Abstract: This disclosure relates to an alignment aid for a golf club. The alignment aid provides a golf club with one or more markings on or adjacent the hosel of the golf club, and can be used by the golfer to achieve a proper alignment. In particular, the alignment aid may include at least two markings, each of which can be used by the golfer to assist the golfer in achieving the proper alignment corresponding to a desired type of golf shot. As an example, the golfer may use one marking to achieve a proper alignment for a pitch shot, and the golfer may use another marking to achieve a proper alignment for a bunker shot.

Abstract: A golf club head comprises a sole, a recessed sole port in the sole; and a rotatably adjustable sole piece adapted to be at least partially received within the sole port and comprising a central body having a plurality of contact surfaces adapted to contact the sole port and being offset from each other along a central axis extending through the central body of the sole piece. The sole piece can be positioned at least partially within the sole port at five or more rotational and axial positions with respect to the central axis, wherein at each rotational position, at least one of said contact surfaces of the central body contacts the sole port to set the axial position of the sole piece. The sole port and/or the sole piece can be generally pentagonal in shape.

Abstract: A coupling for securing a golf shaft to a golf club head includes a first component configured to contact, and engage with, the golf shaft, and a second component bonded to the first component and configured to space the first component from the golf club head. The second component includes a second material having a Young's modulus less than a first material of the first component. In another aspect, a coupling includes a shaft engagement element, and a spacer configured to space the first component from the golf club head so that the golf shaft is above the golf club head in its entirety. The spacer includes a material having a Young's modulus no greater than about 10 Gpa. In another aspect, a kit includes a first coupling and a second coupling with at least one of a structural configuration or a material of a vibration dampening element differing.

Abstract: A golf putter club head that is adjustable in loft. A face component with a blade adjustably engages a housing component that is attachable to a golf club shaft. At least one of a plurality of adjusting components is engaged to adjust the loft of the blade relative to the housing component. A securing component is engaged to temporarily fix the loft by securing the face component to the housing component.

Abstract: A sleeve 8 includes an engaging projection part P1. A head 2 includes an engaging recess part R1. The engaging projection part P1 includes a first side surface P11 located on a side receiving a rotating force caused by hitting, a second side surface P12 located on an opposite side to the first side surface P11, and an outer surface P13. The engaging recess part R1 includes a first opposed surface R11 opposed to the surface P11, a second opposed surface R12 opposed to the surface P12, and an inner surface R13 opposed to the surface P13. The engaging projection part P1 has a tapered projection part TP1. The tapered projection part TP1 has a maximum width of not less than an opening width of the engaging recess part R1. At least one of the first side surface and the first opposed surface extends along an axial direction.

Abstract: A golf club head comprising a channel and a sliding weight that can be reversibly fixed at any point within the channel is disclosed herein. The channel preferably is disposed on the sole and extends from a heel side of the golf club head, around a rear side, and ends at a toe side of the golf club head. This channel is not constrained to a planar arc, but instead twists as it extends around the golf club head so that it follows the contours, and preserves the aesthetics, of the golf club head. The slidable weight comprises a base portion and a first cap, and a second cap that has the same dimensions as, and is interchangeable with, the first cap is disposed in a pocket in the sole proximate the face of the golf club head.

Abstract: A golf club head comprising a channel and a sliding weight that can be reversibly fixed at any point within the channel is disclosed herein. The channel preferably is disposed on the sole and extends from a heel side of the golf club head, around a rear side, and ends at a toe side of the golf club head. This channel is not constrained to a planar arc, but instead twists as it extends around the golf club head so that it follows the contours, and preserves the aesthetics, of the golf club head. The slidable weight comprises a base portion and a first cap, and a second cap that has the same dimensions as, and is interchangeable with, the first cap is disposed in a pocket in the sole proximate the face of the golf club head.

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.

Abstract: A golf club head comprising a channel and a sliding weight that can be reversibly fixed at any point within the channel is disclosed herein. The channel preferably is disposed on the sole and extends from a heel side of the golf club head, around a rear side, and ends at a toe side of the golf club head. This channel is not constrained to a planar arc, but instead twists as it extends around the golf club head so that it follows the contours, and preserves the aesthetics, of the golf club head. The slidable weight comprises a base portion and a first cap, and a second cap that has the same dimensions as, and is interchangeable with, the first cap is disposed in a pocket in the sole proximate the face of the golf club head.

Abstract: Golf club heads include a golf club head body, a ball striking face, and a shaft engaging member configured to engage a golf club shaft with the golf club head body. Further, the shaft engaging member may be configured to engage the golf club head body and the shaft below a center of gravity of the golf club head.

Abstract: Golf club heads include a golf club head body, a ball striking face, and a shaft engaging member configured to engage a golf club shaft with the golf club head body. Further, the shaft engaging member may be configured to engage the golf club head body and the shaft below a center of gravity of the golf club head.

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.

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: This club's design provides the ability to change the blade's alignment with the hosel and shaft without any loosening or disassembly of the club's parts. The blade is placed and kept firmly in its various positions through the use of spring loaded “pins”. A similar provision is made for changing the length of the club shaft: it will be “pinned” in an appropriate length, matching the position of the blade.

Abstract: A golf club having a shaft and an elongated head projecting at a lie angle relative to the shaft, the head having the shape of a regular polygon in a cross section at right angles to the central axis of the head, with each face being formed of a material that provides a different ball rebound factor, the head section being rotatable about the central axis so that any one of the faces may be presented for use with the club.

Abstract: A golf club includes a shaft and a neck is connected to an end of the shaft. A connection rod extends from the neck. A club head has a connection member at an end thereof and the connection rod is rotatably inserted in the connection member. A positioning assembly extends in the connection member from a side of the connection member and contacts the connection rod which is fixed at a pre-selected angle relative to a vertical plane by the positioning assembly.

Abstract: A golf club includes a shaft, a hosel mounted on the lower end of the shaft and a golf club head mounted on the hosel for pivotal movement about an axis which is generally horizontal when the club is in an addressed position. The golf club head includes a blade portion pivotally mounted to a heel portion. A lever is operably connected to a linkage assembly so that the lever can be moved from a first position in which the linkage assembly secures the blade to the heel and a second position in which the linkage assembly allows disengagement of the blade from the heel so that the blade may be rotated relative to the heel.

Abstract: The various embodiments of the disclosure are directed to a golf club head having adjustable loft and lie angles, wherein the loft and lie angles are hydrodynamically locked during impact of the club head with the ball.

Abstract: A golf club fitting device (20) is disclosed herein. The fitting device (20) includes a club head (22) with an internal hosel (38) that has a bore (39) that extends from a crown opening (52) to a sole opening (62). A removable insert (51) is disposed within the internal hosel (38), and a shaft (40) is disposed within a chamber (77) of the removable insert (51). The removable insert (51) has an annular indentation (73) for engagement with a locking member (57), and a plurality of recesses (83) for engagement with a rotation detent (59). The chamber (77) is disposed at a predetermined angle within the removable insert (51) to define a face angle of the golf club fitting device (20). The removable insert (51) is capable of rotation within the bore (39) of the internal hosel (38) to adjust the face angle of the fitting device (20). Further, the removable insert (51) and shaft (40) are easily removed from the club head (22) and substituted therefor.

Abstract: The various embodiments of the invention are directed to a golf club head having an adjustable loft, wherein the loft angle is hydrodynamically locked during impact of the club head with the ball.

Abstract: A golf club head (16) is provided with a rough heel end surface (40) that surrounds a threaded opening (38) that enters into the heel (36) of the club head (16) and extends substantially longitudinally of the club head (16). A thin washer (42) is placed against the rough surface (40) then, a similar rough surface (24) on a hosel eye (20) is moved into contact with the opposite surface of the washer (42). A connector bolt (18) is inserted through an opening (22) in the hosel eye (20) and is threaded into the opening (38) in the club head (16). The club head (16) is rotated relative to the club hosel (14) to place it into a desired loft angle. Then, the bolt (18) is tightened. This draws the rough surfaces (24, 40) into tight contact with the washer (42). The surfaces (24, 40) are harder than the washer material and when the bolt (18) is tightened, points or edges on the surfaces: (24, 40) dig into the washer material.

Abstract: A golf club having a shaft (3) and a club head (2) which is connected to a shank portion (4) of the shaft at its heel end (31) so that it can be rotated around the axis of the shank portion. The configuration of the shank portion is such that the shaft axis and the shank axis intersect at about the bottom of the heel end of the club head so that rotating the club head around the shank axis causes the angle between the club face (30) and the shaft (3) to change.

Abstract: An adjustable head golf club has a selection ring (16) positioned with shank end ratchet teeth (19) in ratchet relationship to shank ratchet teeth (20) and with head end ratchet teeth (17) in ratchet relationship to head ratchet teeth (18). A fastener rod (4,10) is extended intermediate a club attachment base (11) on the back side (29) of the club head (1) and a shank attachment base (12) on a shank (2). A fastener head (44, 45, 46) of the fastener rod can be buttressed either against an inward side of the club attachment base or against an outward side of a shank attachment base, depending on design preferences. A plurality of shank end ratchet teeth and shank ratchet teeth is different from a plurality of head end ratchet teeth and head ratchet teeth.

Abstract: Process for preparing ultra-pure nitrogen containing less than 100 ppb (parts per billion) impurities, characterized in that at least the impurities consisting of carbon monoxide (CO) and/or hydrogen (H.sub.2) are removed by passing the gas from which at least one of these two components has to be removed, over a bed of particles including a metallic element namely copper (Cu) and/or ruthenium (Ru) and/or rhodium (Rh) and/or palladium (Pd) and/or osmium (Os) and/or iridium (Ir) and/or platinum (Pt) supported on a particulate support, by the technique of ion exchange and/or by the technique of impregnation. This technique enables to produce ultra-pure nitrogen by using it either with nitrogen obtained by distillation, or air to be distilled as an additional step for the removal of CO.sub.2 and H.sub.2 O. A device for carrying out the process constitutes another object of the invention.