Large-tip composite golf shaft
Patent 5093162 Issued on March 3, 1992. Estimated Expiration Date: 
April 30, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 30, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3313541 Golf club shaft Golf shaft and method of making same Construction for a fiber reinforced shaft Golf shaft and method of making same Golf shaft having controlled flex zone Master shaft and method of making golf club shafts therefrom Golf club shaft and method of manufacture Patent #: 4757997 InventorsAssigneeApplicationNo. 516934 filed on 04/30/1990US Classes:428/34.5, Contains fabric, fiber particle, or filament made of glass, ceramic, or sintered, fused, fired, or calcined metal oxide, or metal carbide or other inorganic compound (e.g., fiber glass, mineral fiber, sand, etc.)138/130, Oppositely wound138/132, Embedded138/144, Spirally wound layer156/188, Sequential winding of separate webs156/190, Sequential winding of separate webs428/34.7, Polymer or resin containing (i.e., natural or synthetic)428/368, In coating or impregnation473/319Filament (e.g., fiber, etc.) or sheet wrapped about shaft longitudinal axisExaminersPrimary: Seidleck, James J.Assistant: Nold, Charles Attorney, Agent or FirmForeign Patent References
International ClassesB32B 005/12A63B 053/10 B65H 081/00 AbstractA composite golf club shaft and the method of constructing the shaft is disclosed. The hollow circular shaft includes a standard butt end having a constant outside diameter along a length of the shaft and a tip end having a constant outside diameter sustantially larger than the tip of a standard shaft, with the constant diameter of the tip end and butt end extending along predetermined lengths of the shaft. An intermediate section of the shaft tapers between the diameters of the butt and tip ends. The shaft is manufactured by wrapping a group of circumferential sections about a mandrel, each layer comprising either standard modulus carbon-graphite fibers or fiberglass fibers in a matrix, with the finished product being heat-cured to produce a golf club shaft.Field of SearchContains fabric, fiber particle, or filament made of glass, ceramic, or sintered, fused, fired, or calcined metal oxide, or metal carbide or other inorganic compound (e.g., fiber glass, mineral fiber, sand, etc.)Polymer or resin containing (i.e., natural or synthetic) Three or more layers (continuous layer) Fibers Including free carbon or carbide or therewith (not as steel) In coating or impregnation SELF-SUSTAINING CARBON MASS OR LAYER WITH IMPREGNANT OR OTHER LAYER Tubular core Sequential winding of separate webs About irregular or configured mandrel surface Sequential winding of separate webs With additional assembly (other than winding) Prior to winding Oppositely wound Embedded Distinct layers Spirally wound layer | |
