Golf club head

• US 4,635,941 A
• Filed: 03/15/1985
• Issued: 01/13/1987
• Est. Priority Date: 03/15/1985
• Status: Expired due to Fees

• Current Assignee: Yonex Kabushiki Kaisha
• Original Assignee: Yonex Kabushiki Kaisha
• Inventors: Yoneyama, Minoru
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Rose, Stuart W.
• Application Number:
  US06/712,231
• Time in Patent Office: 669 Days
• Field of Search: 273/DIG. 23, 273/167 D, 273/167 R, 273/167 F, 273/167 H, 273/167 J, 273/167 E, 273/175, 273/DIG. 7
• US Class Current: 473/331
• 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 53/0416 Heads having an impact surface provided by a face insert
• CPC Class Codes: A63B 53/0445 Details of grooves or the like on the impact surface
• CPC Class Codes: A63B 53/045 Strengthening ribs
• CPC Class Codes: A63B 53/0454 Strengthening ribs on the rear surface of the impact face plate
• CPC Class Codes: A63B 53/0458 with non-uniform thickness of the impact face plate
• 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 273/23 High modulus filaments

Abstract

A golf club head includes a sole of metal material, an inner head member integral with the sole and having a substantially triangular shape in cross section, a hosel for receiving a shaft, and an outer head member formed of carbon fiber reinforced resin material and having a substantially inverted V-shaped cross-sectional configuration covering the entirety of the inner head member. Lower ends of the outer head member are in close contact with shoulders formed between the sole and the lower end of the inner head member, and marginal edges of such lower ends are flush with the sole. The joint between the inner and outer head members is strengthened by elements formed on the outer surface of the inner head member.

Claims

1. A golf club head comprising:

a sole formed of metal material;

an inner head member of metal material formed integrally with said sole, said inner head member extending upwardly from said sole and having a substantially triangular shape in cross section, a lower end of said inner head member having a thickness in a direction of swing of the head smaller than the thickness of said sole to provide front and rear shoulders therebetween;

a hosel for receiving a shaft therein and formed of metal material integrally with said sole and said inner head member, said hosel being integral with said sole and said inner head member at a heel portion of the golf club head;

an outer head member formed of carbon fiber reinforced resin material, said outer head member having a substantially inverted V-shaped cross sectional configuration covering the entirety of said inner head member, lower ends of said outer head member being in close contact with said shoulders with marginal edges of said lower ends being flush with said sole; and

a means for strengthening the joint between said inner and outer head members, said means comprising a hole and a plurality of dimples formed in said inner head member, said hole being formed at substantially a central portion of said inner head member and extending therethrough from front to back thereof, said dimples being formed all around the outer surface of said inner head member, said carbon fiber reinforced resin material of said outer head member filling said hole and being in close fit in said dimples.

2. A golf club head as claimed in claim 1, wherein said outer head member includes an integral tubular extension covering the entirety of said hosel.