Abstract: A golf club head with a front wall, a rear wall and a reinforced crown includes ribs in the crown that are spaced more closely together near the front wall than near the rear wall. Preferably, the ribs radiate from a point in space located forward of the front wall. This arrangement of ribs significantly increases the fundamental structural frequency of the club head and significantly reduces the peak stress in the crown of the club head when compared with ribs extending perpendicular to the front wall and parallel to each other.

Abstract: A measurement tool for determining at least one of the loft angle or the lie angle of a golf club. The measurement tool includes a golf club head support structure having a mating surface and at least one beveled support element. The gauge also has a clamping tool capable securing the golf club head to the golf club head support structure. The clamping tool may include a pushing element and a mating element. The mating element has a jaw for applying a lateral force to the golf club head to secure it to the golf club support structure and a fastening plate for applying a vertical force to the golf club head to secure it to the golf club support structure. A gauge capable of indicating at least one of the loft angle or the lie angle of the golf club is positioned adjacent to the golf club head support structure.

Abstract: A golf club head includes a heel end, a toe end, a front wall arranged for impacting a golf ball, and a crown extending between the heel and toe ends. The crown has a front portion and a rear portion. A sole extends between the heel and toe ends and extends between the front wall and the crown rear portion. The sole includes a primary portion and a relief portion. The sole relief portion extends rearwardly away from the front wall and upwardly toward the crown rear portion when the sole primary portion is positioned on a substantially horizontal surface. The sole relief portion may vary in thickness and may include a weight pad. The golf club head may have a hollow interior cavity with the crown curving inwardly toward the cavity between its front and rear portions.

Abstract: A golf putter head includes a face arranged for impacting a golf ball. The face has a heel end, a toe end, and a middle section disposed between the heel and toe ends. A rear mass is located substantially rearwardly of the face, and a pair of arms extend rearwardly from the face toward the rear mass. Portions of the heel and toe ends of the face, the arms and the rear mass are included in a bottom component. Other portions of the heel and toe ends of the face and the middle section of the face are included in a top component. The bottom component is made of high density material such as metal while the top component is made of low density material such as polymer in order to provide the putter head with a low center of gravity.

Abstract: A golf club head and a method of tuning the golf club head. The golf club head includes a body having a front surface, a back surface, a heel end, a toe end, a sole extending between the lower portions of the heel and the toe ends, a top portion extending between the upper portions of the heel and toe ends, and a cavity. One or more magnets are mounted in the cavity such that their distance into the cavity can be adjusted. A detachable face plate having one or more magnets attached to a back surface of the detachable face plate is slidably mated with guides extending from the body. At least two of the magnets are positioned such that the north pole of the magnet in the cavity faces the north pole of a magnet attached to the back surface of the detachable face plate. A repulsive force between the north poles pushes the detachable face plate away from the body and into a stop coupled to the body.

Abstract: A golf club head includes a hollow body having a front wall, a crown and a sole. The crown has a thickness dimension measured between its inner and outer surfaces. An outer edge of the crown extends in a generally arcuate path between heel and toe ends of the hollow body. A plurality of thin regions in the crown is arranged in a matrix pattern. The plurality of thin regions includes a first row of thin regions disposed adjacent the outer edge of the crown and a second row of thin regions disposed inwardly of the first row of thin regions. The crown thickness dimension in the plurality of thin regions is reduced when compared with the crown thickness dimension in other regions of the crown.

Abstract: A golf club head includes a body and ball alignment indicia that protrudes forwardly of the front surface of the body. A transparent plate covers the ball alignment indicia and has a front face arranged for impacting a golf ball. A flange on the transparent plate is received in a recess in the body thereby forming a mechanical interlock between the transparent plate and the body. The ball alignment indicia has a partial spheroid shape and is located intermediate heel and toe ends of the body.

Abstract: A golf club head with a front wall, a rear wall and a reinforced crown includes ribs in the crown that are spaced more closely together near the front wall than near the rear wall. Preferably, the ribs radiate from a point in space located forward of the front wall. This arrangement of ribs significantly increases the fundamental structural frequency of the club head and significantly reduces the peak stress in the crown of the club head when compared with ribs extending perpendicular to the front wall and parallel to each other.

Abstract: A weight adjustment member may be mounted in a tuning port in a golf club head and secured therein using adhesive. The weight adjustment member includes a lip which prevents excess adhesive from escaping the tuning port and hides adhesive that might otherwise be visible between the weight adjustment member and the tuning port. Locating devices that mate with each other are included in the tuning port and on the weight adjustment member. A method of mounting the weight adjustment member in the tuning port of a golf club head is also provided.

Abstract: A golf club head includes a face insert that comprises an insert core made of a relatively hard (high durometer) durable polymer material that is surrounded on at least its rear and side surfaces by an insert shell made of a second softer (lower durometer) polymer material. The insert shell allows the harder insert core to “float” within a cavity in the club head while being surrounded on all sides by the softer insert shell. This arrangement of the insert core and the insert shell thus provides the advantages of a durable impact surface for desirable acoustic feedback while at the same time resulting in desirable feel due to the softer insert shell surrounding the harder insert core.

Abstract: A golf club head is formed with a crown having an aperture with an arcuate rear edge and a forward edge that is substantially parallel to the striking face. The aperture is transected by an arcuate rib that extends from a region proximal the heel end of the crown to a region proximal the toe end of the crown and is concave toward the striking face. A pair of linear ribs extend radially outward from the arcuate rib to join the arcuate rib to a perimeter region of the crown. Openings formed in the aperture by the ribs are filled with an organic-composite material such as graphite epoxy.

Abstract: The present invention provides an iron-type golf club head comprising a primary cavity that is approximately parallel to the ground when the club head is resting at normal address. A secondary cavity, positioned within the primary cavity, has a bottom wall that is approximately parallel to the club face and is positioned above the club head sole. An interior wall that forms the secondary cavity is uniform in height while increasing in width in a bottom segment thereof.