Wood-type golf club head

Details Wood-type golf club head Wood-type golf club head

2007-09-05

2010-12-28

Hunter, Alvin A (Department: 3711)

Games using tangible projectile

Golf

Club or club support

C473S349000

Reexamination Certificate

active

07857713

ABSTRACT:
A hollow wood-type golf club head1having a volume of 420 to 500 cm3and comprising face portion3, wherein the face portion3comprises a metallic material having a specific gravity of 4.30 to 4.60 and has a thickness of 1.5 to 4.0 mm, and in the standard state of head1, the X/Y ratio is 0.0070 or less in which X is the depth (mm) of the club head's center of gravity which is a horizontal length between the center of gravity and a sweet spot on face2in the front-rear direction of head1, and Y is the moment of inertia (g·cm2) of head1about the vertical axis passing through the center of gravity, and the intersection line of the face2with a horizontal plane including the sweet spot is convex toward the front of head1and has a radius of curvature of 330.2 to 457.2 mm.

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