Golf club head

• US 6,340,337 B2
• Filed: 03/13/2001
• Issued: 01/22/2002
• Est. Priority Date: 01/30/1998
• Status: Expired due to Term

• Current Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Original Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Inventors: Mikame, Daisuke, Imamoto, Yasunori, Kubota, Makoto, Shimasaki, Hirato, Hasebe, Yuu
• Primary Examiner(s): Ricci, John A.
• Application Number:
  US09/804,195
• Publication Number:
  US 20010009873A1
• Time in Patent Office: 315 Days
• Field of Search: 473/334, 473/340, 473/341, 473/345, 473/349
• US Class Current: 473/349
• CPC Class Codes: A63B 2053/0491 with added weights, e.g. changeable, replaceable
• CPC Class Codes: A63B 2209/00 Characteristics of used materials
• CPC Class Codes: A63B 53/04 Heads
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0433 with special sole configurations
• 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

Abstract

A golf club head having a hollow construction, including a bar-like gravity adjusting piece (4) which extends longitudinally from a toe (7) towards a heel (8), or vice versa, of the head and is secured directly on an inner surface of a sole portion (2) in a position nearer to a front face (3) or wherein a forward half area (F) of the sole portion (2) as viewed from above, that is nearer to a face member (3′) of the head, has a thickness two or more times greater in at least a portion thereof than an average thickness of a rearward half area (R) of the sole portion, that is nearer to a back side (10).

Claims

1. A golf club head of 250 cc or more in volume and having a hollow construction, in which an arcuate length (l₁) from a front edge of a crown portion of the head to a front edge of a sole portion, a circumferential length (l₂) from the crown front edge through the back side to the sole front edge, and a gravity depth (D) of the head in a cross section of the head in the direction of the head width at least in a sweet area of a front face, are in a relationship of (l₁/l₂)×

D≦

100 in the cross section.

2. The golf club head as set forth in claim 1, wherein there is formed on a portion of the cross section that will be the sole portion of the head a generally horizontal surface of 50 mm or less in width measured from a leading edge of the head that will be placed on the ground during addressing.