Claims
- 1. A wood-type golf club head comprising:
a body having a crown, a sole, a ribbon, a striking plate and a hollow interior, the striking plate having an interior surface toward the hollow interior and a smooth exterior surface opposite the interior surface, the striking plate having a thickness range of 0.010 inch to 0.200 inch, the body having a volume of 250 cubic centimeters to 400 cubic centimeters; and a thin layer disposed on the exterior surface of the striking plate, the thin layer composed of a material having a density lower than the density of the striking plate, the thin layer having a thickness of 0.005 inch to 0.100 inch, the thin layer having a plurality of scorelines thereon.
- 2. The golf club head according to claim 1 wherein each of the plurality of scorelines have a depth of between 0.003 inch and 0.050 inch.
- 3. The golf club head according to claim 1 wherein the thin layer has a thickness range of 0.010 inch to 0.025 inch, and each of the plurality of scorelines have a depth of between 0.005 inch and 0.010 inch.
- 5. The golf club head according to claim 1 wherein the body is composed of a material selected from the group consisting of titanium, titanium alloys, stainless steel and composites.
- 6. The golf club head according to claim 1 wherein the thin layer is composed of a material selected from the group consisting of thermosetting polymers, thermoplastic polymers and low modulus metals.
- 7. The golf club head according to claim 6 wherein the thin layer is composed of a thermosetting polyurethane.
- 8. The golf club head according to claim 1 wherein the striking plate has an area between 4.80 square inches and 5.40 square inches.
- 9. The golf club head according to claim 1 wherein each of the plurality of scorelines is a projection extending outward 0.003 inch to 0.025 inch from a surface of the thin layer.
- 10. A wood-type golf club head comprising:
a body having a crown, a sole, a ribbon, a striking plate and a hollow interior, the body composed of a titanium alloy material, the striking plate having an interior surface toward the hollow interior and a smooth exterior surface opposite the interior surface, the striking plate having a thickness range of 0.010 inch to 0.200 inch, the body having a volume of 250 cubic centimeters to 400 cubic centimeters; and a thin layer disposed on the exterior surface of the striking plate, the thin layer composed of a polymer material having a density lower than the density of the striking plate, the thin layer having a thickness of 0.005 inch to 0.100 inch, the thin layer having a plurality of scorelines thereon; wherein the golf club head has a coefficient of restitution of at least 0.83 under USGA test conditions.
- 11. A wood-type golf club head comprising:
a body having a crown, a sole, a ribbon, a striking plate and a hollow interior, the body composed of a metal material, the striking plate having an interior surface toward the hollow interior and a smooth exterior surface opposite the interior surface, the striking plate having a thickness range of 0.010 inch to 0.200 inch, the body having a volume of 250 cubic centimeters to 400 cubic centimeters; and a thin layer disposed on the exterior surface of the striking plate, the thin layer having a central impact region composed of a polyurethane material having a Shore D hardness greater than 50 for low friction and low energy loss, and a peripheral impact region composed of a polyurethane material having a Shore D hardness lower than 40 for a high friction coefficient and a high energy loss, the thin layer having a thickness of 0.005 inch to 0.100 inch, the thin layer having a plurality of scorelines thereon; wherein the golf club head has a coefficient of restitution of at least 0.83 under USGA test conditions.
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This Application is a continuation application of U.S. patent application Ser. No. 09/678,942, filed on Oct. 3, 2000.
Continuations (1)
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Number |
Date |
Country |
Parent |
09678942 |
Oct 2000 |
US |
Child |
10064664 |
Aug 2002 |
US |