GOLF CLUB

• US 20080234065A1
• Filed: 05/21/2008
• Published: 09/25/2008
• 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 7,568,981 B2
• Time in Patent Office: Days
• US Class Current: 473/289
• 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×L=2.55×104 (g·cm) and m×L²=2.322×106 (g·cm²), and a barycentric position of the shaft is at 48.3% a total length of the shaft from a head side end of the shaft.

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×

L=2.55×

10⁴ (g·

cm) and

m×

L=2.322×

10⁶ (g·

cm²), and

a barycentric position of said shaft is at 48.3% a total length of said shaft from a head side end of said shaft.

2. The golf club according to claim 1, wherein

the mass m is 281.0 (g),

the length L (cm) is 90.9 (cm),

a loft angle of a face of said head is 11.0 degrees,

a mass of said grip is 38.0 (g), and

a mass of said shaft is 48.3 (g).