Patent ID: 7291074
Filing Date: 2007-11-06
Classification: A63B

Abstract:
1. A wood-type golf club head comprising: an open-front hollow main body; and a face plate attached to the front of the main body, wherein the main body is formed by casting, and the face plate is formed by press molding, wherein the main body has a neck portion at the top end with an opening of a shaft inserting hole and a tubular part through which the shaft inserting hole penetrates, and the tubular part is extended into a hollow portion of the main body and terminates within the hollow portion so that an end of the shaft is kept away from an inner surface of the main body, said golf club head having a head volume V of not less than 300 cc, and a gravity point distance C (mm) satisfying the following condition: wherein in a state of the club head which is set on a horizontal plane HP such that a club shaft center line CL is inclined at its lie angle beta while keeping the club shaft center line CL on a vertical plane VP the gravity point distance C is defined as the shortest distance between the shaft center line CL and a projected gravity point Ga which is the gravity point G of the club head projected on the vertical plane VP in a cross section of the club head along the vertical plane VP the ratio (M/V) of the moment of inertia M (g sq.cm) of the club head around a vertical axis passing through the gravity point of the club head to the head volume V (cc) is in a range from 9.0 to 11.0, and a sweet spot height is in a range of from 25 to 40 mm.