Golf club head

• US 7,749,103 B2
• Filed: 08/26/2008
• Issued: 07/06/2010
• Est. Priority Date: 09/06/2007
• Status: Active Grant

• Current Assignee: Sumitomo Rubber Industries Limited
• Original Assignee: SRI Sports Limited (Sumitomo Rubber Industries Limited)
• Inventors: Nakano, Takashi
• Primary Examiner(s): Hunter; Alvin A
• Application Number:
  US12/230,227
• Publication Number:
  US 20090069113A1
• Time in Patent Office: 679 Days
• Field of Search: 473324-350
• US Class Current: 473/345
• CPC Class Codes: A63B 2209/00 Characteristics of used materials
• 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 53/0437 with special crown 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 53/047 iron-type
• CPC Class Codes: A63B 53/0487 for putters A63B53/065 takes precedence
• CPC Class Codes: A63B 60/00 Details or accessories of golf clubs, bats, rackets or the like

Abstract

A golf club head having a hollow structure comprising a head main body provided with a top opening and a crown plate fitted in the top opening is disclosed. The head main body is provided with a support for the crown plate extending along the edge of the top opening and protruding into the top opening with a variable width from the edge of the top opening. the average Wa of the width of the crown plate support existing in the foreside one-quarter zone of the top opening, the average Wc of the width of the crown plate support existing in the backside one-quarter zone of the top opening, and the average Wb of the width of the crown plate support existing in the mid two-quarter zone of the top opening satisfy (1) Wa>Wb, and (2) Wc>Wb.

Claims

1. A golf club head having a hollow structure comprising:

a head main body provided with a top opening in a crown portion and

a crown plate fitted in the top opening so as to close the top opening, wherein

the head main body is provided with a crown plate support, the crown plate support extending along an edge of the top opening and protruding into the top opening with a variable width from the edge of the top opening so as to support a peripheral part of an inner surface of the crown plate, wherein

an average Wa of a width of the crown plate support existing in a foreside one-quarter zone of the top opening, an average Wc of a width of the crown plate support existing in a backside one-quarter zone of the top opening, and an average Wb of a width of the crown plate support existing in a mid two-quarter zone of the top opening satisfy the following conditional expressions (1) and (2);

Wa>

Wb 

 

(1)

Wc>

Wb. 

 

(2)

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

the ratio Wa/Wb is from 1.1 to 2.0, and

a ratio Wc/Wb is from 1.1 to 2.0.

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

the following conditional expression (3) is further satisfied:

Wa>

Wc. 

 

(3)

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

a ratio Wa/Wc is from 1.1 to 3.0.

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

the following conditional expression (3) is further satisfied:

Wa>

Wc. 

 

(3)

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

a ratio Wa/Wc is from 1.1 to 3.0.

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

in a plan view of the head, a center of gravity of the head is positioned within said mid two-quater zone of the tope opening.