Golf club head

• US 7,815,521 B2
• Filed: 12/01/2006
• Issued: 10/19/2010
• Est. Priority Date: 12/01/2006
• Status: Expired due to Fees

• Current Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Original Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Inventors: Ban, Wataru, Nguyen, Vinh-Duy Thai
• Primary Examiner(s): Hunter; Alvin A
• Application Number:
  US11/565,868
• Publication Number:
  US 20080132351A1
• Time in Patent Office: 1,418 Days
• Field of Search: 473324-350
• US Class Current: 473/330
• CPC Class Codes: A63B 53/04 Heads
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0445 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
• CPC Class Codes: A63B 60/00 Details or accessories of golf clubs, bats, rackets or the like

Abstract

The present invention provides a golf club head comprising, a face, a plurality of score line grooves formed in the face, traces formed in the face by milling; and a pair of side surfaces of the score line groove including a first surface that is contiguous with the face and a second surface that is contiguous with the first surface in the depth direction of the score line groove. A first angle that is formed by each first surface of the pair of side surfaces is larger than a second angle that is formed by each second surface of the pair of surfaces. The face in which the traces are formed has the arithmetic mean deviation of the profile (Ra) of not less than 4.00 μm.

Claims

1. A golf club head, comprising:

a face;

a plurality of score line grooves formed in said face, each score line groove including a pair of side surfaces; and

traces formed in said face by milling,

wherein each of said side surface includes a first surface at a face side of said score line groove and a second surface at a bottom side of said score line groove,

wherein a first angle that is formed between each first surface of the pair of side surfaces is larger than a second angle that is formed between each second surface of the pair of side surfaces,

wherein an arithmetic mean deviation of a profile of said face in which said traces are formed is not less than 4.00 μ

m,

wherein said traces are a plurality of striations which do not intersect with each other on said face, and

wherein an angle formed by an arrangement direction of the plurality of striations and said score line groove is between 40 degrees and 70 degrees, inclusive, as viewed clockwise from a toe side end of said score line groove.

2. The golf club head according to claim 1, wherein each striation forms a circular arc, and

wherein the arrangement direction is a direction that intersects the center of the circular arc of each striation,

3. The golf club head according to claim 2, wherein said striations are the only circular arcs on said face.