Golf club head

• US 20090069113A1
• Filed: 08/26/2008
• Published: 03/12/2009
• 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
• Granted Patent: US 7,749,103 B2
• Time in Patent Office: Days
• 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 the 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 the peripheral part of the inner surface of the crown plate,

wherein

the average Wa of the width of the crown plate support existing in a foreside one-quarter zone of the top opening, the average Wc of the width of the crown plate support existing in a backside one-quarter zone of the top opening, and the average Wb of the 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

the ratio Wc/Wb is from 1.1 to 2.0.

3. The golf club head according to claim 1, wherein the following conditional expression (3) is further satisfied:

Wa>

Wc  

 

(3)

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

the ratio Wa/Wc is from 1.1 to 3.0.

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

in the plan view of the head, the center of gravity of the head is positioned within said mid two-quarter zone of the top opening.

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

the following conditional expression (3) is further satisfied:

Wa>

Wc  

 

(3)

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

the ratio Wa/Wc is from 1.1 to 3.0.