Patent ID: 6645087
Filing Date: 2003-11-11
Classification: A63B

Abstract:
A metallic golf club head comprising:a face portion having a ball hitting face, the face portion comprising a main part having a substantially constant thickness T1, and a thinner part around the main portion having a thickness T2 less than the thickness T1, a crown portion, a sole portion, a cavity surrounded by the face portion, crown portion and sole portion at least, and a plurality of resonance controlling lines provided on an inner surface of each of the crown portion and the sole portion which inner surface faces to the cavity, the resonance controlling lines protruding from the inner surface and extending substantially normally to an inner surface of the face portion, and all of the resonance controlling lines extending in one direction, leaving space between front ends of the resonance controlling lines and the inner surface of the face portion so as to provide no substantial support for the inner surface of the face portion.