Golf club head

Patent metadata

Field	Value
Publication number	US-9149692-B2
Application number	US-201313872533-A
Country	US
Kind code	B2
Filing date	Apr 29, 2013
Priority date	Apr 30, 2012
Publication date	Oct 6, 2015
Grant date	Oct 6, 2015

Abstract

A head 2 has a face 4 . The face 4 has a plurality of score line grooves 8 and a plurality of fine grooves 10 . A depth of fine groove 10 is less than 0.03 mm. A width of the fine groove 10 is 0.1 mm or greater and 0.3 mm or less. A pitch of the fine groove 10 is 0.3 mm or greater and 0.8 mm or less. The fine groove 10 has a first direction extending part d 1 extending in a first direction and a second direction extending part d 2 extending in a second direction. The first direction is a direction directed to a top blade side toward a heel side. The second direction is a direction directed to the top blade side toward a toe side. The score line groove 8 and the fine groove 10 do not cross each other.

First claim

What is claimed is:

1. A golf club head comprising a face,
wherein the face has a plurality of score line grooves, a plurality of fine grooves, and a land area;
a depth of the fine groove is less than 0.03 mm;
a width of the fine groove is 0.1 mm or greater and 0.3 mm or less;
a pitch of the fine groove is 0.3 mm or greater and 0.8 mm or less;
the fine groove has a first direction extending part extending in a first direction and a second direction extending part extending in a second direction;
the first direction is a direction directed to a top blade side toward a heel side;
the second direction is a direction directed to the top blade side toward a toe side; and
the score line groove and the fine groove do not cross each other.

2. The golf club head according to claim 1 , wherein when an absolute value of an angle between an extending direction of the score line groove and the first direction is defined as α, and an absolute value of an angle between the extending direction of the score line groove and the second direction is defined as β, α≦β is set.

3. The golf club head according to claim 2 , wherein the angle α is 5 degrees or greater and 45 degrees or less, and the angle β is 5 degrees or greater and 90 degrees or less.

4. The golf club head according to claim 2 , wherein the angle β is greater than the angle α.

5. The golf club head according to claim 1 , wherein the fine groove consists of the first direction extending part and the second direction extending part, and
an angle θ between the first direction and the second direction is 45 degrees or greater and 170 degrees or less.

6. The golf club head according to claim 1 , wherein the fine grooves do not cross each other.

7. The golf club head according to claim 1 , further comprising a round part connecting the first direction extending part to the second direction extending part.

8. The golf club head according to claim 1 , wherein when an area of a portion sandwiched by the plurality of score line grooves is defined as Sa, and an area of the fine groove is defined as Sb, Sb/Sa is 0.14 or greater and 0.44 or less.

9. The golf club head according to claim 1 , wherein the fine groove is formed by a laser.

10. The golf club head according to claim 1 , further comprising a protruded part protruded from the land area, wherein the protruded part extends along the fine groove.

11. The golf club head according to claim 10 , wherein the protruded part is adjacent to the fine groove.

12. The golf club head according to claim 11 , wherein the protruded part is provided on the top blade side and sole side of the fine groove.

13. The golf club head according to claim 11 , wherein the protruded part is provided only on the top blade side of the fine groove.

14. The golf club head according to claim 11 , wherein when a width of the protruded part is defined as W 3 , and a width of the fine groove is defined as W 2 , W 3 /W 2 is 0.1 or greater and 0.7 or less.

15. The golf club head according to claim 1 , wherein when a length of the first direction extending part is defined as Ld 1 , and a length of the second direction extending part is defined as Ld 2 , the length Ld 1 is greater than the length Ld 2 .

16. The golf club head according to claim 15 , wherein Ld 1 /Ld 2 is 1.2 or greater and 11.5 or less.

17. The golf club head according to claim 1 , wherein the first direction extending parts and the second direction extending parts are alternately and continuously disposed.

18. The golf club head according to claim 1 , the first direction extending parts and the second direction extending parts are alternately disposed in the toe-heel direction with the first direction extending parts and the second direction extending parts separated from each other.

Assignees

• Dunlop Sports Co Ltd

Inventors

• Shimahara Yuki

Classifications

• A63B53/047

  iron-type · CPC title

• A63B2225/60

  Apparatus used in water · CPC title

• A63B53/0466

  wood-type · CPC title

• A63B53/0487

  for putters (A63B53/065 takes precedence) · CPC title

• A63B60/00 Primary

  Details or accessories of golf clubs, bats, rackets or the like · CPC title