Callaway Golf Company

Michael A. Catania

Augustin W Rollison

Richard C Helmstetter

Ronald K Hettinger

Joshua G Breier

Pijush K Dewanjee

J Neil Hall

John G Guard

Kamal Sarkar

The present invention is a golf club ( ) having a club head main body ( ) with a recess ( ), an polymer insert ( ) in the recess ( ), an isolation layer ( ) and a weight body ( ). The polymer insert ( ) is composed of a thermosetting polyurethane material having a Shore D hardness in the range of 42 to 55, and a Bayshore rebound in the range of 51 to 60. The preferred thermosetting polyurethane material is formed from a p-phenylene diisocyanate prepolymer and a curing agent. The golf club ( ) is preferably a putter, however, it may be a wood or an iron. The particular thermosetting polyurethane provides a soft striking face for feel and a good rebound for distance. The weight body ( ) is preferably composed of a tungsten alloy, and the isolation layer ( ) is preferably composed of a thermoplastic polyurethane.

Multiple material golf club head with a polymer insert face

The present invention is a golf club (,) having a club head main body (,) with a recess (,), an polymer insert (,) in the recess (,), an isolation layer (,) and a weight body (,). The polymer insert (,) is composed of a thermosetting polyurethane material having a Shore D hardness in the range of 42 to 55, and a Bayshore rebound in the range of 51 to 60. The preferred thermosetting polyurethane material is formed from a p-phenylene diisocyanate prepolymer and a curing agent. The golf club (,) is preferably a putter, however, it may be a wood or an iron. The particular thermosetting polyurethane provides a soft striking face for feel and a good rebound for distance. The weight body (,) is preferably composed of a tungsten alloy, and the isolation layer (,) is preferably composed of a thermoplastic polyurethane.

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San Diego, CA, United States of America

Augustin W Rollison