Golf club head

• US 4,568,088 A
• Filed: 10/18/1983
• Issued: 02/04/1986
• Est. Priority Date: 10/19/1982
• Status: Expired due to Term

• Current Assignee: Sumitomo Rubber Industries Limited
• Original Assignee: Sumitomo Rubber Industries Limited
• Inventors: Kurahashi, Kouichiro
• Primary Examiner(s): Marlo, George J.
• Application Number:
  US06/543,151
• Time in Patent Office: 840 Days
• Field of Search: 273/167 F, 273/169, 273/170, 273/171, 273/172, 273/174, 273/173, 273/175, 273/167 J, 273/167 K
• US Class Current: 473/343
• CPC Class Codes: A63B 2209/023 Long, oriented fibres, e.g. wound filaments, woven fabrics, mats
• CPC Class Codes: A63B 53/04 Heads
• CPC Class Codes: A63B 53/0416 Heads having an impact surface provided by a face insert
• CPC Class Codes: A63B 53/0466 wood-type
• CPC Class Codes: A63B 60/00 Details or accessories of golf clubs, bats, rackets or the like
• CPC Class Codes: B27K 3/156 Combined with grafting onto wood fibres
• CPC Class Codes: C08K 5/14 Peroxides
• CPC Class Codes: C08K 5/1535 Five-membered rings
• CPC Class Codes: C08L 25/06 Polystyrene
• CPC Class Codes: C08L 33/12 Homopolymers or copolymers of methyl methacrylate
• CPC Class Codes: C08L 71/02 Polyalkylene oxides
• CPC Class Codes: C08L 97/02 Lignocellulosic material, e.g. wood, straw or bagasse manufacture of articles made from lignocellulosic material by dry processes B27N

Abstract

A golf club head of a wood-type golf club comprising a wooden club head body entirely reinforced by a wood-plastic combination, in which a predetermined thickness of a high density portion is impregnated with plastics at a percentage ranging from 10 to 60% by weight, lies adjacent to a front impact face of the club head, while the remainder portion is lower in density than the high density layer.

Claims

1. A golf club head having an impact front face comprising

a wooden club head body entirely reinforced by a wood-plastic combination,

said club head body including at a predetermined, uniform thickness a uniform high density layer extending substantially parallel to said impact front face thereof,

said uniform high density layer being impregnated with plastics at a higher percentage than a remainder low density portion of said club head body

said uniform thickness of said uniform high density layer being within a range from 5 to 15 mm, and

said uniform high density layer being impregnated with plastics at a percentage ranging from 10 to 60% by weight.

2. The golf club head, as defined in claim 1, wherein

said plastics include graft monomers of methyl methacrylate, styrene, and polyethylene glycol mono-methacrylate.

3. The golf club head, as defined in claim 1, wherein

said remainder portion is impregnated with plastics at a percentage ranging from 3 to 12% by weight.

4. The golf club head, as defined in claim 1, wherein

said plastics further include graft monomers of polypropylene glycol mono-methacrylate.