Abstract: A golf club head comprising a plurality of center of gravity adjustment assemblies is disclosed herein. In some embodiments, the golf club head comprises a plurality of weight ports and a vertical center of gravity adjustment assembly. In other embodiments, the golf club head comprises two vertical center of gravity adjustment assemblies and one horizontal center of gravity adjustment assembly that allows weight to be shifted in a direction perpendicular to a face of the golf club head. In some embodiments, the horizontal center of gravity adjustment assembly may include a slidable weight, while in others it may include a flippable weight cartridge.

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, and a ball joint, wherein the ball joint is located either on the shaft sleeve or the hosel portion and fits within, and is rotatable along various axes within, a socket.

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: The present invention discloses an iron-type golf club head formed from multiple materials that increase torsional stiffness of the club and aid in sound performance. In particular, the iron-type golf club head includes a body having top, sole, heel, toe, and face portions, a rear cavity, and a rear flange extending upwards from the sole portion, and a composite cap comprising a plurality of ribs covering the rear cavity and forming an internal cavity. The ribs can extend from an interior surface to an exterior surface of the composite cap, and in one embodiment, at least one of the ribs extends along an interior surface of the composite cap and hooks over the rear flange.

Abstract: The present invention comprises a golf club head comprising a body having a crown, a sole, a front wall and a hosel, wherein the body defines a hollow interior. The golf club head further comprises a center of gravity adjustment assembly wherein the center of gravity adjustment assembly is positioned within the hollow interior of the body, and allows the center of gravity of the golf club head to be adjusted by at least 0.050 inch, preferably along a vertical axis.

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: A golf club comprising a hosel and a shaft that is fastened to the hosel at the heel-side of the club is disclosed herein. The golf club includes a wedge inserted into an opening on the heel-side of the hosel, which and retains the shaft within the hosel. In an alternative embodiment, a lever is inserted into an opening in the heel side of the hosel to retain the shaft within the hosel.

Abstract: A golf club head comprising a face, crown, sole, pivoting weight receptacle with a bore, and a weight cartridge sized to removably fit within the bore is disclosed herein. In particular, least one of the crown and the sole comprises a first weight port sized to releasably receive the pivoting weight receptacle, which extends into an interior cavity of the golf club head when the pivoting weight receptacle is fully engaged with the first weight port such that at least part of the pivoting weight receptacle is suspended within the interior cavity and does not make contact with any portion of the golf club head.

Abstract: The present invention comprises a golf club head comprising a body having a crown, a sole, a front wall and a hosel, wherein the body defines a hollow interior. The golf club head further comprises a center of gravity adjustment assembly wherein the center of gravity adjustment assembly is positioned within the hollow interior of the body, and allows the center of gravity of the golf club head to be adjusted by at least 0.050 inch, preferably along a vertical axis.

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 with a joint portion, a hosel portion, and a fitting piece, wherein the joint portion fits within the fitting piece and the fitting piece fits within the hosel portion.

Abstract: The present invention discloses an iron-type golf club head having features that permit adjustment to the principal moment of inertia angle, the center of gravity location, turf interaction, loft, and overall club forgiveness. In particular, the golf club head includes a rear cavity sized to receive a weight cartridge composed of one or more materials, the adjustment of which changes one or more of the mass properties of the golf club head and also changes the interaction of the golf club head with turf during play. The weight cartridge may comprise one or more high density materials, and may be located in or proximate the sole.

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 with a joint portion, a hosel portion, and a fitting piece, wherein the joint portion fits within the fitting piece and the fitting piece fits within the hosel portion.

Abstract: The present invention discloses an iron-type golf club head having features that permit adjustment to the principal moment of inertia angle, the center of gravity location, turf interaction, loft, and overall club forgiveness. In particular, the golf club head includes a rear cavity sized to receive a weight cartridge composed of one or more materials, the adjustment of which changes one or more of the mass properties of the golf club head and also changes the interaction of the golf club head with turf during play. The weight cartridge may comprise one or more high density materials, and may be located in or proximate the sole.

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: The present invention discloses an iron-type golf club head having features that permit adjustment to the principal moment of inertia angle, the center of gravity location, turf interaction, loft, and overall club forgiveness. In particular, the golf club head includes a rear cavity sized to receive a weight cartridge composed of one or more materials, the adjustment of which changes one or more of the mass properties of the golf club head and also changes the interaction of the golf club head with turf during play. The weight cartridge may comprise one or more high density materials, and may be located in or proximate the sole.

Abstract: The present invention comprises a golf club head comprising a body having a crown, a sole, a front will and a hosel, wherein the body defines a hollow interior. The golf club head further comprises a center of gravity height adjustment assembly wherein the center of gravity height adjustment assembly is positioned within the hollow interior of the body. The center of gravity of the golf club head can be adjusted approximately 0.050 inch and 0.100 inch.

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.