Structure of golf club shaft and method of producing the shaft
Patent 5028464 Issued on July 2, 1991. Estimated Expiration Date: 
October 3, 2009. 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.
October 3, 2009. 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 3771973 Golf club shaft and method of manufacture Patent #: 4757997 InventorAssigneeApplicationNo. 416381 filed on 10/03/1989US Classes:428/35.9, Three or more layers (continuous layer)74/557, Handles156/173, Winding about subsequently removed core or mandrel156/189, About irregular or configured mandrel surface156/190, Sequential winding of separate webs428/36.1, Textile, fabric, cloth, or pile containing (e.g., web, net, woven, knitted, mesh, nonwoven, matted, etc.)428/36.3, Fiber or fibers wound around each other or into a self-sustaining shape (e.g., yarn, braid, fibers shaped around a core, etc.)473/321And metalExaminersPrimary: Seidleck, James J.Assistant: Nold, Charles Attorney, Agent or FirmInternational ClassA63B 053/12Foreign Application Priority Data1988-10-04 JPAbstractA golf club shaft comprises a laminated tube constituting a main body of the shaft which is wound around the outer periphery of a mandrel, a transparent metallic layer wound around the outer periphery of the laminated tube and a resin coat such as epoxy resin formed on the outer periphery of the transparent metallic layer. The laminated tube is composed of a plurality of cloth prepreg sheets having different fiber orientations when wound around the mandrel. The transparent metallic layer is composed of a cloth prepreg sheet and a metallic surface. The cloth prepreg sheet is formed of a cloth of organic and/or inorganic fibers, which is made transparent after molding treatment, and formed by plating or depositing, on one surface of the cloth, metal such as titanium or the like and by impregnating epoxy resin or other thermosetting or thermoplastic resin into the thus formed cloth. The transparent metallic layer is wound around the laminated tube with the metallic surface disposed inside to oppose to the outer surface of the laminated tube. The resin coat is applied on the outer peripheral surface of the transparent metallic layer after grinding the surface as occasion demands.Field of SearchThree or more layers (continuous layer)Fiber or fibers wound around each other or into a self-sustaining shape (e.g., yarn, braid, fibers shaped around a core, etc.) Multilayer (continuous layer) Textile, fabric, cloth, or pile containing (e.g., web, net, woven, knitted, mesh, nonwoven, matted, etc.) Of metal Electroplating Sprayed metal Vapor deposition or gas diffusion About irregular or configured mandrel surface Sequential winding of separate webs With additional assembly (other than winding) Winding about subsequently removed core or mandrel | |
