GOLF CLUB HEAD

• US 20150283434A1
• Filed: 10/10/2013
• Published: 10/08/2015
• Est. Priority Date: 10/17/2012
• Status: Abandoned Application

• Current Assignee: Sumitomo Rubber Industries Limited
• Original Assignee: Dunlop Sports Co. Ltd. (Sumitomo Rubber Industries Limited)
• Inventors: Ashino, Takeshi
• Application Number:
  US14/434,018
• Publication Number:
  US 20150283434A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A63B 2053/0491 with added weights, e.g. changeable, replaceable
• CPC Class Codes: A63B 53/04 Heads
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0412 Volume
• CPC Class Codes: A63B 53/0433 with special sole configurations
• CPC Class Codes: A63B 53/045 Strengthening ribs
• CPC Class Codes: A63B 53/0466 wood-type
• CPC Class Codes: A63B 60/002 Resonance frequency related characteristics
• CPC Class Codes: A63B 60/02 Ballast means for adjusting the centre of mass A63B60/24, A63B60/54 take precedence
• CPC Class Codes: A63B 60/54 with means for damping vibrations

Abstract

[Object] To provide a golf club head having various performances improved by a disposal of a rib.

[Solution] A head 2 includes a face 4, a crown 6 and a sole 8. A rib rb is formed on an inner surface of the sole 8. The rib rb has a sloped extension part ks1 extending to be closer to a face side as approaching from a heel side to a toe side. A center of gravity of the head is positioned on the heel side relative to a face center. The head 2 is hollow. Preferably, the sole 8 has a minimum-thickness region. Preferably, the rib rb has a thin reinforcing part rb2 positioned in the minimum-thickness region. The rib rb may extend linearly. The rib rb may extend curvedly. Preferably, a slope angle of the rib rb relative to a toe-heel direction is equal to or greater than 10° and equal to or less than 45°.

Claims

1. A hollow golf club head comprising:

a face;

a crown; and

a sole, wherein

a rib is formed on an inner surface of the sole,

the rib has a sloped extension part extending to be closer to a face side of the head as approaching from a heel side to a toe side, and

a center of gravity of the head is positioned on the heel side relative to a face center.

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

the sole has a minimum-thickness region, and

the rib has a thin reinforcing part positioned in the minimum-thickness region.

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

a first recess part is formed on an outer surface of the sole,

a recess part for a weight is formed inside the first recess part,

a weight member can be attached to the recess part for a weight, and

the rib has a recess-part-reverse-side rib part positioned at a reverse side of the first recess part on the inner surface of the sole.

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

a second recess part is formed on an outer surface of the sole,

the second recess part forms a protruding extension part on an inner surface side of the sole, and

the protruding extension part extends along the rib.

5. The golf club head according to claim 1, wherein the first recess part is continuous to the second recess part.

6. The golf club head according to claim 1 further comprising a side part, wherein

a toe side end of the rib does not extend up to the side part, and

a heel side end of the rib extends up to the side part.

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

the rib extends linearly in a plan view,

a slope angle of the rib relative to a toe-heel direction is equal to or greater than 10°

and equal to or less than 45°

.

8. The golf club head according to claim 1, wherein the rib extends curvedly so as to project toward a face side.

9. The golf club head according to claim 1, wherein the rib extends curvedly so as to project toward a back side.

10. The golf club head according to claim 1, wherein a length of the rib is equal to or greater than 50 mm and equal to or less than 150 mm.