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US 5,042,805 AGranted
Sports implements with a long handle or portion
AssigneeNisso Ltd.
InventorYoshinaga Nakai
Life of this patent
Estimating the term…
Abstract
A golf club includes a grip, shaft, and head. Within the shaft is disposed a spiral groove in which is disposed a coiled spring formed of a shape-memorizing alloy. Epoxy resin fills the groove and overlies the spring. The spring increases the strength of the shaft.
Claims4
In a golf club comprising a grip, a shaft and a head, the improvement comprising a spiral groove formed in said shaft and a coiled spring, formed of a shape-memorizing alloy, disposed in said groove, said groove being filled with an epoxy resin which overlies said coiled spring.
Dependencies are inferred from the claim text.