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US 6,409,960 B1Granted
Methods of manufacturing golf club shafts
AssigneeCallaway Golf Company
InventorsThomas W. Preece, Herb Reyes
Life of this patent
Estimating the term…
Abstract
An improved shaft for a golf club and methods of manufacturing the same. One or more layers of a loaded film are used to define in part the overall weight, swing weight, and/or balance point of a golf club shaft, without significantly affecting the flexibility and/or torsional characteristics of the shaft. A set of plies of pre-preg composite fiber sheet and loaded film may be wrapped in a predetermined manner around a mandrel, placed in a mold, and heated for a predetermined period of time to form a shaft for a golf club.
Claims8
A method of manufacturing a shaft for a golf club, the method comprising:
- providing a mandrel having a proximal and a distal tip, wrapping a plurality of plies of pre-preg composite sheet around the mandrel and wrapping at least one ply of loaded film comprising a weighting agent around the mandrel starting at a point from between 19.5 inches to 29 inches from the distal tip in a predetermined manner, and
- heating the wrapped mandrel at a temperature from between 250° to 800° F. for up to 1.5 hours to allow a resin comprising the plies of pre-preg composite sheet and loaded film to cure.
Dependencies are inferred from the claim text.