GOLF CLUB HEAD

• US 20180250559A1
• Filed: 03/05/2018
• Published: 09/06/2018
• Est. Priority Date: 03/06/2017
• Status: Active Application

• Current Assignee: Sumitomo Rubber Industries Limited
• Original Assignee: Sumitomo Rubber Industries Limited
• Inventors: TSUNASHIMA, Hiromasa, MIZUTANI, Naruhiro, HASEGAWA, Hiroshi, ONUKI, Masahide
• Granted Patent: US 10,286,265 B2
• Time in Patent Office: Days
• 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 53/0437 with special crown configurations
• CPC Class Codes: A63B 53/0466 wood-type
• CPC Class Codes: A63B 60/52 with slits

Abstract

A golf club head 1 having a hollow (i) therein comprises a face portion 2 having a face 2a for striking a ball, a crown portion 3 forming the head top surface, and a sole portion 4 forming a bottom of the head. One of or each of the crown portion 3 and the sole portion 4 is provided with a plurality of grooves bent in the same direction.

Claims

1. A golf club head having a hollow therein and comprising:

a face portion having a face for striking a ball,

a crown portion forming a top surface of the head, and

a sole portion forming a bottom of the head,

wherein

one of or each of the crown portion and the sole portion is provided with a plurality of grooves bent in the same direction.

2. The golf club head according to claim 1, wherein

said a plurality of grooves are arranged concentrically.

3. The golf club head according to claim 1, wherein

said a plurality of grooves are curved convexly to the rear of the golf club head.

4. The golf club head according to claim 1, wherein

each of said a plurality of grooves has

a toe-side first end disposed on a face side,

a heel-side second end disposed on a face side and located on a heel side of the toe-side first end, and

a back side portion extending at a position on the back side of the toe-side first end and the heel-side second end.

5. The golf club head according to claim 1, wherein

said a plurality of grooves are arcuate.

6. The golf club head according to claim 5, wherein

said a plurality of grooves have radii of curvature in a range from 3 to 100 mm.

7. The golf club head according to claim 1, wherein

said a plurality of grooves are bent in polygonal lines.

8. The golf club head according to claim 1, wherein

the number of said a plurality of grooves is three or more.

9. The golf club head according to claim 8, wherein

said a plurality of grooves are arranged in a front-back direction of the head.

10. The golf club head according to claim 1, wherein

said a plurality of grooves are shifted toward a toe of the head.

11. The golf club head according to claim 1, wherein

said a plurality of grooves are shifted toward a heel of the head.

12. The golf club head according to claim 1, wherein

said a plurality of grooves are arranged in a heel side of the head and also in a toe side of the head.

13. A golf club head having a hollow therein and comprising:

a face portion having a face for striking a ball,

a crown portion forming a top surface of the head, and

a sole portion forming a bottom of the head,

wherein

one of or each of the crown portion and the sole portion is provided with a groove bent convexly to the rear of the golf club head.