Golf club

• US 20070105641A1
• Filed: 12/29/2005
• Published: 05/10/2007
• Est. Priority Date: 11/08/2005
• Status: Active Grant

• Current Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Original Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Inventors: Ban, Wataru
• Granted Patent: US 7,473,184 B2
• Time in Patent Office: Days
• US Class Current: 473/292
• CPC Class Codes: A63B 53/00 Golf clubs
• CPC Class Codes: A63B 53/0466 wood-type
• CPC Class Codes: A63B 60/00 Details or accessories of golf clubs, bats, rackets or the like

Abstract

This invention provides a wood type golf club including a shaft, a grip at one end of the shaft, and a head at the other end of the shaft, wherein a mass m (g) of the golf club and a length L (cm) from a grip side end of the golf club to a barycentric position of the golf club satisfy m×L²>2.280×10⁶ (g·cm²) and m×L²>140×m×L−(5.95×m−417)×10³.

Claims

1. A wood type golf club comprising a shaft, a grip at one end of said shaft, and a head at the other end of said shaft,

wherein a mass m (g) of the golf club and a length L (cm) from a grip side end of the golf club to a barycentric position of the golf club satisfy

m×

L²>

2.280×

10⁶ (g·

cm²) and
m×

L²>

140×

m×

L−

(5.95×

m−

417)×

10³.

2. The golf club according to claim 1, wherein the mass m is within a range of 260 (g) to 300 (g) (both inclusive).

3. The golf club according to claim 1, wherein

a total length of the golf club is within a range of 41 inches to 50 inches (both inclusive), and

a loft angle of a face of said head is not more than 25 degrees.

4. The golf club according to claim 1, wherein a club balance of the golf club is C7 to D5 according to the 14-inch method.

5. The golf club according to claim 1, wherein the mass of said grip is not more than 40 (g).

6. The golf club according to claim 1, wherein

the mass of said shaft is not more than 50 (g), and

the barycentric position of said shaft is within a range of 50% a total length of said shaft from a head side end of said shaft.