Golf club head

• US 20060084525A1
• Filed: 10/19/2005
• Published: 04/20/2006
• Est. Priority Date: 10/20/2004
• Status: Active Grant

• Current Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Original Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Inventors: Yamagishi, Hisashi, Imamoto, Yasunori
• Granted Patent: US 7,530,901 B2
• Time in Patent Office: Days
• US Class Current: 473/345
• CPC Class Codes: A63B 2209/023 Long, oriented fibres, e.g. wound filaments, woven fabrics, mats
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0416 Heads having an impact surface provided by a face insert
• 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

Abstract

A hollow golf club head includes a fiber-reinforced-plastic body and a metal body. The fiber-reinforced-plastic body includes a main portion of a crown portion. The metal body includes a face portion, a front edge portion of the crown portion continuous with the face portion, and a central portion of a sole portion in a toe-heel direction. The front edge portion of the crown portion made of a metal defines a recess portion in an upper surface thereof. A front edge portion of the fiber-reinforce-resin body overlaps and is joined to the front edge portion of the crown portion made of the metal.

Claims

1. A hollow golf club head comprising:

a fiber-reinforced-plastic body including a main portion of a crown portion; and

a metal body including a face portion, a front edge portion of the crown portion continuous with the face portion, and a central portion of a sole portion in a toe-heel direction, wherein;

the front edge portion of the crown portion made of a metal defines a recess portion in an upper surface thereof, and

a front edge portion of the fiber-reinforce-resin body overlaps and is joined to the front edge portion of the crown portion made of the metal.

2. The golf club head according to claim 1, wherein a bonding resin is present in the recess portions.

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

the metal body further includes a front edge portion of a side portion continuous with the face portion,

the front edge portion of the side portion defines a recess portion in an outer surface thereof, and

the front edge portion of the fiber-reinforce-resin body overlaps and is joined to the front edge portion of the side portion made of the metal.

4. The golf club head according to claim 3, wherein the bonding resin is present in the recess portion of the crown portion and the recess portion of the side portion.

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

each of the recess portions of the metal crown portion is a substantially circular recessed hole, and

the front edge portion of the crown portion made of the metal defines a plurality of recess portions over the entire front edge portion of the crown portion.

6. The golf club head according to claim 5, wherein a depth of each recessed hole is in a range of 0.1 mm to 1 mm.

7. The golf club head according to claim 1, wherein the upper surface of the front edge portion of the crown portion is formed into a rough surface.

8. The golf club head according to claim 1, wherein a radius of curvature of the front edge portion of the crown portion from a toe side toward a heel side is in a range of 60 mm to 150 mm.