Abstract: A multi-material golf shaft having a butt portion joined to a tip portion and possessing unique relationships, including rigidity relationships, which provide beneficial performance characteristics.

Abstract: A pocket-sized, retractable golf club stand that can hold one or more golf clubs is described. The golf club stand includes a magnetic club holder that is attached to a telescoping shaft which is attached to a base including a slidable anchor. During use the anchor is extended and embedded into the ground, the telescoping pole is extended, and clubs are held against the device by the magnetic holder. Upon completion of use, the clubs are removed from the magnetic holder, the telescoping pole is retracted, and the anchor is slidably hidden away. In addition to holding golf clubs the device's anchor may be used for divot repair and the magnetic club holder may be used to secure ball markers.

Abstract: A golf club head with a high spring rate face assembly, particularly one designed for driver-type heads, including a body with a ball striking face and rearwardly extending depending sole and crown walls and a hosel, with a high spring rate annular spring seated against the rear surface of the face with a short spring height, where the spring has a high face force to deflection ratio, and is preloaded against the face.

Abstract: Some embodiments include a club head for adjusting vertical spin of a golf ball. Other embodiments of related systems and methods are also disclosed.

Abstract: A golf club includes a head; a shaft; and a grip. The head has a weight Wh of greater than or equal to 195 g. The golf club has a club length Lc of greater than or equal to 45.0 inches. The golf club has a club weight Wc of greater than or equal to 295 g. The golf club has a swing moment of inertia Isw of less than or equal to 5470×103 (g·cm2). The swing moment of inertia Isw (g·cm2) is calculated by the following formula (1): Isw=Wc×(Lg+40)2+Ic??(1), where Wc represents the club weight (g), Lg represents a distance (cm) in an axial direction between a butt end of the grip and a center of gravity of the golf club, and Ic represents a moment of inertia (g·cm2) of the golf club about the center of gravity of the golf club.

Abstract: A golf club head having a hosel, a hollow interior, and a support structure disposed within the hollow interior proximate a flange region 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 hosel support ring or support rod, and a composite crown affixed to the body to close the upper opening and define a hollow interior. The support structure reduces the stresses placed on, for example, the crown during hosel bending processes.

Abstract: A golf club head that is capable improving on the inertia properties of a golf club head all while also improving the Center of Gravity (CG) location is disclosed herein. More specifically, the golf club head in accordance with the present invention achieves a relative low Moment of Inertia (MOI) about the Z-axis (MOI-Z) as well as a relatively low MOI about the Shaft-axis (MOI-SA), all combined with a high MOI about the X and Y-axis (MOI-X and MOI-Y) and maintaining a consistently and relatively low CG location measured along a direction tangent to the hosel axis along the X-Y plane (CG-B).

Abstract: An iron-type golf club head for a golf club includes a body and a face joined to the body. The face includes a front surface including a ball striking surface, and a rear surface facing an interior surface of the body. Multiple independent depressions are formed in the rear surface toward the front surface. Each of the independent depressions is at least partially filled with a non-metallic material.

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

Abstract: Described are embodiments of golf club heads having an internal cavity and features that cause the golf club head to have an improved acoustic performance when striking a golf ball. Some embodiments include one or more weight tracks and/or weight ports formed in the sole for receiving adjustable weights. The golf club heads can include one or more internal ribs, thickened wall regions, and/or posts positioned within the cavity that increase the rigidity of the club head and improve the acoustic performance of the club head when striking a ball.

Abstract: A shaft includes a plurality of fiber reinforced layers. The fiber reinforced layers include a plurality of hoop layers and a plurality of straight layers. The straight layers include at least one full length straight layer. At least two of the hoop layers and at least two of the straight layers constitute an alternate lamination of the hoop layers and the straight layers. The hoop layers may include a first butt partial hoop layer and a second butt partial hoop layer that is longer in an axial direction than the first butt partial hoop layer. The first butt partial hoop layer may have a weight per unit area of greater than that of the second butt partial hoop layer.

Abstract: A system and methods of fitting golf clubs, and more particularly, the systems and methods related to wedge type golf clubs, having multiple sole configurations and/or bounce angles. More specifically, the present invention is directed to system and methods that enable a player to quantify the performance of the golf club's sole interaction with the ground and to determine the sole configuration and bounce angle that provides the most optimal shot performance.

Abstract: A golf club shaft includes a tip end, a butt end, a first anisotropic portion that is twisted in a first direction in conjunction with a bending of the golf club shaft at a circumferential bending position, and a second anisotropic portion that is twisted in a second direction in conjunction with the bending. The second anisotropic portion is located on a tip end side relative to the first anisotropic portion. The second direction is opposite to the first direction. In the shaft, the twist accompanied by the bending in the first anisotropic portion can be offset by the twist accompanied by the bending in the second anisotropic portion.

Abstract: A golf club includes a head; a shaft having a tip end and a butt end; a grip; and a weight member that is located in a butt end region having a distance from a butt end of the grip of less than or equal to 100 mm. The grip and the weight member constitute a grip-weight portion. The shaft, the grip, and the weight member constitute a shaft-grip-weight portion. The shaft has a weight Ws of less than or equal to 40 g. The shaft has a flex point ratio of less than or equal to 50%. The grip-weight portion has a weight W2 of greater than or equal to 40 g. A ratio W1/W3 of a weight W1 of the butt end region to a weight W3 of the shaft-grip-weight portion is greater than or equal to 0.40.

Abstract: A flexible elastomeric grip for the shaft of a golf club having an end cap with a cavity for receiving a sensor and/or counterweight. The cap has a durometer hardness equal to or greater than the tubular body portion of the grip and a flange sized to match the larger diameter of the body, with a sleeve engaging the inner periphery of the larger end of the tubular body. In one version of the cap, the sleeve portion is extended in length and has stiffening ribs on the outer surface of the sleeve; and, in another version, the sleeve is shorter and may also have stiffening ribs on the outer surface of the sleeve. In another version of the cap, fibrous material is disposed in the flange and sleeve to increase lateral stiffness without increasing durometer.

Abstract: A golf club includes a head; a shaft; a grip; and a weight member that is located in a butt end region. The grip and the weight member constitute a grip-weight portion. The shaft, the grip, and the weight member constitute a shaft-grip-weight portion. The golf club has a length of greater than or equal to 45.0 inches. The golf club has a weight of less than 295 g. The head has a weight of greater than or equal to 195 g. The grip-weight portion has a weight of greater than or equal to 40 g. W1/W3 is greater than or equal to 0.40, where W1 represents a weight (g) of the butt end region, and W3 represents a weight (g) of the shaft-grip-weight portion.

Abstract: A golf club includes a head; a shaft; a grip; and a weight member that is located in a butt end region. The grip and the weight member constitute a grip-weight portion. The shaft, the grip, and the weight member constitute a shaft-grip-weight portion. The head has a weight of greater than or equal to 195 g. The grip-weight portion has a weight of greater than or equal to 40 g. The shaft has a weight of less than or equal to 40 g. The golf club has a weight of greater than or equal to 275 g and less than or equal to 300 g. W1/W3 is greater than or equal to 0.40, where W1 represents a weight (g) of the butt end region, and W3 represents a weight (g) of the shaft-grip-weight portion.

Abstract: A length adjustable golf club includes a club head attached to a shaft at a lower end. A length adjusting kit includes a shaft insert that attaches to the shaft at an upper end. The shaft insert includes a coupling port that accepts one of an extension block or a grip connector. To provide length adjustments of the overall club length, one or more extension blocks may attached between the shaft insert and the grip connector. A grip assembly having a reinforcing sleeve connects to the grip connector and extends over the shaft and any extension blocks.

Abstract: A golf club includes a head; a shaft having a tip end and a butt end; a grip; and a weight member that is located in a butt end region having a distance from a butt end of the grip of 100 mm or less. The grip and the weight member constitute a grip-weight portion. The shaft, the grip, and the weight member constitute a shaft-grip-weight portion. The golf club has a weight of less than 295 g. The head has a weight of greater than or equal 195 g. The grip-weight portion has a weight of greater than or equal to 40 g. The head has a gravity center distance of greater than or equal to 44.5 mm. A ratio W1/W3 of a weight W1 (g) of the butt end region to a weight W3 (g) of the shaft-grip-weight portion is greater than or equal to 0.40.

Abstract: Provided is a golf shaft comprising an element tube made of steel, a plating layer formed on an outer periphery of the element tube, an outer layer covering the plating layer, an adhesive layer interposed between the plating layer and the outer layer to bond between the plating layer and the outer layer. The outer layer is formed of a fiber reinforced plastic having a matrix resin that is an epoxy resin, and the adhesive layer is an epoxy resin composition or a carbon nano tube resin composition, the epoxy resin composition comprising an epoxy resin and a mixed curing agent in which two or more kinds of amine-based curing agents are mixed, and the carbon nano tube resin composition comprising an epoxy resin and at least one kind of curing agents as well as dispersed carbon nano tubes.