Golf club set

• US 6,780,123 B2
• Filed: 03/13/2003
• Issued: 08/24/2004
• Est. Priority Date: 03/14/2002
• Status: Expired due to Fees

• Current Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Original Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Inventors: Hasebe, Yu
• Primary Examiner(s): Blau, Stephen
• Application Number:
  US10/386,683
• Publication Number:
  US 20030176232A1
• Time in Patent Office: 530 Days
• Field of Search: 473/290-291, 473/345, 473/349, 473/346
• US Class Current: 473/291
• CPC Class Codes: A63B 53/005 Club sets
• CPC Class Codes: A63B 53/04 Heads
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/045 Strengthening ribs
• CPC Class Codes: A63B 53/0454 Strengthening ribs on the rear surface of the impact face plate
• CPC Class Codes: A63B 53/0458 with non-uniform thickness of the impact face plate
• CPC Class Codes: A63B 53/047 iron-type
• CPC Class Codes: A63B 53/0475 with one or more enclosed cavities
• CPC Class Codes: A63B 60/00 Details or accessories of golf clubs, bats, rackets or the like
• CPC Class Codes: A63B 60/02 Ballast means for adjusting the centre of mass A63B60/24, A63B60/54 take precedence

Abstract

As the club number increases so that the loft angle is larger, the center-of-gravity height HG of each head becomes larger, and the center-of-gravity depth ZG thereof becomes smaller. Each head is hollow, and a face portion becomes thicker in its lower portion. The back bottom thickness T is smaller in an iron shorter in club length.

Claims

1. A golf club set comprising:

a plurality of iron-type golf clubs different in club length, each golf club having a head whose loft angle increases step by step as club length thereof becomes shorter step by step,

wherein as the loft angle of the golf club head of each golf club increases, center-of-gravity height HG projected on a face surface of the golf club head becomes larger, center-of-gravity depth ZG of the golf club head becomes shallower, and center-of-gravity height HGR of the golf club head of each golf club becomes lower.

2. The golf club set according to claim 1, wherein sole width S of each golf club head is in a range of 15 mm to 20 mm.

3. The golf club set according to claim 1, wherein the center-of-gravity depth ZG of each golf club head is in a range of 4.3 mm to 7 mm.

4. The golf club set according to claim 1, wherein center-of-gravity height HGR of each golf club head is not higher than 17.7 mm.

5. A golf club set comprising:

a plurality of iron-type golf clubs different in club length, each golf club having a head whose loft angle increases step by step as club length thereof becomes shorter step by step,

wherein each of golf club heads includes a hollow portion; and

wherein as the loft angle of the golf club head of each golf club increases, center-of-gravity height HG projected on a face surface of the golf club head becomes larger, center-of-gravity depth ZG of the golf club head becomes shallower, and center-of-gravity height HGR of the golf club head of each golf club becomes lower.

6. The golf club set according to claim 5, wherein sole width S of each golf club head is in a range of 15 mm to 20 mm.

7. The golf club set according to claim 5, wherein the center-of-gravity depth ZG of each golf club head is in a range of 4.3 mm to 7 mm.

8. The golf club set according to claim 5, wherein center-of-gravity height HGR of each golf club head is not higher than 17.7 mm.