GOLF CLUB HEAD

• US 20080032814A1
• Filed: 12/04/2006
• Published: 02/07/2008
• Est. Priority Date: 08/07/2006
• Status: Abandoned Application

• Current Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Original Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Inventors: Ban, Wataru
• Application Number:
  US11/566,407
• Publication Number:
  US 20080032814A1
• Time in Patent Office: Days
• US Class Current: 473/330
• CPC Class Codes: A63B 53/0445 Details of grooves or the like on the impact surface
• CPC Class Codes: A63B 53/0466 wood-type
• CPC Class Codes: A63B 53/047 iron-type

Abstract

This invention provides a golf club head having a plurality of grooves formed in a face thereof. Edges of the groove are rounded with a radius of not more than 0.2 mm. A width W (mm) of the groove measured with the rounded edge being included, a width Ws (mm) between the grooves adjacent to one another, a width Wr (mm) of the groove measured based on the 30 degrees measurement rule and a cross section area S (mm²) of the groove satisfy the following expressions; W/Ws×100≧35(%), S/(Ws×0.5)×100≅70(%).

Claims

1. A golf club head having a plurality of grooves formed on a face thereof, wherein

edges of said groove are rounded with a radius of not more than 0.2 mm, and

a width W (mm) of said groove measured with said rounded edge being included, a width Ws (mm) between said grooves adjacent to one another, a width Wr (mm) of said groove measured based on the 30 degrees measurement rule and a cross section area S (mm²) of said groove satisfy the following expressions:

W/Ws×

100≧

35(%)

S/(Ws×

0.5)×

100≧

70(%).

2. The golf club head according to claim 1, wherein

said width Wr is equal to or more than 0.6 (mm) and not more than 0.9 (mm).