Wood-type golf club head for number one golf club

• US 4,890,840 A
• Filed: 02/23/1988
• Issued: 01/02/1990
• Est. Priority Date: 02/25/1987
• Status: Expired due to Fees

• Current Assignee: Maruman Golf Co., Ltd.
• Original Assignee: Maruman Golf Co., Ltd.
• Inventors: Kobayashi, Masashi
• Primary Examiner(s): Coven, Edward M.
• Assistant Examiner(s): Layno, Benjamin
• Application Number:
  US07/159,095
• Time in Patent Office: 679 Days
• Field of Search: 273/164, 273/167 F, 273/167 H, 273/167 A, 273/167 E, 273/169-172
• US Class Current: 473/344
• CPC Class Codes: A63B 53/04 Heads
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• 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 53/0462 characterised by tapering thickness of the impact face plate
• CPC Class Codes: A63B 60/00 Details or accessories of golf clubs, bats, rackets or the like

Abstract

A number one wood-type golf club head comprising a body made of wood. A sole plate is secured to the bottom surface of the wooden body, and at least one cavity is provided in the wooden body and having an opening at the bottom surface, to thereby allow the golf club head to be elongated; the body having a length between a front end and a rear end thereof, from the viewpoint of the swing of the golf club, of more than 83 millimeters. This provides for a greater moment of inertia to obtain a stable drive.

Claims

1. A number one wood-type golf club i.e., a driver, which comprises:

a club head made of persimmon and having a bottom surface and a sole plate secured to said bottom surface;

said club head having a front surface to which a front plate is secured to constitute a face for hitting a golf ball and a length between said front plate and a rear end thereof, from the viewpoint of the swing of the golf club, of more than 83 millimeters;

said club head having at least one cavity therein opening at the bottom surface thereof to be covered by said sole plate, said at least one cavity having a blind end with a semispherical shape; and

whereby said golf club has an increased moment of inertia and an increase in the possibility of obtaining a square hit with said golf club.

2. A number one wood-type golf club i.e., a driver, which comprises:

a club head made of persimmon and having a bottom surface and a sole plate secured to said bottom surface;

said club head having a front surface to which a front plate is secured to constitute a face for hitting a golf ball and a length between said front plate and a rear end thereof, from the viewpoint of the swing of the golf club, of more than 83 millimeters;

said club head having at least one cavity therein opening at the bottom surface thereof to be covered by said sole plate;

said at least one cavity comprising two cavities extending perpendicular to the bottom surface and in alignment with each other in a vertical plane perpendicular to said front surface; and

whereby said golf club has an increased moment of inertia and an increase in the possibility of obtaining a square hit with said golf club.

3. A number one wood-type golf club, i.e., a driver, which comprises:

a club head made of persimmon and having a bottom surface and a sole plate secured to said bottom surface;

said club head having a front surface to which a front plate is secured to constitute a face for hitting a golf ball and a length between said front plate and a rear end thereof, from the viewpoint of the swing of the golf club, of more 83 millimeters;

said club head having at least one cavity therein opening at the bottom surface thereof to be covered by said sole plate;

said at least one cavity comprising two cavities extending perpendicular to the bottom surface and in alignment with each other in a vertical plane perpendicular to said front surface;

wherein said two cavities are located in such a manner that the center of gravity of said golf club head lies between said two cavities; and

whereby said golf club has an increased moment of inertia and an increase in the possibility of obtaining a square hit with said golf club.