Golf club head

• US 5,009,425 A
• Filed: 10/27/1989
• Issued: 04/23/1991
• Est. Priority Date: 10/27/1988
• Status: Expired due to Term

• Current Assignee: Yokohama Rubber Company Limited
• Original Assignee: Yokohama Rubber Company Limited
• Inventors: Hayashi, Tstsuya, Ninomiya, Toshio, Okumoto, Takaharu
• Primary Examiner(s): Coven, Edward M.
• Assistant Examiner(s): Passaniti, Sebastiano
• Application Number:
  US07/427,539
• Time in Patent Office: 543 Days
• Field of Search: 273/DIG. 7, 273/DIG. 23, 273/167 H, 273/169, 273/171.173, 273/167 J, 273/167 R, 273/DIG. 5, 273/DIG. 12, 264/259, 264/255, 264/241, 264/271.1, 264/328.18, 264/297.2, 428/308.4, 428/318.4
• US Class Current: 473/348
• CPC Class Codes: A63B 2209/02 with reinforcing fibres, e.g. carbon, polyamide fibres
• CPC Class Codes: A63B 53/04 Heads
• CPC Class Codes: A63B 53/0433 with special sole configurations
• 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
• CPC Class Codes: Y10S 273/05 Vinyl
• CPC Class Codes: Y10S 273/12 Propylene
• CPC Class Codes: Y10S 273/23 High modulus filaments

Abstract

A golf club head in which a core buried in the interior of an outer shell of a fiber reinforced resin is molded out of a molten mixture of a thermoplastic resin and powder of a metal having a high specific gravity, and a method of manufacturing such golf club heads.

Claims

1. A wood-type golf club head comprising an outer shell consisting of a fiber reinforced thermosetting resin having the shape of a wooden golf club, a metal sole provided on a lower surface of said outer shell, and a core placed on an upper surface of said sole so as to be buried in the interior of said outer shell, said core being molded from a mixture of a thermoplastic resin selected from the group consisting of polyamide, polybutylene terephthalate, polypropylene, ABS and hard vinyl chloride and a metal powder having a high specific gravity selected from the group consisting of zinc, lead and tungsten.

2. The wood-type golf club head of claim 1, wherein said core contains a fibrous reinforcing material selected form the group consisting of short glass fibers, short carbon fibers and whiskers.

3. The wood-type golf club head of claim 1, wherein the specific gravity of said core mixture is from about 1.5 to 5.0.

4. The wood-type golf club head of claim 3, wherein the surface hardness of said core is 80 to 130 in Rockwell hardness.