Head of golf club and method of producing the same

• US 4,984,800 A
• Filed: 02/22/1990
• Issued: 01/15/1991
• Est. Priority Date: 09/30/1988
• Status: Expired due to Fees

• Current Assignee: Hamada Enterprise & Company Limited
• Original Assignee: Hamada Enterprise & Company Limited
• Inventors: Hamada, Jiro
• Primary Examiner(s): Layno, Benjamin
• Assistant Examiner(s): Passaniti, Sebastiano
• Application Number:
  US07/484,000
• Time in Patent Office: 327 Days
• Field of Search: 273/167-175, 273/77 R, 273/77 A, 273/DIG. 1, 273/DIG. 5, 273/DIG. 6, 273/DIG. 23, 264/250, 264/254, 264/259, 264/255, 264/271.1, 264/248, 264/241
• US Class Current: 473/346
• 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 53/0466 wood-type
• CPC Class Codes: A63B 60/00 Details or accessories of golf clubs, bats, rackets or the like
• CPC Class Codes: B29C 70/72 Encapsulating inserts having non-encapsulated projections, e.g. extremities or terminal portions of electrical components B29C70/742 takes precedence
• CPC Class Codes: B29L 2031/5227 Clubs
• CPC Class Codes: Y10S 273/01 Carbonate
• CPC Class Codes: Y10S 273/06 Nylon
• CPC Class Codes: Y10S 273/23 High modulus filaments

Abstract

This invention discloses a novel head of a golf club, especially of the type called "wood". The head includes a foamed core means therein which is firm with a light weight. The head also includes a face directly attached to the core means. The core means with the face is molded over with a shell. The inclusion of the core enables the head to be big with a light weight. The direct attachment of the face to the core means enables avoidance of deviation of the face relative to the core means over long use.

Claims

1. A head of a golf club comprising:

a core made of a foamed material;

a face attached to said core;

at least one of said core and said face having means for retaining a spaced apart constant juxtaposition with each other;

a shell molded over said core with said face attached thereto; and

a sole plate attached to a lower surface of the head.

2. A head in accordance with claim 1 further comprising a sheet attached by adhesion to the face at its surface facing said core, said sheet being of the same material as that of said shell.

3. A head in accordance with claim 2 wherein said face is provided with coarseness at its peripheral to help adhesion of the shell to the peripheral.

4. A head in accordance with claim 1 wherein said foamed core is made of a material selected from the group consisting of an ABS resin, a nylon, carbon fibers, or a polycarbonate.

5. A head in accordance with claim 4 wherein said foamed core is made of a material, selected form the group consisting of an ABS resin, a nylon, or a polycarbonate, with carbon fibers added to it.

6. A head in accordance with claim 1 wherein at least one of said core and said face are spaced apart in a constant juxtaposition from each other by stems projecting therefrom.

7. A head in accordance with claim 6 wherein said core and said face are spaced apart in a constant juxtaposition from each other by stems projecting from said face.

8. A head in accordance with claim 6 wherein at least one of said core and said face have recesses for receiving the free ends of said stems to position said face properly with respect to said core.

9. A head of a golf club comprising:

a core made of a foamed material;

a face attached to said core, at least one of said core and said face having means for retaining a spaced apart constant juxtaposition with each other;

a shell molded over said core with said face attached thereto;

a sheet attached by adhesion to said face at its surface facing said core to help adhesion of said shell to said face, said sheet being of the same material as that of said shell, said face provided with coarseness at its peripheral to help adhesion of said shell to the peripheral; and

a sole plate attached to a lower surface of the head.

10. A method of producing a head of a golf club, said head comprising a core made of a foamed material, a face attached to said core, a shell molded over said core with said face attached thereto, and a sole plate attached to a lower surface of the head, said method including the steps of:

molding said core foamed material;

attaching said face in a constant juxtaposition to said core by stems projecting from said face;

molding said shell over said core with said face attached thereto by stems projecting form said face to form the head; and

attaching said sole to the lower surface of the head.

11. A method of producing a head of a golf club, said head comprising a core made of a foamed material, a face attached to said core, a shell molded over said core with said face attached thereto, and a sole plate attached to the lower surface of the head, said method including the steps of:

molding said core of foamed material;

attaching said face in a constant juxtaposition to said core by means of at least one of said core and said face having upright cylindrical pedestals projecting therefrom;

molding said shell over said core to form the head with said face attached thereto by said upright cylindrical pedestals each having a top, and a free end located opposite said top end with said free end disposable in abutting relation on one of said face and said core, and a cylindrical insert coaxially integrated with said top of said pedestal, and attaching said sole plate to a lower surface of the head.

12. A method in accordance with claim 11 wherein said sole plate is directly attached to said core in advance of molding said shell.