Golf club head

• US 7,326,472 B2
• Filed: 11/16/2004
• Issued: 02/05/2008
• Est. Priority Date: 05/16/2002
• Status: Expired due to Fees

• Current Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Original Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Inventors: Shimazaki, Hideo, Imamoto, Yasunori
• Primary Examiner(s): McNeil; Jennifer
• Assistant Examiner(s): Savage; Jason L.
• Application Number:
  US10/989,223
• Publication Number:
  US 20050090333A1
• Time in Patent Office: 1,176 Days
• Field of Search: None
• US Class Current: 428/682
• CPC Class Codes: A63B 2053/0491 with added weights, e.g. changeable, replaceable
• CPC Class Codes: A63B 2209/00 Characteristics of used materials
• CPC Class Codes: A63B 53/0433 with special sole configurations
• 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: Y10T 428/12493 Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
• CPC Class Codes: Y10T 428/12951 Fe-base component
• CPC Class Codes: Y10T 428/12958 Next to Fe-base component

Abstract

A head body of a golf club head has a hollow portion defined by an outer wall. An opening portion is provided in a part of the head body. A small tungsten alloy piece having a shape fittable to the opening portion so as to cover the opening portion is fixedly attached to the opening portion by welding. The golf club head defines the opening portion in a part of the metal head body and has the small tungsten alloy piece fitted and joined to the opening portion by welding so that the golf club head can be reduced in weight because of provision of the hollow portion. Since the small tungsten alloy piece is joined to the opening portion by welding, difficult plastic forming is not required particularly, and the weight can be adjusted easily and accurately.

Claims

1. A structure comprising:

a stainless steel member; and

a tungsten alloy member,

wherein the stainless steel member and the tungsten alloy member are welded to each other,

wherein the tungsten alloy member includes the following compositions based on the total weight of the tungsten alloy member;

tungsten in a range of 28 wt %-32 wt %;

iron in a range of 45 wt %-49 wt %;

nickel in a range of 15 wt %-17 wt %; and

copper in a range of 1 wt %-3 wt %; and

wherein the sum of amount of tungsten, iron, nickel, and copper in the tungsten alloy member is in a range of 93 wt % to 98 wt %.

2. The structure of claim 1, wherein the structure is configured to be used in a golf club head.

3. A structure comprising:

a stainless steel member; and

a tungsten alloy member,

wherein the stainless steel member and the tungsten alloy member are welded to each other,

wherein the tungsten alloy member includes the following compositions based on the total weight of the tungsten alloy member;

tungsten in a range of 25 wt % 32 wt %;

iron in a range of 43 wt % 49 wt %;

nickel in a range of 13 wt %-17 wt %; and

copper in a range of 1 wt %-3 wt %; and

wherein the sum of amount of tungsten, iron, nickel, and copper in the tungsten alloy member is in a range of 93 wt % to 98 wt %.

4. The structure of claim 3, wherein the structure is configured to be used in a golf club head.