Putter head

• US 8,287,401 B2
• Filed: 10/31/2007
• Issued: 10/16/2012
• Est. Priority Date: 11/28/2006
• Status: Expired due to Fees

• Current Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Original Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Inventors: Tateno, Atsuo, Ishikawa, Tatsuya, Ban, Wataru, Sato, Fumiaki
• Primary Examiner(s): HUNTER, ALVIN A
• Application Number:
  US11/930,887
• Publication Number:
  US 20080125241A1
• Time in Patent Office: 1,812 Days
• Field of Search: 473324-350
• US Class Current: 473/331
• 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 53/042 the face insert consisting of a material different from that of the head
• CPC Class Codes: A63B 53/0445 Details of grooves or the like on the impact surface
• CPC Class Codes: A63B 53/0487 for putters A63B53/065 takes precedence

Abstract

A putter head includes: a face; a first group of grooves which are mutually-parallel grooves; and a second group of grooves which differ in depth from the first group of grooves, wherein the face includes the first group of grooves and the second group of grooves.

Claims

1. A golf club comprising:

a putter head comprising;

a face;

a first group of grooves which are mutually-parallel grooves; and

a second group of grooves which differ in depth from the first group of grooves,

wherein the face includes the first group of grooves and the second group of grooves, and

wherein a ratio W/S between a width W (mm) of grooves of the first group and a pitch S (mm) between the grooves of the first group ranges from 0.5 to 2.0;

wherein the face is formed from an insert material which differs from a material of a main body; and

a second insert material is made of a synthetic resin having Shore A hardness falling within a range from 90 to 98.

2. The golf club according to claim 1, wherein the face has a loft angle between 2°

and 5°

.

3. The golf club according to claim 1, wherein the insert material is fixed by an adhesive.

4. The golf club according to claim 1, wherein the insert material is fixed by at least one of fixing techniques of caulking, welding, and brazing.

5. The golf club according to claim 1, further comprising a second insert material fitted into a recess of the insert material so that second insert material is sealed by the insert material and the main body.

6. The golf club according to claim 1, wherein the insert material has a rectangular shape.

7. A golf club comprising:

a putter head comprising;

a face;

a first group of grooves which are mutually-parallel grooves; and

a second group of grooves which differ in depth from the first group of grooves,

wherein the face includes the first group of grooves and the second group of grooves, and

wherein a ratio W/S between a width W (mm) of grooves of the first group and a pitch S (mm) between the grooves of the first group ranges from 0.5 to 2.0;

wherein the face is formed from an insert material which differs from a material of a main body; and

a second insert material is made of a rubber having Shore A hardness falling within a range from 20 to 30.

8. The golf club according to claim 7, wherein the face has a loft angle of between 2°

and 5°

.

9. The golf club according to claim 7, wherein the insert material is fixed by an adhesive.

10. The golf club according to claim 7, wherein the insert material is fixed by at least one of fixing techniques of caulking, welding, and brazing.

11. The golf club according to claim 7, further comprising a second insert material fitted into a recess of the insert material so that second insert material is sealed by the insert material and the main body.

12. The golf club according to claim 7, wherein the insert material has a rectangular shape.