Golf club and manufacturing method thereof

• US 20020123394A1
• Filed: 11/07/2001
• Published: 09/05/2002
• Est. Priority Date: 03/05/2001
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Endo Seisakusho
• Original Assignee: Kabushiki Kaisha Endo Seisakusho
• Inventors: Tsurumaki, Masaei
• Application Number:
  US10/045,455
• Publication Number:
  US 20020123394A1
• Time in Patent Office: Days
• US Class Current: 473/345
• CPC Class Codes: A63B 53/0458 with non-uniform 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

Abstract

A golf club whose position of the C.G. is easy to adjust, enabling a large-sized head. A shaft 7 is attached to a head 1 made by combining a plurality of metal shells 11, 12, 13, 14. The respective shells 11, 12, 14 are formed into a preset thickness such as the thickness “a” by a grinding process, using shot blasting S. Thus the reduction in weight is resulted by the grinding process, thus enabling the free distribution of the weight. As a result, it becomes easier to adjust the position of the C.G., realizing a golf club head with a larger volume.

Claims

1. A golf club comprising a head formed by combining a plurality of metal shells and a shaft attached to the head, wherein at least a part of said metal shells is formed into a certain thickness by a blast grinding process.

2. A golf club according to claim 1, wherein at least a partial portion of said metal shell is formed into a different thickness than that of the remainder thereof by subjecting at least a part of a certain surface thereof to the blast grinding process.

4. A golf club according to claim 1, wherein said head is formed by combining a face shell a crown shell a sole shell and a peripheral side shell.

5. A golf club according to claim 4, wherein said sole shell is formed integrally with said peripheral side shell.

3. A method of manufacturing a golf club comprising a head formed by combining a plurality of metal shells and a shaft attached to the head, which comprises the step of adjusting a thickness of at least a part of said metal shells by a blast grinding process.

6. A method for manufacturing a golf club according to claim 3, wherein said head is formed by combining a face shell a crown shell a sole shell and a peripheral side shell.

7. A method for manufacturing a golf club according to claim 6, wherein said sole shell is formed integrally with said peripheral side shell.