Metal wood golf club head

• US 5,769,735 A
• Filed: 12/09/1996
• Issued: 06/23/1998
• Est. Priority Date: 09/11/1995
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Hosokawaseisakusho
• Original Assignee: Kabushiki Kaisha Hosokawaseisakusho
• Inventors: Hosokawa, Toshihiro
• Primary Examiner(s): Passaniti, Sebastiano
• Application Number:
  US08/762,048
• Time in Patent Office: 561 Days
• Field of Search: 473/324, 473/325, 473/326, 473/327, 473/328, 473/329, 473/330, 473/331, 473/332, 473/333, 473/334, 473/335, 473/336, 473/341, 473/345, 473/346, 473/347, 473/348, 473/349, 473/350, 473/282
• US Class Current: 473/332
• CPC Class Codes: A63B 2209/00 Characteristics of used materials
• 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: B22F 7/002 of porous nature

Abstract

A metal wood club head for golf and a method for producing the metal wood golf club head relating to the present invention can transmit, to his hands through the shaft, the feeling of where on the club face the user hit the ball similar to persimmon heads so that the user can make progress in playing golf, cause little trouble to his elbows because of the decreased vibration at the impact of a shot, have sperior durability and impact resiliency, and are readily suitable for mass-production on the assembly line. The club head comprises a metal outer shell having a hollow inside portion and foamed metal arranged into the hollow inside portion which are united integrally. A main member of the club head may be a foamed metal. Then it is favorable that at least the face plate of the main member is covered with metal. The surface of the main member may be covered with a divided shell member.

Claims

1. A metal wood golf club head comprising:

a metal outer shell; and

a foamed aluminum inside portion having a sequence of cells distributed throughout the entirety of said foamed aluinum inside portion and having an apparent specific gravity of about 0.2-0.3 and porosity of about 65-78%, and fixedly attached within the metal outer shell and formed integrally with said metal outer shell.

2. The metal golf club head recited in claim 1 wherein the majority of the golf club head by volume is foamed aluminum.

3. The metal golf club head of claim 2 and further comprising a face plate in contact with said metal shell, wherein said at least a surface of the face plate is covered with metal.

4. A metal golf club head comprising:

a divided metal outer shell having a first portion including a hollowed area and matable with a second portion having a hollowed area to completely surround and enclose said hollowed areas; and

a foamed aluminum inside portion having a sequence of cells distributed throughout the entirety of said foamed aluminum inside portion and having an apparent specific gravity of about 0.2-0.3 and a porosity of about 65-78% and fixedly carried within said hollowed area.

5. The metal golf club head as recited in claim 4 wherein said first and second portion of said divided metal outer shell is a cast metal.

6. The metal golf club head as recited in claim 5 wherein said upper main member and said sole portion of said divided metal outer shell are press metal.