Iron golf club head

• US 20050124437A1
• Filed: 10/25/2004
• Published: 06/09/2005
• Est. Priority Date: 12/05/2003
• Status: Active Grant

• Current Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Original Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Inventors: Imamoto, Yasunori
• Granted Patent: US 7,125,343 B2
• Time in Patent Office: Days
• US Class Current: 473/346
• CPC Class Codes: A63B 2209/02 with reinforcing fibres, e.g. carbon, polyamide fibres
• CPC Class Codes: A63B 2209/023 Long, oriented fibres, e.g. wound filaments, woven fabrics, mats
• CPC Class Codes: A63B 53/04 Heads
• CPC Class Codes: A63B 53/0416 Heads having an impact surface provided by a face insert
• CPC Class Codes: A63B 53/045 Strengthening ribs
• CPC Class Codes: A63B 53/0454 Strengthening ribs on the rear surface of the impact face plate
• CPC Class Codes: A63B 53/047 iron-type
• CPC Class Codes: A63B 53/0475 with one or more enclosed cavities
• CPC Class Codes: A63B 60/00 Details or accessories of golf clubs, bats, rackets or the like
• CPC Class Codes: A63B 60/54 with means for damping vibrations
• CPC Class Codes: B29C 49/44 for applying pressure through the walls of an inflated bag
• CPC Class Codes: B29C 70/44 using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
• CPC Class Codes: B29C 70/745 Filling cavities in the preformed part for joining B29C70/84
• CPC Class Codes: B29L 2031/5227 Clubs

Abstract

A recess portion is provided on a rear face of a head main body. A resin layer is bonded between ribs, of an innermost face. After an element assembly of the resin layer, an element assembly of the FRP body and a balloon are inserted into the recess portion, the iron golf club head is mounted in a mold, and a gas such as air is supplied into the balloon through an air opening inserted into an opening.

Claims

1. An iron golf club head comprising:

a main body provided with a recess portion behind a face portion;

an FRP body provided in the recess portion; and

an opening provided in a toe portion or a back portion of the golf club head, wherein

the FRP body has a hollow shape, and is balloon molded in the recess portion, and

the opening is closed with a lid member.

2. The iron golf club head according to claim 1, further comprising a plurality of ribs extending vertically on a back face of the face portion.

3. The iron golf club head according to claim 2, further comprising a resin layer disposed between the ribs.

4. The iron golf club head according to claim 3, wherein the resin layer is made of at least one of an FRP and elastomer layer.

5. The iron golf club head according to claim 3, wherein the resin layer has a higher specific gravity than the FRP body.

6. The iron golf club head according to claim 4, wherein the resin layer has a higher specific gravity than the FRP body.

7. The iron golf club head according to claim 3, wherein the resin layer is disposed between the main body and the FRP body.

8. The iron golf club head according to claim 4, wherein the resin layer is disposed between the main body and the FRP body.

9. The iron golf club head according to claim 5, wherein the resin layer is disposed between the main body and the FRP body.

10. The iron golf club head according to claim 6, wherein the resin layer is disposed between the main body and the FRP body.