초록 ▼

A novel golf shaft and its method of fabrication is disclosed. The shaft comprises a tapered, scrolled, oblong blank of thin laminated sheet material having alternating laminae of woven glass fabric and resin impregnated unidirectional graphite fibers. The fibers are arranged in a predetermined spec

A novel golf shaft and its method of fabrication is disclosed. The shaft comprises a tapered, scrolled, oblong blank of thin laminated sheet material having alternating laminae of woven glass fabric and resin impregnated unidirectional graphite fibers. The fibers are arranged in a predetermined specific angle of orientation with respect to the longitudinal axis of the shaft.

대표청구항 ▼

A method of forming a tubular golf shaft having narrow range bending and torsional deflections from a sheet of unidirectional resin impregnated graphite fiber and a sheet of woven glass fabric comprising the steps of: cutting said sheet of resin impregnated unidirectional graphite fiber to a predete

A method of forming a tubular golf shaft having narrow range bending and torsional deflections from a sheet of unidirectional resin impregnated graphite fiber and a sheet of woven glass fabric comprising the steps of: cutting said sheet of resin impregnated unidirectional graphite fiber to a predetermined flat pattern constituting a first layer having the fibers oriented at an angle ranging from about +13°to +26°with respect to the major axis of the predetermined flat pattern; cutting said sheet of glass cloth to the same predetermined flat pattern and the same size as said resin impregnated fiber sheet and having the fibers of the cloth oriented at an angle ranging from about ±40°to about ±50°with respect to the major axis of the pattern, thereby forming a third layer; cutting said resin impregnated unidirectional fiber sheet material to the same predetermined flat pattern and the same size of said first layer thereby forming a second layer, said second layer having the fibers oriented at an angle ranging between about -13°to about -26°with respect to the major axis of the predetermined flat pattern; arranging said glass and fiber layers in alternating fashion with the glass layer interposed between the graphite fiber layers thereby forming an oblong blank of laminated material; wrapping said oblong blank of laminated material around a mandrel; heating said assembly of wrapped laminated material and mandrel to a temperature sufficient to cause the resin in the layers to fuse, thereafter allowing the fused material to cool and removing the mandrel.