve is removably coupled to the club head. Hosel and shaft sleeve alignment features provide discrete orientations between the shaft and club head.

Abstract: Aspects of this invention relate to structures and methods for connecting golf club heads to shafts in a releasable and adjustable manner allowing independent adjustability of face angle, loft angle, and lie angle of a club head. Assemblies for connecting the club head and shaft may include: (a) a hosel assembly; (b) an adjustment member; and (c) a securing system for releasably and adjustably securing the hosel assembly and adjustment member to the club head. The face angle, loft angle, and lie angle may be independently adjusted by releasing the securing system and rotating the different structures or exchanging the original parts with different parts.

Abstract: According to an aspect of this invention, a golf club includes: a shaft; a head attached to a distal end of the shaft; a substantially cylindrical shaft case is secured to the distal end of the shaft; the shaft case is inserted into a hosel hole in the head; and the shaft case is fixed to the head by a bolt which is inserted from a sole side of the head, wherein: a stopper member is attached to an outer circumference of the shaft case so that an attaching position can be changed; the stopper member is in abutment with an upper end portion of a hosel; and an inserting depth of the shaft case into the hosel hole can be changed by changing the attaching position of the stopper member.

Abstract: Embodiments of golf coupling mechanisms are presented herein. Other examples and related methods are also disclosed herein.

Abstract: Embodiments of golf coupling mechanisms are presented herein. Other examples and related methods are also disclosed herein.

Abstract: A golf club with a tubular pad, which includes a head, a removable assembly and a shaft, is proposed. The head has a through hole and an annular protrusion protruding inwardly from an inner periphery defining the through hole. The removable assembly has a sleeve, a tubular pad and a fixing member, with the sleeve received in an end of the through hole, with the tubular pad received in the through hole, engaging with the annular protrusion and axially extending from a side of the annular protrusion to another side of the annular protrusion, with the fixing member piercing through the tubular pad, coupling with the sleeve by a fixing portion and pressing the annular protrusion via the tubular pad by a head portion. The shaft inserts into and clamped by the sleeve. Accordingly, anti-disengagement and protection of members by a convenient insertion process is easily achieved.

Abstract: Disclosed is a golf club having a structure with which optional angle adjustment can be easily and firmly performed by a user himself/herself without changing the direction of a shaft along the circumference thereof with respect to a head. To this end, the distal end portion of the shaft to which a plug member is fixed is fitted into a shaft insertion hole of a hosel portion from above, an angle adjusting member is fitted from below, and a fixing bolt is fitted into a bolt insertion hole of the angle adjusting member and screwed into an internal thread portion of the plug member.

Abstract: A golf club comprises a shaft, a club head, and a connection assembly that allows the shaft to be easily disconnected from the club head. In particular embodiments, a sleeve including a top portion, a middle portion connected to the top portion is described. The middle portion includes a thin wall thickness. A bottom portion is connected to the middle portion including a plurality of engaging surfaces. A central longitudinal axis and an offset angle offset from the central longitudinal axis is described. The offset angle allows a maximum loft change of about 0.5 degrees to about 4.0 degrees. The total weight of the sleeve is less than 9 g.

Abstract: A golf club head with an improved Moment of Inertia (MOI) is disclosed herein. More specifically, the present invention relates to a golf club head with a releasable hosel mechanism that is leaner and more lightweight, it allows a significant amount of weight to be saved from the hosel portion of the golf club head and used to improve Center of Gravity (CG) location of the golf club head; which contributes to the improvement of the MOI of the golf club head.

Abstract: A golf club incorporating an interchangeable shaft system includes a shaft, a shaft sleeve, a club head. The shaft sleeve is coupled to an end of the shaft and is received in a hosel included in the club head. The shaft sleeve is removably coupled to the club head. Hosel and shaft sleeve alignment features provide discreet orientations between the shaft and club head.

Abstract: A golf club comprises a shaft, a club head, and a connection assembly that allows the shaft to be easily disconnected from the club head. In particular embodiments, a sleeve including a top portion, a middle portion connected to the top portion is described. The middle portion includes a thin wall thickness. A bottom portion is connected to the middle portion including a plurality of engaging surfaces. A central longitudinal axis and an offset angle offset from the central longitudinal axis is described. The offset angle allows a maximum loft change of about 0.5 degrees to about 4.0 degrees. The total weight of the sleeve is less than about 9 g.

Abstract: A golf club incorporating an interchangeable shaft system includes a shaft, a shaft sleeve, a club head. The shaft sleeve is coupled to an end of the shaft and is received in a hosel included in the club head. The shaft sleeve is removably coupled to the club head. Hosel and shaft sleeve alignment features provide discrete orientations between the shaft and club head.

Abstract: Embodiments of shaft plugs for golf clubs and methods to manufacture golf clubs with shaft plugs are generally described herein. Other embodiments of shaft plugs may be described and claimed.

Abstract: Embodiments of golf club heads with hosel inserts are presented herein. Other embodiments can be described and claimed.

Abstract: A golf club 2 is provided with a head 4, a shaft 6, a tip member 8, and a screw member 10. The shaft 6 is inserted into a shaft hole of the tip member 8, and a tip part of the shaft 6 is fixed to the shaft hole. An axis line s1 of the shaft 6 is inclined with respect to an axis line z1 of the tip member 8. The head 4 has a head hole into which the tip member is inserted, a head side engaging part capable of being engaged with the tip member 8 inserted into the head hole, and a through hole into which the screw member 10 can be inserted. The tip member 8 has a shaft side engaging part 38 capable of being engaged with the head side engaging part.

Abstract: A golf club can include a universal hosel and/or hosel spacer that allows the golf club to be used with a variety of different sized club head shafts. The universal hosel can include multiple steps or ledges, and various inner diameters to accommodate different sized shafts. The spacer can be a self-expanding spacer, and can be pre-coated with epoxy. The spacer can fill in gaps within a hosel, so as to accommodate different sized shafts.

Abstract: An adjustable golf club including a shaft and hosel assembly allows for dependent and independent adjustment of a golf club's face angle, loft angle, and lie angle. The adjustable shaft and hosel assembly comprises a shaft sleeve, a hosel portion, and at least one tubular adjustment piece having non-parallel upper and lower surfaces, wherein the shaft sleeve, hosel, and tubular adjustment piece each include markings that combine to form a code that correlates to a unique angular setting and is readable by an electronic device. The adjustable golf club may also comprise an audible feedback system including an indexing ring that interacts with indexing features in the tubular adjustment piece.

Abstract: A golf club includes: a shaft; a head mounted on a leading end of the shaft; and a substantially cylindrical shaft case fixed to the leading end of the shaft, wherein: the shaft case is inserted into the tubular portion of the hosel of the head; the tubular portion includes a partition plate section in the lower portion thereof; a spacer is interposed between the leading end of the shaft case and partition plate section; the shaft case is unrotatably engaged with the spacer; the spacer and partition plate section respectively include stopper portions for preventing the rotation of the spacer; and a bolt inserted through bolt insertion holes respectively formed in the partition plate section and spacer from the sole side of the head is screwed into the shaft case, whereby the shaft case is fixed to the head.

Abstract: Embodiments of golf coupling mechanisms are presented herein. Other examples and related methods are also disclosed herein.

Abstract: A wood-type golf club head comprises a body having one or more ribs extending across the internal surface of the sole. The plurality of ribs can include two or more ribs, such as three or four ribs, that converge at a convergence location, such as above a recessed pocket in the sole configured to receive an adjustable sole piece. At least one rib can extend along an internal surface of the recessed pocket and along an internal surface of a surrounding sole region. The ribs can extend from the convergence location to a toe weight port, to a heel weight port, to a rear portion of the body and/or toward the face. At least one rib can extend from a hosel, such as to the toe weight port.

Abstract: A temporary shaft-component connection for assembling a selected golf club shaft with a club head and/or hand grip segment is disclosed to facilitate custom club design and fitting. The temporary shaft-component connection is designed for use with nonmetallic club shafts formed from a graphite-based composite material or the like having a range of different lengths and stiffness characteristics. In a shaft-head connection, a metal adapter insert is mounted onto a lower end of the club shaft and includes one or more flat surfaces for reception into a matingly shaped socket in the hosel of a selected club head to prevent relative rotation between the club shaft and head. A compression nut carried on the shaft is threaded onto the hosel to axially engage and retain a thrust flange on the shaft or adapter or adapter insert, to prevent axial separation of the club head and shaft.

Abstract: A golf club incorporating an interchangeable shaft system includes a shaft, a shaft sleeve, a club head. The shaft sleeve is coupled to an end of the shaft and is received in a hosel included in the club head. The shaft sleeve is removably coupled to the club head. Hosel and shaft sleeve alignment features provide discrete orientations between the shaft and club head.

Abstract: A golf club incorporating an interchangeable shaft system includes a shaft, a shaft sleeve, a club head. The shaft sleeve is coupled to an end of the shaft and is received in a hosel included in the club head. The shaft sleeve is removably coupled to the club head. Hosel and shaft sleeve alignment features provide discrete orientations between the shaft and club head.

Abstract: A golf club comprises a shaft, a club head, and a connection assembly that allows the shaft to be easily disconnected from the club head. In particular embodiments, the connection assembly includes a removable hosel sleeve that allows a shaft to be supported a desired predetermined orientation relative to the club head. In this manner, the shaft loft and/or lie angle of the club can be adjusted without resorting to traditional bending of the shaft. In another embodiment, the club head has an adjustable sole that can be adjusted upwardly and downwardly relative to the strike face of the club head, which is effective to adjust the face angle of the club head.

Abstract: An adjustable shaft and hosel assembly allows for dependent and independent adjustment of a golf club's face angle, loft angle, and lie angle. The adjustable shaft and hosel assembly comprises a shaft sleeve and a tubular adjustment piece, which may be a shim or a wheel, that encircles at least a part of the shaft sleeve and is disposed within a hosel bore.

Abstract: In an embodiment, a golf club includes a striking face, a top portion, a sole portion opposite the top portion, and a shaft assembly. The shaft assembly can include a shaft having a butt end and a tip end, and a shaft sleeve located at the tip end, the shaft sleeve including indicia, and a hosel extending from the top portion. The hosel can include a sidewall, an internal bore for receiving the shaft assembly, and an aperture extending through, and circumscribed by, the sidewall such that the indicia of the shaft sleeve corresponds with the aperture.

Abstract: A golf club head (40) with a face component (50), an aft body (70), and an aerodynamic hosel (50) is disclosed herein. The hosel (50) has one or more joints (80, 85, 87) around which pieces or segments of the hosel (50) may be rotated or pivoted to modify the way in which a shaft is oriented with respect to the club head (40) when the hosel (50) is rigidly affixed to the club head (40). The present invention may be used to modify the loft, lie, and/or face angle parameters of the golf club head.

Abstract: A length adjustment system for joining a golf club head to a shaft is provided. The length adjustment system may be utilized to produce a minor length and an intermediate length of a golf club. In a minor length configuration, the length adjustment system includes a shaft sleeve attached to an end of the shaft. The minor length configuration also features a minor length weight system. The intermediate length configuration further includes a first hosel sleeve and an intermediate length weight system. The length adjustment system results golf club that has similar characteristics in each configuration.

Abstract: A golf club comprises a shaft, a club head, and a connection assembly that allows the shaft to be easily disconnected from the club head. In particular embodiments, the connection assembly includes a removable hosel sleeve that allows a shaft to be supported a desired predetermined orientation relative to the club head. In this manner, the shaft loft and/or lie angle of the club can be adjusted without resorting to traditional bending of the shaft. In another embodiment, the club head has an adjustable sole that can be adjusted upwardly and downwardly relative to the strike face of the club head, which is effective to adjust the face angle of the club head.

Abstract: A golf club 2 is provided with a head 4, a shaft 6, a tip member 8, and a screw member 10. The shaft 6 is inserted into a shaft hole of the tip member 8, and a tip part of the shaft 6 is fixed to the shaft hole. An axis line s1 of the shaft 6 is inclined with respect to an axis line z1 of the tip member 8. The head 4 has a head hole into which the tip member is inserted, a head side engaging part capable of being engaged with the tip member 8 inserted into the head hole, and a through hole into which the screw member 10 can be inserted. The tip member 8 has a shaft side engaging part 38 capable of being engaged with the head side engaging part. Circumferential relative positions A in which the head side engaging part and the shaft side engaging part can be engaged with each other are M kinds.

Abstract: A golf club includes: a hosel of a head to which a leading end of a shaft is attached; a weight material for adjusting weight being provided in a lower end portion of a hosel hole; and a communication opening which communicates the lower end portion of the hosel hole with an inside of the head, wherein the weight material is detachably screwed into the communication opening.

Abstract: A golf club includes: a shaft; a head including a hosel formed with a hosel hole; a shaft case with a substantially tube shape being bonded to a leading end of the shaft, the shaft case being inserted into the hosel hole, the shaft case being fixed to the hosel by a ring-shaped screw member fitted onto an upper portion of the shaft case and detachably screwed into a female screw in an inner circumferential surface of the hosel hole, wherein an outer side surface of a lower side part of the shaft case and a lower side part of the hosel hole have non-circular cross-section shapes.