Golf club head

• US 20050215351A1
• Filed: 02/07/2005
• Published: 09/29/2005
• Est. Priority Date: 03/24/2004
• Status: Active Grant

• Current Assignee: Sumitomo Rubber Industries Limited
• Original Assignee: Sumitomo Rubber Industries Limited
• Inventors: Hasegawa, Hiroshi
• Granted Patent: US 7,252,599 B2
• Time in Patent Office: Days
• US Class Current: 473/345
• CPC Class Codes: A63B 2209/02 with reinforcing fibres, e.g. carbon, polyamide fibres
• CPC Class Codes: A63B 2209/023 Long, oriented fibres, e.g. wound filaments, woven fabrics, mats
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0412 Volume
• CPC Class Codes: A63B 53/0416 Heads having an impact surface provided by a face insert
• CPC Class Codes: A63B 53/0433 with special sole configurations
• CPC Class Codes: A63B 53/0437 with special crown configurations
• CPC Class Codes: A63B 53/0466 wood-type
• CPC Class Codes: A63B 53/0487 for putters A63B53/065 takes precedence

Abstract

A hollow golf club head comprises a metal member made of at least one kind of metal material having at least one opening, and a FRP member made of a fiber reinforced resin attached to the metal member so as to cover the opening, wherein the metal member has at least one slit extending along the opening, in at least a part of a periphery of the opening, and the FRP member has a locking portion entering into the slit from one side of an outer surface or an inner surface of the metal member and getting out of the other side so as to extend along a surface thereof.

Claims

1. A hollow golf club head comprising

a metal member made of at least one kind of metal material having at least one opening, and

a FRP member made of a fiber reinforced resin attached to the metal member so as to cover the opening, wherein

the metal member has at least one slit extending along the opening, in at least a part of a periphery of the opening, and

the FRP member has a locking portion entering into the slit from one side of an outer surface or an inner surface of the metal member and getting out of the other side so as to extend along a surface thereof.

2. The golf club head according to claim 1, wherein the locking portion is made of a plurality of prepreg plies comprising at least one locking prepreg ply having reinforcing fibers which extend continuously from the one side to the other side of the metal member.

3. The golf club head according to claim 1, wherein the metal member comprises a face portion whose front face defines a club face for striking a ball and a crown portion intersecting the club face at the upper edge thereof,

the opening is provided with the crown portion, and

the slit is provided between the opening and the upper edge of the club face.

4. The golf club head according to claim 3, wherein in the metal member, a width Wu between the opening and the slit is from 1 to 30 mm,

a width Wm between the slit and the upper edge of the club face is from 1 to 30 mm,

and a ratio (Wm/Wu) of the widths is from 0.5 to 10.

5. The golf club head according to claim 1, 2 or 3, wherein

the slit has a first edge extending along a side of the opening and positioned at the one side of the metal member, and a second edge extending along a far side from the opening and positioned at the other side of the metal member,

and a difference of the height between the first edge and the second edge is from 0.1 to 2.0 mm.

6. The golf club head according to claim 1, 2 or 3, wherein

the slit has at least a corner portion which is in contact with the locking portion, and

the corner portion is rounded in a cross section perpendicular to a longitudinal direction of the slit.

7. The golf club head according to claim 2, wherein the locking prepreg ply comprises at least one prepreg ply entering into the slit from the outer surface of the metal member and extending along the inner surface thereof.

8. The golf club head according to claim 7, wherein the prepreg plies comprise at least one outer prepreg ply arranged in an outer side of the locking prepreg ply, and extending so as to cover the opening and the slit without entering into the slit.

9. The golf club head according to claim 2, wherein the locking prepreg ply comprises at least one prepreg ply entering into the slit from the inner surface of the metal member and extending along the outer surface thereof.

10. The golf club head according to claim 9, wherein the prepreg plies comprise at least one inner prepreg ply arranged in an inner side of the locking prepreg ply, and extending so as to cover the opening and the slit without entering into the slit.

11. The golf club head according to claim 1, wherein the slit has a width in a range of from 0.5 to 10.0 mm.