Golf club head

• US 5,681,228 A
• Filed: 11/16/1995
• Issued: 10/28/1997
• Est. Priority Date: 11/16/1995
• Status: Expired due to Term

• Current Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Original Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Inventors: Imamoto, Yasunori, Mikame, Daisuke, Ezaki, Hiroshi, Shimasaki, Hirato
• Primary Examiner(s): Passaniti, Sebastiano
• Application Number:
  US08/558,450
• Time in Patent Office: 712 Days
• Field of Search: 273/167 J, 273/175, 273/167 F, 273/169, 273/167 R, 473/324, 473/329, 473/330, 473/334, 473/341, 473/343, 473/344, 473/345, 473/346, 473/349, 473/280, 473/291, 473/290, 473/292
• US Class Current: 473/330
• CPC Class Codes: A63B 53/04 Heads
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0466 wood-type

Abstract

A golf club head has a gravity depth of 27 mm or greater and a convexed face with bulge and roll radii each equal to 9 inches or less. In an embodiment, a club head has a gravity depth of 27 mm, a bulge radius in the range of 6 to 8 inches and a roll radius of 7 to 9 inches. In another embodiment, a club head has a gravity depth of 30 to 35 mm, a bulge radius in the range of 6 to 8 inches and a roll radius of 7 to 9 inches.

Claims

1. A golf club head comprising:

a head body having a convexed front face defined by a bulge arc extending from toe to heel of the head body and a roll arc extending from top to sole of the club head;

said head body having a gravity depth defined by a shortest distance between a center of gravity of the head body and said convexed front face, and said gravity depth (Zg) being 27 mm or more;

said bulge arc having a radius (R1) of 6 to 8 inches in a horizontal plane; and

said roll arc having a radius (R2) of 7 to 9 inches in the vertical plane.

2. A golf club head as set forth in claim 1 wherein said gravity depth (Zg) is 30 to 35 min.

3. A golf club head comprising:

a head body having a convexed front face defined by a bulge arc extending from toe to heel of the head body and a roll arc extending from top to sole of the club head;

said head body having a gravity depth defined by a shortest distance between a center of gravity of the head body and said convexed front face, and said gravity depth (Zg) of about 35 mm;

said bulge arc having a radius (R1) of about 6 inches in a horizontal plane; and

said roll arc having a radius (R2) of about 7 inches in the vertical plane.

4. A golf club head comprising:

a head body having a convexed front face defined by a bulge arc extending from toe to heel of the head body and a roll arc extending from top to sole of the club head;

said head body having a gravity depth defined by a shortest distance between a center of gravity of the head body and said convexed front face, and said gravity depth (Zg) of about 30 mm;

said bulge arc having a radius (R1) of about 7 inches in a horizontal plane; and

said roll arc having a radius (R2) of about 8 inches in the vertical plane.