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US 2003/0119598 A1Published application
Graphite shaft with foil modified torsion
AssigneeCallaway Golf Company
InventorJ. Andrew Galloway
Life of this patent
Estimating the term…
Abstract
Abstract of Disclosure An improved golf club shaft is disclosed. The golf club shaft includes a shaft body made of a composite material, such as carbon/epoxy, and a metal foil wrapped in a spiral pattern around at least a portion of the shaft body. The metal foil increases the torsional stiffness of the shaft and improves its bending stiffness, thereby enabling the first and second frequencies of a golf club employing the shaft to remain in a desired range.
Claims20
I claim as my invention:
- 1. A golf club shaft comprising:
- a shaft body;
- and
- a metal foil wrapped around at least a portion of the shaft body in a spiral pattern.
1 more element
A golf club comprising:
- a club head;
- and
- a shaft coupled to the club head, the shaft including a shaft body and a metal foil, the metal foil being wrapped around at least a portion of the shaft body, the metal foil forming a plurality of spirals along the portion of the shaft body.
A method for manufacturing a golf club shaft comprising:
- wrapping a plurality of pre-preg sheets around a mandrel to form a shaft body;
- wrapping a metal foil over at least one of the plurality of pre-preg sheets of the shaft body, the metal foil forming a plurality of spirals along at least a portion of the shaft body.
Dependencies are inferred from the claim text.