Wood golf club head

• US 5,092,599 A
• Filed: 04/17/1990
• Issued: 03/03/1992
• Est. Priority Date: 04/20/1989
• Status: Expired due to Fees

• Current Assignee: Yokohama Rubber Company Limited
• Original Assignee: Yokohama Rubber Company Limited
• Inventors: Nishimoto, Tatsuo, Okumoto, Takaharu
• Primary Examiner(s): Coven, Edward M.
• Assistant Examiner(s): Passaniti, Sebastiano
• Application Number:
  US07/510,242
• Time in Patent Office: 686 Days
• Field of Search: 273/167 E, 273/164, 273/167 R, 273/167 D, 273/167-175, 273/183 D, 273/193 R, 273/186 R, D21/214
• US Class Current: 473/327
• CPC Class Codes: A63B 2225/01 Special aerodynamic features, e.g. airfoil shapes, wings or air passages
• CPC Class Codes: A63B 53/04 Heads
• CPC Class Codes: A63B 53/0437 with special crown configurations
• CPC Class Codes: A63B 53/0441 with visual indicators for aligning the golf club
• CPC Class Codes: A63B 53/0466 wood-type
• CPC Class Codes: A63B 60/00 Details or accessories of golf clubs, bats, rackets or the like
• CPC Class Codes: A63B 60/52 with slits

Abstract

A wood golf club head equipped with steps which extend transversely on an upper surface of the head or a single large dimple of specific dimensions and location that extends over the rear portion of the upper surface of the club head.

Claims

1. A wood golf club head comprising:

a face for hitting a ball on a front surface of said wood golf club head;

a sole surface extending rearwardly from a lower edge of said face;

an upper surface extending rearwardly from an upper edge of said face and having a convex curved shape with an apex and an exposed single dimple spread out over a rear portion of the upper surface of the head, said dimple beginning at a point from 10 to 20 mm rearwardly from the apex of said curved upper surface, having a depth from said upper surface of from 0.5 to 1.5 mm and extending rearwardly at least over an area equivalent to the area of a circle having a diameter equal to the distance from said beginning point to a point adjacent a rearmost edge of said upper surface.

2. The wood golf club head of claim 1, wherein the dimple forms a circle.

3. The wood golf club head of claim 1, wherein the dimple has an elliptical shape having a front edge extending generally parallel to the upper edge of the face and extending over most of the rear portion of the upper surface of the club head rearwardly of said front edge of the dimple.