High cofficient of restitution golf club head

• US 6,390,933 B1
• Filed: 11/02/2000
• Issued: 05/21/2002
• Est. Priority Date: 11/01/1999
• Status: Expired due to Term

• Current Assignee: Callaway Golf Company
• Original Assignee: Callaway Golf Company
• Inventors: Galloway, J. Andrew, Hocknell, Alan, Helmstetter, Richard C., Aguinaldo, Homer E., Boyce, Ronald C.
• Primary Examiner(s): Sewell, Paul T.
• Assistant Examiner(s): VARMA, SNEH K
• Application Number:
  US09/705,253
• Time in Patent Office: 565 Days
• Field of Search: 473/329, 473/345, 473/342, 473/327, 473/332, 473/305, 473/290, 473/337, 148/522, 148/542
• US Class Current: 473/345
• CPC Class Codes: A63B 2209/00 Characteristics of used materials
• CPC Class Codes: A63B 53/02 Joint structures between the head and the shaft
• CPC Class Codes: A63B 53/04 Heads
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0412 Volume
• 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 53/0441 with visual indicators for aligning the golf club
• CPC Class Codes: A63B 53/0458 with non-uniform thickness of the impact face plate
• CPC Class Codes: A63B 53/0462 characterised by tapering thickness of the impact face plate
• 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: B21J 5/00 Methods for forging, hammering, or pressing for working sheet-metal or metal tubes, rods, or profiles B21D; for working wire B21F; Special equipment or accessories therefor
• CPC Class Codes: B21K 17/00 Making sport articles, e.g. skates
• CPC Class Codes: C22F 1/183 of titanium or alloys based thereon
• CPC Class Codes: C23F 1/00 Etching metallic material by chemical means manufacture of printing surfaces B41C; manufacture of printed circuits H05K
• CPC Class Codes: C23F 1/26 for etching refractory metals

Abstract

A golf club having a club head having with a coefficient of restitution greater than 0.845 and a durability to withstand 2000 impacts with a golf ball at 110 mile per hour is disclosed herein. The club head may be composed of three pieces, a face, a sole and a crown. Each of the pieces may be composed of a titanium material. The club head may be composed of a titanium material, have a volume in the range of 175 cubic centimeters to 400 cubic centimeters, a weight in the range of 165 grams to 300 grams, and a striking plate surface area in the range of 4.00 square inches to 7.50 square inches.

Claims

1. A golf club comprising:

a golf club head having a body comprising a crown, a sole and a face member having a fiace extension and comprising a striking plate, the body having a hollow interor defined by the crown, the sole and an interior surface of the striking plate,

the face extension of the face member comprising an upper lateral extension and a lower lateral extension, wherein a hosel section is located in the upper lateral extension and a bore section is located in the lower lateral extension; and

wherein the hosel section has a width greater han the width of the entirety of the upper later extension and wherein the bore section has a width greater than the width of the entirety of the lower lateral extension;

the golf club head having a coefficient of restitution of at least 0.85, and the striking plate having the durability to withstand failure after at least 2000 impacts with an USGA conforming golf ball against a center of the striking plate at approximately 110 miles per hour.

2. The golf club head according to claim 1 wherein the striking plate has a thickness in the range of 0.035 inch to 0.125 inch.

3. The golf club head according to claim 1 wherein the striking plate has a thickness in the range of 0.060 inch to 0.0110 inch.

4. The golf club head according to claim 1 further comprising an interior tubing for receiving a shaft, the interior tubing engaging an upper portion of the face extension and a lower portion of the face extension.

5. A golf club head comprising:

a face member comprising a striking plate composed of a forged material for striking a golf ball having an exterior surface and an interior surface, the striking plate having a face aspect ratio between 1.0 and 1.7 and extending from a heel section of the golf club head to a toe section of the golf club head, a face extension extending laterally inward from a perimeter of the face plate, and an interior tubing for receiving a shaft, the interior tubing engaging an upper portion of the face extension and a lower portion of the face extension;

a crown secured to the upper portion of the face extension at a distance from between 0.2 inch to 1.0 inch from the face plate; and

a sole plate secured to the lower portion of the face extension at a distance from between 0.2 inch to 1.0 inch from the striking plate;

wherein the golf club head has a coefficient of restitution of at least 0.85.

6. The golf club head according to claim 5 wherein the striking plate has a thickness in the range of 0.035 inch to 0.125 inch.

7. The golf club head according to claim 5 wherein the striking plate has a thickness in the range of 0.060 inch to 0.0110 inch.

8. A golf club head comprising:

a face member comprising a striking plate for striking a golf ball having an exterior surface and an interior surface, the striking plate extending from a heel section of the golf club head to a toe section of the golf club head, a face extension extending laterally inward from a perimeter of the face plate, and an interior tubing for receiving a shaft, the interior tubing engaging an upper portion of the face extension and a lower portion of the face extension;

a crown secured to the upper portion of the face extension at a distance from between 0.2 inch to 1.0 inch from the face plate; and

a sole plate secured to the lower portion of the face extension at a distance from between 0.2 inch to 1.0 inch from the striking plate;

wherein the golf club head has a coefficient of restitutioun ring from 0.845 to 0.87, and the striking plate has the durability to withstand failure after at least 2000 impact with an USGA conforming two-piece golf ball against a center of the striking plate at approximately 110 miles per hour.