US4455022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Master shaft and method of making golf club shafts therefrom
Assignee: WSD Corp A FLA CORP
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Filing: 1981-11-09
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Granted: 1984-06-19
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Expires: 2001-11-09
Abstract
Abstract A hollow, tapered master shaft is made of glass fiber cloth impregnated with synthetic polyester resin and has a length of about 55 inches, a wall thickness of about 0.03-0.06 inch, a butt end outside diameter of about 0.80-0.88 inch and a tip end outside diameter of about 0.35-0.42 inch. A golf club shaft is made from this master shaft by cutting away a portion of the length of the master shaft, from one or both ends, to derive the desired length, flexure and butt and tip dimensions.
Inventors
- 👤 Donald Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:24
CPC Classifications
A; A63; A63B; A63B53/00; A63B53/10; A63B60/00; A63B2209/00; A63B2209/02; A63B60/0081; A63B60/06; A63B60/08; A63B60/10; Y; Y10; Y10S; Y10S273/00; Y10S273/07; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1314
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
85 words
The method of making a golf club shaft, comprising forming a hollow, tapered master shaft of glass fiber impregnated with synthetic polyester resin and having an operative length of 55 inches, a wall thickness of 0.03-0.06 inch, a butt end having an outside diameter of 0.80-0.88 inch and a tip end having an outside diameter of 0.35-0.42 inch, and removing a portion of thelength of said master shaft from one or both ends thereof to produce a golf club shaft of predetermined length and flexure.
Claim 2
Independent Claim
85 words
The method of making a golf club shaft, comprising forming a hollow, tapered master shaft of glass fiber impregnated with synthetic polyester resin and having an operative length of 55 inches, a wall thickness of 0.03-0.06 inch, a butt end having an outside diameter of 0.80-0.88 inch and a tip end having an outside diameter of 0.35-0.42 inch, and removing a portion of thelength of said master shaft from one or both ends thereof to produce a golf club shaft of predetermined length and flexure.
Claim 3
Dependent Claim
29 words
The method of claim 1 wherein the removed portion of the master shaft is from the butt end only, whereby to produce a golf club shaft of maximum flexure.
Claim 4
Dependent Claim
29 words
The method of claim 1 wherein the removed portion of the master shaft is from the tip end only, whereby to produce a golf club shaft of minimum flexure.
Claim 5
Dependent Claim
36 words
The method of claim 1 wherein the removed portion of the master shaft is from both butt and tip ends, whereby to produce a golf club shaft of predetermined flexure intermediate the maximum and minimum flexures.
Claim 6
Dependent Claim
55 words
For use in making a golf club shaft, a hollow, tapered master shaft of glass fiber impregnated with synthetic polyester resin having an operative length of 55 inches, a wall thickness of 0.03-0.06 inch, a butt end having an outside diameter of 0.08-0.88 inch and a tip end having an outside diameter of 0.35-0.42 inch.
Claim 7
Dependent Claim
55 words
For use in making a golf club shaft, a hollow, tapered master shaft of glass fiber impregnated with synthetic polyester resin having an operative length of 55 inches, a wall thickness of 0.03-0.06 inch, a butt end having an outside diameter of 0.08-0.88 inch and a tip end having an outside diameter of 0.35-0.42 inch.
Claim 8
Dependent Claim
34 words
The master shaft of claim 5 wherein the wall thickness is 0.036 inch, the outside diameter of the butt end is 0.825 inch and the outside diameter of the tip end is 0.375 inch.
References Cited (Backward Citations)
US1594801A
Cited
US2934345A
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US3313541A
Cited
GB1246539A
Cited
US3963236A
Cited
US4122593A
Cited
US4240631A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-19 | 1987-12-19 | 1988-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-19 | 1991-12-19 | 1992-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-19 | 1995-12-19 | 1996-06-19 | $7700.00 | Window Closed / Lapsed |