IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0456326
(2009-06-15)
|
등록번호 |
US-8157669
(2012-04-17)
|
발명자
/ 주소 |
- Hulock, Richard P.
- Pergande, Jon C.
- Thurman, Robert T.
|
출원인 / 주소 |
- Wilson Sporting Goods Co.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
15 |
초록
▼
A shaft for a golf club having a total length and a total weight. The shaft includes first and second tubular portions. The first and second tubular portions are formed of first and second materials, respectively. The second tubular portion has a proximal end and a tip end. The tip end has an outsid
A shaft for a golf club having a total length and a total weight. The shaft includes first and second tubular portions. The first and second tubular portions are formed of first and second materials, respectively. The second tubular portion has a proximal end and a tip end. The tip end has an outside diameter of less than 0.400 inches. The distal end of the first tubular portion is co-cured to the proximal end of the second tubular portion. The shaft has a resistance to twisting about a longitudinal axis of the shaft, when tested under a torsional stability test and measured at an approximate midpoint of the total length of the shaft, of less than 2.0 degrees in a torsional stability test. The shaft when measured from the tip end of the shaft in a balance point test device has a balance point of less than 46 percent.
대표청구항
▼
1. A shaft for an iron or wood golf club, the shaft having a longitudinal axis and capable of being tested under a torsional stability test device, the test device having a first support and a torsional load applicator, the shaft comprising: a first tubular portion formed of a first material, the fi
1. A shaft for an iron or wood golf club, the shaft having a longitudinal axis and capable of being tested under a torsional stability test device, the test device having a first support and a torsional load applicator, the shaft comprising: a first tubular portion formed of a first material, the first tubular portion having a butt end and a distal end, the distal end of the first tubular portion having an inside diameter, D2′; anda second tubular portion formed of a second material different from the first material, the second tubular portion having a proximal end and a tip end, the tip end having an outside diameter of less than 0.400 inches and the proximal end of the second tubular portion having an outside diameter, D3, the outside diameter, D3, is greater than the inside diameter, D2′, such that a mechanical lock is achieved when the inner surface of the distal end of the first tubular portion engage the outer surface of the proximal end of the second tubular portion;the shaft having a resistance to twisting about the longitudinal axis of the shaft of less than 2.5 degrees, when measured in the torsional stability test device at a point 20 inches from the first support along an exposed length of the shaft, wherein the first support is fixedly secured to approximately 2.25 inches of the shaft at the tip end of the first tubular portion, and wherein the torsional load applicator applies a 1 ft-lb torque to the butt end of the second tubular portion of the shaft, the shaft having a weight within the range of 45 to 95 grams. 2. The shaft of claim 1 wherein the shaft has a resistance to twisting about the longitudinal axis of the shaft of less than 2.0 degrees in the torsional stability test, when measured at the point 20 inches from the first support along the exposed length of the shaft. 3. The shaft of claim 1 wherein the shaft when measured from the tip end of the shaft in a balance point test device has a balance point of less than 50 percent. 4. The shaft of claim 1 wherein the shaft when measured from the tip end of the shaft in a balance point test device has a balance point of less than 46 percent. 5. The shaft of claim 1, wherein the first material is a composite material includes multiple fiber layers, wherein each fiber layer includes a plurality of unidirectional or woven fibers, and wherein the fibers are selected from the group consisting of carbon, glass, basalt, boron, carrot, hemp, Kevlar®, Spectra® and combinations thereof. 6. The shaft of claim 5, wherein the inner most layer of the first tubular portion at or adjacent to the distal end is a glass fiber layer. 7. The shaft of claim 1, wherein the second material is selected from the group consisting of steel, aluminum, titanium, scandium and combinations thereof. 8. The shaft of claim 1 wherein the first tubular portion near the distal end and the second tubular portion near the proximal end each have corresponding tapered constructions such that the second tubular portion cannot extend entirely through the first tubular portion, and wherein the first tubular portion is co-cured over at least a portion of the second tubular portion. 9. The shaft of claim 1 wherein the shaft has a weight within the range of 45 to 95 grams. 10. The shaft of claim 1 wherein the shaft has a resistance to twisting about the longitudinal axis of the shaft of less than 2.0 degrees in the torsional stability test, when measured at a point 28 inches from the first support along the exposed length of the shaft. 11. A shaft for a golf club, the shaft having a total length and comprising: a first hollow tubular portion formed of a first composite material, the first tubular portion having a butt end region and a tapered distal end region, the first composite material including an galvanic corrosion inhibitor layer positioned as the innermost layer of at least a portion of the tapered distal end region, the first tubular portion extending over at least forty percent of the total length of the shaft; anda second hollow tubular portion formed of a second metallic material, the second tubular portion having a tapered proximal end region and a tip end region, at least a portion of the outer surface of the tapered proximal end region being roughened, the first composite material of the first tubular portion being co-cured to the outer surface of the tapered proximal end region of the second tubular portion, the second tubular portion extending over at least forty percent of the total length of the shaft, the first tubular portion overlapping the second tubular portion to form an overlapped region, the overlapped region being at least one inch and less than four inches in length. 12. The shaft of claim 11 wherein the overlapped region has a length within the range of 2.0 to 2.5 inches. 13. The shaft of claim 11, wherein the shaft when measured from the tip end of the shaft in a balance point test device has a balance point of less than 50 percent. 14. The shaft of claim 11, wherein the shaft when measured from the tip end of the shaft in a balance point test device has a balance point of less than 46 percent. 15. The shaft of claim 11, wherein the first composite material includes multiple fiber layers, wherein each fiber layer includes a plurality of unidirectional or woven fibers, and wherein the fibers are selected from the group consisting of carbon, glass, basalt, boron, carrot, hemp, Kevlar®, Spectra® and combinations thereof. 16. The shaft of claim 15, wherein the galvanic corrosion inhibitor layer is the inner most layer of the first tubular portion at or adjacent to the distal end, and wherein the inner most layer is a glass fiber layer. 17. The shaft of claim 11, wherein the second metallic material is selected from the group consisting of steel, aluminum, titanium, scandium and combinations thereof. 18. The shaft of claim 11, wherein the first composite material of the first tubular portion is co-cured to the outer surface of the tapered proximal end region of the second tubular portion without the use of a separate adhesive. 19. The shaft of claim 11 wherein the shaft has a weight within the range of 45 to 95 grams. 20. The shaft of claim 11, wherein the diameter of the second tubular portion at the tip end is within the range of 0.325 to 0.400 inches. 21. The shaft of claim 11, further comprising a protective ferrule positioned adjacent the distal end of the first tubular portion and about the second tubular portion. 22. The shaft of claim 11, wherein the shaft is configured for organized, competitive play. 23. The shaft of claim 11, wherein the shaft is capable of being tested under a torsional stability test device having a first support and a torsional load applicator, wherein the tip end region has an outside diameter of less than 0.400 inches, wherein the shaft has a resistance to twisting about the longitudinal axis of the shaft of less than 2.5 degrees, when measured in the torsional stability test device at a point 20 inches from the first support along an exposed length of the shaft, wherein the first support is fixedly secured to approximately 2.25 inches of the shaft at the tip end region of the first tubular portion, wherein the torsional load applicator applies a 1 ft-lb torque to the butt end of the second tubular portion of the shaft, and wherein the shaft has a weight within the range of 45 to 95 grams. 24. The shaft of claim 23 wherein the shaft has a resistance to twisting about the longitudinal axis of the shaft of less than 2.0 degrees in the torsional stability test, when measured at the point 20 inches from the first support along the exposed length of the shaft. 25. The shaft of claim 23 wherein the shaft has a resistance to twisting about the longitudinal axis of the shaft of less than 2.0 degrees in the torsional stability test, when measured at a point 28 inches from the first support along the exposed length of the shaft. 26. The shaft of claim 11, wherein the tapered proximal end region of the second tubular portion has an outside diameter that tapers in the overlapped region in a direction from a proximal end of the proximal end region toward the tip end region within a range of 0.010 to 0.015 inch. 27. A golf club comprising: a shaft including a first tubular portion formed of a first material and a second tubular portion formed of a second material, the first tubular portion having a butt end and a distal end, the second tubular portion having a proximal end and a tip end, the distal end of the first tubular portion coupled to the proximal end of the second tubular portion, the first tubular portion having a weight of within the range of 1.1 to 1.75 grams/inch, and the second tubular portion having a weight within the range of 2.0 to 2.8 grams/inch, the shaft having a balance point of less than 46 percent when measured from the tip end in a balance point test device;a club head coupled to the tip end of the second tubular portion; anda grip attached to the first tubular portion. 28. The golf club of claim 27, wherein the golf club has a length within the range of 37.0 to 38.5 inches, wherein the club head has a loft angle of 26 to 34 degrees, wherein the golf club having a swing weight rating within the range of C8 to D4 and a total weight within the range of 355 to 385 grams, and a club head weight within the range of 234.5 to 264.5 grams. 29. The golf club of claim 27, wherein the golf club has a length within the range of 38.5 to 40.0 inches, wherein the club head has a loft angle of 16 to 24 degrees, wherein the golf club having a swing weight rating within the range of C8 to D4 and a total weight within the range of 340 to 370 grams, and a club head weight within the range of 218.0 to 248.0 grams. 30. The golf club of claim 27, wherein the golf club has a length within the range of 35.5 to 37.0 inches, wherein the club head has a loft angle of 38 to 46 degrees, wherein the golf club having a swing weight rating within the range of C8 to D4 and a total weight within the range of 385 to 415 grams, and a club head weight within the range of 263.0 to 293.0 grams. 31. The golf club of claim 27, wherein the golf club has a length within the range of 38.5 to 41.5 inches, wherein the club head has a loft angle of 18 to 27 degrees, wherein the golf club having a swing weight rating within the range of C8 to D4 and a total weight within the range of 335 to 365 grams, and a club head weight within the range of 215.0 to 245.0 grams. 32. The golf club of claim 27 wherein the first tubular portion overlaps the second tubular portion to form an overlapped region, and wherein the overlapped region has a length within the range of 2.0 to 2.5 inches. 33. The golf club of claim 27, wherein the first composite material includes multiple fiber layers, wherein each fiber layer includes a plurality of unidirectional or woven fibers, and wherein the fibers are selected from the group consisting of carbon, glass, basalt, boron, carrot, Kevlar®, Spectra® and combinations thereof. 34. The golf club of claim 27, wherein the inner most layer of the first tubular portion at or adjacent to the distal end is a glass fiber layer. 35. The golf club of claim 27, wherein the second metallic material is selected from the group consisting of steel, aluminum, titanium, scandium and combinations thereof. 36. The golf club of claim 27, wherein the first composite material of the first tubular portion being applied about and cured to the outer surface of the tapered proximal end region of the second tubular portion. 37. The golf club of claim 27, further comprising a protective ferrule positioned adjacent the distal end of the first tubular portion and about the second tubular portion. 38. The golf club of claim 27, wherein the shaft is configured for organized, competitive play. 39. The shaft of claim 11, wherein the distal end region of the first tubular portion has an inside diameter, D2′, wherein the proximal end region of the second tubular portion having an outside diameter, D3, wherein the outside diameter, D3, is greater than the inside diameter, D2′, such that a mechanical lock is achieved when the inner surface of the distal end region of the first tubular portion overlaps the outer surface of the proximal end of the second tubular portion. 40. The shaft of claim 39, wherein the first tubular portion near the distal end region and the second tubular portion near the proximal end region each have corresponding tapered constructions such that the second tubular portion cannot extend entirely through the first tubular portion.
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