Golf club head

• US 4,728,105 A
• Filed: 10/24/1986
• Issued: 03/01/1988
• Est. Priority Date: 10/31/1985
• Status: Expired due to Fees

• Current Assignee: Maruman Golf Co., Ltd.
• Original Assignee: Maruman Golf Co., Ltd.
• Inventors: Kobayashi, Masashi
• Primary Examiner(s): Marlo, George J.
• Application Number:
  US06/922,964
• Time in Patent Office: 494 Days
• Field of Search: 273/169, 273/171, 273/167 R, 273/167 F, 273/172, 273/173, 273/174
• US Class Current: 473/348
• 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 53/0433 with special sole configurations
• 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

Abstract

A club-head for a golf club includes a hitting portion (11) having a front surface (11a) for hitting a golf ball, a rear surface (11b), a sole surface (11c) and heel and toe ends (11d, 11e), and a hosel portion (12) extending obliquely upward from the heel end (11d) of the hitting portion. The hitting portion (11) comprises a main body (13) made of a fiber-reinforced plastic for defining at least a part of the front and rear surfaces (11a, 11b) of the hitting portion. A metal sole member (14) having a specific gravity greater than that of the main body (13) is integrally joined to the main body (13) along the underside of the main body for defining at least the sole surface (11c) of the hitting portion (11). A reinforcing plate (19) is fitted at the lower end portion thereof into the sole member (14) and extends upwardly from the sole member into the main body (13) substantially in parallel to the front surface (11a) of the hitting portion (11). The reinforcing plate (19) has a specific gravity less than that of the sole member (14) and a strength greater than that of the main body (13).

Claims

1. A club-head for a golf club including a hitting portion having a front surface for hitting a golf ball, a rear surface, a sole surface and heel and toe ends, and a hosel portion extending obliquely upward from said heel end of said hitting portion, said hitting portion comprising:

a main body made of a fiber-reinforced plastic for defining at least a part of said front and rear surfaces of said hitting portion;

a metal sole member having a specific gravity greater than that of said main body and integrally joined to said main body along the underside of said main body for defining at least said sole surface of said hitting portion; and

a reinforcing plate having a lower end portion fitted into said sole member and extending upwardly from said sole member into said main body substantially in parallel to said front surface of said hitting portion, said reinforcing plate having a specific gravity less than that of said sole member and a strength greater than that of said main body.

2. A club-head according to claim 1, wherein the upperside of said sole member is formed integrally with a ridge projecting upwardly and extending between the vicinity of said heel end and the vicinity of said toe end of said hitting portion, said ridge being formed with a groove for receiving said lower end portion of said reinforcing plate.

3. A club-head according to claim 1, wherein said hitting portion is provided at said rear surface thereof with a weight plate integrally fixed to said main body and having a specific gravity greater than that of said main body.