Golf club head

• US 20070129164A1
• Filed: 06/26/2006
• Published: 06/07/2007
• Est. Priority Date: 12/05/2005
• Status: Active Grant

• Current Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Original Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Inventors: Matsunaga, Hideo, Shimazaki, Hideo, Ban, Wataru
• Granted Patent: US 7,637,823 B2
• Time in Patent Office: Days
• US Class Current: 473/338
• CPC Class Codes: A63B 2053/0491 with added weights, e.g. changeable, replaceable
• CPC Class Codes: A63B 53/0433 with special sole configurations
• CPC Class Codes: A63B 53/0462 characterised by tapering thickness of the impact face plate
• CPC Class Codes: A63B 53/0466 wood-type
• 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

This invention provides a hollow golf club head including a fixing member which includes a shaft body formed with a threaded portion at one end, and a head portion at the other end of the shaft body, a viscoelastic body having an opening through which the shaft body extends, a recess portion formed in a circumferential wall of the golf club head and in which the viscoelastic body is disposed, and a screw hole formed in a bottom portion of the recess portion and threadably engages with the threaded portion. The viscoelastic body is fixed between the head portion and the bottom portion by threadably engaging the threaded portion with the screw hole.

Claims

1. A hollow golf club head comprising:

a fixing member having a shaft body formed with a threaded portion at one end, and a head portion at the other end of said shaft body;

a viscoelastic body having an opening through which said shaft body extends;

a recess portion formed in a circumferential wall of the golf club head and in which said viscoelastic body is disposed; and

a screw hole formed in a bottom portion of said recess portion and threadably engages with said threaded portion,

wherein said viscoelastic body is fixed between said head portion and said bottom portion by threadably engaging said threaded portion with said screw hole.

2. The head according to claim 1, wherein

said viscoelastic body is flat, and

the head further comprises an interposed member interposed between said viscoelastic body and said head portion and includes an opening through which said shaft body extends,

said interposed member including a flat surface which is in contact with said viscoelastic body and is the same shape as said viscoelastic body.

3. The head according to claim 1, wherein said recess portion is formed in a sole portion of the golf club head.

4. The head according to claim 1, wherein said recess portion is formed in a back-side side portion of the golf club head.

5. The head according to claim 1, wherein said head comprises one of a wood type golf club head and utility type golf club head.