A golf shaft which features lightness, high crushing strength and high torsion strength with no interlayer peeling, as well as an excellent aesthetic design with a three-dimensional effect which gives the user a sense of depth, and a method for forming the same and a golf club using the same. The go
A golf shaft which features lightness, high crushing strength and high torsion strength with no interlayer peeling, as well as an excellent aesthetic design with a three-dimensional effect which gives the user a sense of depth, and a method for forming the same and a golf club using the same. The golf shaft is produced by baking a plurality of fiber prepreg layers. The shaft is a laminate comprising: a main layer of resin-impregnated high-strength high-elasticity fiber; a metal wire layer laid over the main layer; and a layer of low-elasticity fiber, laid over the metal wire layer, impregnated with resin through which the underlying metal wire layer can be seen.
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1. A golf shaft produced by baking a plurality of fiber prepreg layers, the shaft being a laminate comprising:a main layer consisting of resin-impregnated high-strength high-elasticity fiber; a metal wire layer laid over the main layer, wherein the metal wire layer comprises a first metal wire layer
1. A golf shaft produced by baking a plurality of fiber prepreg layers, the shaft being a laminate comprising:a main layer consisting of resin-impregnated high-strength high-elasticity fiber; a metal wire layer laid over the main layer, wherein the metal wire layer comprises a first metal wire layer and a second metal wire layer with a transparent layer disposed between the first and second metal wire layers, wherein the first metal wire layer is helically winded around the shaft and the second metal wire layer is helically winded over the first metal wire layer to form the metal wire layer; and a layer of low-elasticity fiber, laid over the metal wire layer, impregnated with resin through which the underlying metal wire layer can be seen; wherein a material layer forming an outermost protective surface overlying the second metal wire layer is in contact with the transparent layer, wherein the transparent layer is disposed across opposing planar faces of the first metal wire layer and the second metal wire layer and contacts the main layer in spaces between the first metal wire layer and contacts the layer of low-elasticity fiber layer in spaces between the second metal wire layer. 2. The golf shaft as claimed in claim 1, wherein the low-elasticity fiber layer is made of glass fiber prepreg.3. The golf shaft as claimed in claim 1, wherein the metal wire layer is located near to the grip area along the length of the golf shaft.4. A golf club consisting of a head set on one end of the golf shaft as claimed in claim 1 and a grip covering the other end, wherein the metal wire layer lies somewhere in the uncovered area between the head and the grip.5. A golf shaft produced by baking a plurality of fiber prepreg layers, the shaft being a laminate comprising:a main layer consisting of resin-impregnated high-strength high-elasticity fiber; a metal wire layer laid over the main layer, which consists of metal wires aligned bias with respect to the axis of the main layer, wherein the metal wire layer comprises a first metal wire layer and a second metal wire layer with a transparent layer disposed between the first and second metal wire layers, wherein the first metal wire layer is helically winded around the shaft and the second metal wire layer is helically winded over the first metal wire layer to form the metal wire layer; and a layer of low-elasticity fiber, laid over the metal wire layer, impregnated with resin through which the underlying metal wire layer can be seen, wherein the metal wire layer is formed in a discrete section along a length of the shaft adjacent a grip section of the shaft. 6. The golf shaft as claimed in claim 5, wherein the low-elasticity fiber layer is made of glass fiber prepreg.7. The golf shaft as claimed in claim 5, wherein the metal wires are spaced with a spacing 0.5 to 2 times as large as the wire width.8. The golf shaft as claimed in claim 5, wherein the metal wire layer is located near to the grip area along the length of the golf shaft.9. A golf shaft produced by baking a plurality of fiber prepreg layers, the shaft being a laminate comprising: a main layer consisting of resin-impregnated high-strength high-elasticity fiber; a metal wire layer laid over the main layer; and a layer of low-elasticity fiber, laid over the metal wire layer, impregnated with resin through which the underlying metal wire layer can be seen, the metal wire layer comprising: a first metal wire layer which consists of metal wires spaced and aligned bias with respect to the axis of the main layer; a transparent layer, laid over the first metal wire layer, which covers it with transparent material with a prescribed thickness; a second metal wire layer, laid over the transparent layer, which consists of metal wires spaced and aligned in the bias direction opposite to the first metal wire layer, wherein the metal wire layer is formed in a discrete section along a length of the shaft between a grip section of the shaft and another shaft section that is free of metal wires, wherein the first metal wire layer is helically winded around the shaft and the second metal wire layer is helically winded over the first metal wire layer to form the metal wire layer.10. The golf shaft as claimed in claim 9, wherein the low-elasticity fiber layer is made of glass fiber prepreg.11. The golf shaft as claimed in claim 9, wherein the transparent layer has a thickness from 10 μm to 100 μm.12. The golf shaft as claimed in claim 9, wherein the transparent layer is made of glass fiber prepreg impregnated with resin having the same quality as the resin used in the main layer.13. The golf shaft as claimed in claim 9, wherein the metal wire layer is located near to the grip area along the length of the golf shaft.14. The golf shaft as claimed in claim 9, wherein the first metal wire layer and the second metal wire layer are located near to the grip area along the length of the golf shaft.15. A golf shaft produced by baking a plurality of fiber prepreg layers, the shaft being a laminate comprising: a main layer consisting of resin-impregnated high-strength high-elasticity fiber; a metal wire layer, laid over the main layer, which consists of metal wires aligned bias with respect to the axis of the main layer; and a layer of low-elasticity fiber, laid over the metal wire layer, impregnated with resin through which the underlying metal wire layer can be seen, metal wire layer comprising: first metal wire layer which consists of metal wires spaced and aligned bias with respect to the axis of the main layer; transparent layer, laid over the first metal wire layer, which covers it with transparent material with a prescribed thickness; second metal wire layer, laid over the transparent layer, which consists of metal wires spaced and aligned in the bias direction opposite to the first metal wire layer, wherein a material layer forming an outermost protective surface overlying the second metal wire layer is in contact with the transparent layer, wherein the first metal wire layer is helically winded around the shaft and the second metal wire layer is helically winded over the first metal wire layer to form the metal wire layer, wherein the transparent layer is disposed across opposing planar faces of the first metal wire layer and the second metal wire layer and contacts the main layer in spaces between the first metal wire layer and contacts the layer of low-elasticity fiber layer in spaces between the second metal wire layer.16. The golf shaft as claimed in claim 15, wherein the low-elasticity fiber layer is made of glass fiber prepreg.17. The golf shaft as claimed in claim 15, wherein the transparent layer has a thickness from 10 μm to 100 μm.18. The golf shaft as claimed in claim 15, wherein the transparent layer is made of glass fiber prepreg impregnated with resin having the same quality as the resin used in the main layer.19. The golf shaft as claimed in claim 15, wherein the metal wires are spaced with a spacing 0.5 to 2 times as large as the wire width.20. The golf shaft as claimed in claim 15, wherein the metal wire layer is located near to the grip area along the length of the golf shaft.21. The golf shaft as claimed in claim 15, wherein the first metal wire layer and the second metal wire layer are located near to the grip area along the length of the golf shaft.22. A golf shaft produced by baking a plurality of fiber prepreg layers, the shaft being a laminate comprising: a main layer consisting of resin-impregnated high-strength high-elasticity fiber; a metal wire layer laid over the main layer; and a layer of low-elasticity fiber, laid over the metal wire layer, impregnated with resin through which the underlying metal wire layer can be seen, metal wire layer comprising: first metal wire layer which consists of flat metal wires spaced and aligned bias with respect to the axis of the main layer; transparent layer, laid over the first metal wire layer, which covers it with transparent material with a prescribed thickness; second metal wire layer, laid over the transparent layer, which consists of flat metal wires spaced and aligned in the bias direction opposite to the first metal wire layer; wherein a material layer forming an outermost protective surface overlying the second metal wire layer is in contact with the transparent layer, wherein the first metal wire layer is helically winded around the shaft and the second metal wire layer is helically winded over the first metal wire layer to form the metal wire layer, wherein the transparent layer is disposed across opposing planar faces of the first metal wire layer and the second metal wire layer and contacts the main layer in spaces between the flat metal wires of the first metal wire layer and contacts the layer of low-elasticity fiber layer in spaces between the flat metal wires of the second metal wire layer.23. The golf shaft as claimed in claim 22, wherein the low-elasticity fiber layer is made of glass fiber prepreg.24. The golf shaft as claimed in claim 22, wherein the transparent layer has a thickness from 10 μm to 100 μm.25. The golf shaft as claimed in claim 22, wherein the transparent layer is made of glass fiber prepreg impregnated with resin having the same quality as the resin used in the main layer.26. The golf shaft as claimed in claim 22, wherein the metal wires are spaced with a spacing 0.5 to 2 times as large as the wire width.27. The golf shaft as claimed in claim 22, wherein the metal wire layer is located near to the grip area along the length of the golf shaft.28. The golf shaft as claimed in claim 22, wherein the first metal wire layer and the second metal wire layer are located near to the grip area along the length of the golf shaft.29. A golf shaft produced by baking a plurality of fiber prepreg layers, the shaft being a laminate comprising: a main layer consisting of resin-impregnated high-strength high-elasticity fiber; a metal wire layer, laid over the main layer, which consists of metal wires aligned bias with respect to the axis of the main layer; and a layer of low-elasticity fiber, laid over the metal wire layer, impregnated with resin through which the underlying metal wire layer can be seen, metal wire layer comprising: a first metal wire layer which consists of flat metal wires spaced and aligned bias with respect to the axis of the main layer; a transparent layer, laid over the first metal wire layer, which covers it with transparent material with a prescribed thickness; a second metal wire layer, laid over the transparent layer, which consists of flat metal wires spaced and aligned in the bias direction opposite to the first metal wire layer, wherein the metal wire layer is formed in a discrete section along a length of the shaft between a grip section of the shaft and another shaft section that is free of metal wires, wherein the space between the flat metal wires is about 0.5 to 2 times as large as a width of the metal wires, wherein the first metal wire layer is helically winded around the shaft and the second metal wire layer is helically winded over the first metal wire layer to form the metal wire layer.30. The golf shaft as claimed in claim 29, wherein the low-elasticity fiber layer is made of glass fiber prepreg.31. The golf shaft as claimed in claim 29, wherein the transparent layer has a thickness from 10 μm to 100 μm.32. The golf shaft as claimed in claim 29, wherein the transparent layer is made of glass fiber prepreg impregnated with resin having the same quality as the resin used in the main layer.33. The golf shaft as claimed in claim 29, wherein the metal wire layer is located near to the grip area along the length of the golf shaft.34. The golf shaft as claimed in claim 29, wherein the first metal wire layer and the second metal wire layer are located near to the grip area along the length of the golf shaft.35. A golf shaft forming method comprising the steps of: making a main layer by winding resin-impregnated high-strength, high-elasticity fiber on a tapered mandrel; winding a first glass prepreg having aligned flat metal wires bonded to it, on the larger diameter side of the main layer with the metal wires inside; and winding a second glass prepreg having spaced and aligned flat metal wires bonded to glass fiber prepreg, on the first glass prepreg with the flat metal wires inside, wherein the flat metal wires are formed in a discrete section along a length of the shaft between a grip section of the shaft and another shaft section that is free of metal wires.36. A golf shaft forming method comprising the steps of: making a main layer by winding resin-impregnated high-strength, high-elasticity fiber on a tapered mandrel; winding a laminate sheet having aligned metal wires between a prepreg made of the same material as the main layer and a glass fiber prepreg, on the larger diameter side of the main layer with the glass fiber prepreg inside; and winding a second glass prepreg having spaced and aligned flat metal wires bonded to glass fiber prepreg, on the laminate sheet, with the flat metal wires inside, wherein the flat metal wires are formed in a discrete section along a length of the shaft between a grip section of the shaft and another shaft section that is free of metal wires.37. A golf shaft forming method comprising the steps of: making a main layer by winding resin-impregnated high-strength, high-elasticity fiber on a tapered mandrel; winding a laminate sheet having aligned metal wires between a prepreg made of the same material as the main layer and a glass fiber prepreg, on the larger diameter side of the main layer with the glass fiber prepreg outside; and winding a glass sheet having spaced and aligned flat metal wires between two glass fiber prepregs, on the laminate prepreg, wherein the metal wires are formed in a discrete section along a length of the shaft between a grip section of the shaft and another shaft section that is free of metal wires.38. A golf shaft produced by baking a plurality of fiber prepreg layers, the shaft being a laminate comprising:a main layer consisting of resin-impregnated high-strength high-elasticity fiber; a metal wire layer laid over the main layer; and a layer of low-elasticity fiber, laid over the metal wire layer, impregnated with resin through which the underlying metal wire layer can be seen, the metal wire layer including: a first metal wire layer formed of metal wires spaced and having a first orientation with respect to a main axis of the main layer; a second metal wire layer formed of metal wires spaced and having a second orientation with respect to the main axis, the second orientation being different than the first orientation, wherein the second metal wire layer is spaced apart from the first metal wire layer by another layer formed therebetween, wherein the metal wires are formed in a discrete section along a length of the shaft between a grip section of the shaft and another shaft section that is free of metal wires, wherein the first metal wire layer is helically winded around the shaft and the second metal wire layer is helically winded over the first metal wire layer to form the metal wire layer. 39. The golf shaft as claimed in claim 38, wherein the metal wires in the first orientation are aligned bias with respect to the axis and the metal wires in the second orientation are aligned in the bias direction opposite to the first metal wire layer.40. The golf shaft as claimed in claim 38, wherein the other layer between the metal wires layers comprises a transparent layer, laid over the first metal wire layer, which covers it with transparent material with a prescribed thickness.41. The golf shaft as claimed in claim 38, wherein the other layer between the metal wires layers comprises a transparent layer, laid over the first metal wire layer, which covers it with transparent material with a prescribed thickness.
Michael W. Perryman ; Patrick C. T. Hsu TW, Golf club shaft with controllable feel and balance using combination of fiber reinforced plastics and metal-coated fiber-reinforced plastics.
Palumbo,Gino; McCrea,Jonathan; Tomantschger,Klaus; Brooks,Iain; Jeong,Daehyun; Limoges,Dave; Panagiotopoulos,Konstantinos; Erb,Uwe; Wang,Andrew, Article comprising a fine-grained metallic material and a polymeric material.
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