Golf club striking plate with variable thickness

• US 6,398,666 B1
• Filed: 06/28/2000
• Issued: 06/04/2002
• Est. Priority Date: 11/01/1999
• Status: Expired due to Term

• Current Assignee: Callaway Golf Company (Topgolf Callaway Brands Corp.)
• Original Assignee: Callaway Golf Company (Topgolf Callaway Brands Corp.)
• Inventors: Galloway, J. Andrew, Evans, D. Clayton
• Primary Examiner(s): Sewell, Paul T.
• Assistant Examiner(s): VARMA, SNEH K
• Application Number:
  US09/606,809
• Time in Patent Office: 706 Days
• Field of Search: 473/290, 473/291, 473/324, 473/329, 473/342, 473/350, 473/345, 473/346, 473/349, 473/305
• US Class Current: 473/345
• 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 53/045 Strengthening ribs
• 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 53/08 with special arrangements for obtaining a variable impact
• 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 head having a striking plate with regions of varying thickness is disclosed herein. A central region has a first thickness range that is thicker than the thickness range of any of the other regions. The thickness of the regions decreases outward from the center. The striking plate may be used on a fairway wood-type golf club head or a driver-type golf club head. The striking plate is preferably composed of steel or titanium.

Claims

1. A golf club head comprising:

a body having a crown, a sole, a heel end and a toe end, the body having a volume in excess of 300 cubic centimeters and a hollow interior; and

a unitary striking plate having a core face area having an area ranging between 4.80 square inches and 5.40 square inches, the core face area consisting of a circular central region, a transition region and a first peripheral region, the unitary striking plate comprising the core face area comprising a circular central region, a transition region, a first peripheral region and a second peripheral region, the circular central region having an uniform first thickness ranging from 0.090 inch to 0.145 inch and occupying 5% to 15% of the exterior surface of a core face are the transition region encircling the circular central region and occupying 35% to 50% of the exterior surface of a core face area, the first peripheral region encompassing the transition region and occupying 40% to 55% of the exterior surface of the core face area, the first peripheral region having an uniform second thickness less than the first thickness and ranging from 0.040 inch to 0.110 inch, the transition region having a thickness that transitions from the first thickness to the second thickness, the second peripheral region encompassing the first peripheral region and having a third thickness that ranges from 0.010 inch to 0.085 inch.

2. The golf club head according to claim 1 wherein the unitary striking plate is composed of a material selected from the group consisting of titanium, titanium alloys, steels, vitreous metals, ceramics, composites, carbon materials, carbon fiber materials, other fibrous materials and mixtures thereof.

3. The golf club head according to claim 1 wherein the central region occupies approximately 8.8% of the core face area, the transition region occupies 42.2% of the core face area and the first peripheral region occupies 50% of the core face area.