GOLF CLUB HEAD

• US 20130225319A1
• Filed: 02/19/2013
• Published: 08/29/2013
• Est. Priority Date: 02/29/2012
• Status: Active Grant

• Current Assignee: Sumitomo Rubber Industries Limited
• Original Assignee: Dunlop Sports Co. Ltd. (Sumitomo Rubber Industries Limited)
• Inventors: KATO, Akira
• Granted Patent: US 9,033,820 B2
• Time in Patent Office: Days
• US Class Current: 473/331
• CPC Class Codes: A63B 2053/0479 Wedge-type clubs, details thereof
• 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 53/0487 for putters A63B53/065 takes precedence
• CPC Class Codes: B23K 2103/16 Composite materials , e.g. fibre reinforced
• CPC Class Codes: B23K 2103/42 Plastics B23K2103/16 takes precedence
• CPC Class Codes: B23K 2103/50 Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
• CPC Class Codes: B23K 26/359 by providing a line or line pattern, e.g. a dotted break initiation line
• CPC Class Codes: B23K 26/364 for making a groove or trench, e.g. for scribing a break initiation groove
• CPC Class Codes: B23K 26/40 taking account of the properties of the material involved

Abstract

A golf club head of the present invention includes a face. The face has a score line groove, a fine groove, and a land area. A depth of the fine groove is 0.01 mm or greater and 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 0.7 mm or less. Preferably, the face further has a protruding part protruding beyond the land area. Preferably, the protruding part is provided on a top blade side of the fine groove. Preferably, the protruding part extends along the fine groove.

Claims

1. A golf club head comprising a face, wherein

the face has a score line groove, a fine groove, and a land area;

a depth of the fine groove is 0.01 mm or greater and less than 0.03 mm;

a width of the fine groove is 0.1 mm or greater and 0.3 mm or less; and

a pitch of the fine groove is 0.3 mm or greater and 0.7 mm or less.

2. The golf club head according to claim 1, wherein the face further has a protruding part protruding beyond the land area;

the protruding part is provided on a top blade side of the fine groove; and

the protruding part extends along the fine groove.

3. The golf club head according to claim 1, wherein the fine groove is formed using a laser;

and

the protruding part is formed by moving a portion heated by the laser by the operation of gravity.

4. The golf club head according to claim 2, wherein a height of the protruding part is 0.001 mm or greater and 0.02 mm or less.

5. The golf club head according to claim 1, wherein the pitch of the fine groove is 1.5 times or greater the width of the fine groove and 5 times or less the width of the fine groove.

6. The golf club head according to claim 1, wherein an angle θ

between the score line groove and the fine groove is −

45 degrees or greater and 45 degrees or less.

7. The golf club head according to claim 2, wherein the protruding part is adjacent to the fine groove.

8. The golf club head according to claim 2, wherein the protruding part is provided only on the top blade side of the fine groove.

9. The golf club head according to claim 1, wherein the plurality of score line grooves are formed;

the plurality of fine grooves are formed;

all the score line grooves are parallel to each other; and

all the fine grooves are parallel to the score line grooves.

10. The golf club head according to claim 1, wherein the fine groove is inclined with respect to the score line groove;

and

the fine groove is inclined so that a toe side of the fine groove is located on a top blade side.

11. The golf club head according to claim 1, wherein the fine groove is inclined with respect to the score line groove;

and

the fine groove is inclined so that a toe side of the fine groove is located on a sole side.

12. The golf club head according to claim 3, wherein the golf club head is manufactured by a manufacturing method comprising the steps of:

making a fluid dissolved by irradiation of the laser flow by gravity while irradiating the face with the laser in a state where the face is inclined; and

solidifying the fluid to form the protruding part.

13. The golf club head according to claim 8, wherein the golf club head is manufactured by a manufacturing method comprising the steps of:

making a fluid dissolved by irradiation of the laser flow by gravity while irradiating the face with the laser in a state where the face is inclined so that a sole surface side of the face is located above the top blade side; and

solidifying the fluid to form the protruding part.