Golf club head

• US 20070129161A1
• Filed: 06/20/2006
• Published: 06/07/2007
• Est. Priority Date: 12/05/2005
• Status: Abandoned Application

• Current Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Original Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Inventors: Matsunaga, Hideo, Shimazaki, Hideo, Ban, Wataru
• Application Number:
  US11/455,739
• Publication Number:
  US 20070129161A1
• Time in Patent Office: Days
• US Class Current: 473/332
• CPC Class Codes: A63B 2209/00 Characteristics of used materials
• 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 53/0462 characterised by tapering thickness of the impact face plate
• CPC Class Codes: A63B 53/0466 wood-type
• CPC Class Codes: A63B 60/54 with means for damping vibrations

Abstract

This invention provides a hollow golf club head having a viscoelastic body, wherein the viscoelastic body is made by mixing a plurality of types of viscoelastic materials with loss coefficients the temperature dependences of which are different.

Claims

1. A hollow golf club head having a viscoelastic body, wherein said viscoelastic body is made by mixing a plurality of types of viscoelastic materials with loss coefficients temperature dependences of which are different.

2. The head according to claim 1, wherein peak value temperatures of the loss coefficients of the plurality of types of viscoelastic materials are different from each other.

3. The head according to claim 1, wherein the plurality of types of viscoelastic materials include two types of viscoelastic materials whose peak value temperatures of loss coefficients have a difference of not less than 15°

C.

4. The head according to claim 1, wherein the plurality of types of viscoelastic materials include a viscoelastic material with a loss coefficient a peak value temperature of which is less than −

30°

C. and a viscoelastic material with a loss coefficient a peak value temperature of which is not less than −

30°

C.

5. The head according to claim 1, wherein the loss coefficient of said viscoelastic body is not less than 0.3 in a range from −

40°

C. (inclusive) to −

10°

C. (inclusive).

6. The head according to claim 1, wherein said viscoelastic body is disposed in a sole portion of the golf club head.

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