Patent US3880422A successfully refreshed from Google Patents.
US3880422A
Expired / Lapsed
US
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Gymnastic pole and process of making same
Assignee: Flexi Dyne Inc
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Filing: 1973-05-07
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Granted: 1975-04-29
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Expires: 1993-05-07
Abstract
Abstract A fiberglass gymnastic pole and the method of designing and making it. The pole is hollow and formed by wrappings of different shapes and fiber orientation of fiberglass fabrics to vary the taper. The final product is wrapped in a thin polyvinyl fluoride sheath. The sheath is ultraviolet absorbant to retard degradation of the polymeric binder by solar radiation. Strain gages are utilized to optimize the design characteristics.
Inventors
- 👤 Robert Boggild
- 👤 William L Dale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:04
CPC Classifications
A; A63; A63B; A63B9/00; A63B2209/00; A63B2209/02; A63B2244/00; A63B2244/22; A63B2244/225; Y; Y10; Y10S; Y10S273/00; Y10S273/07
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
116 words
A fiberglass pole having a butt end adapted to be mounted in a socket and a tip at the end of said pole opposite said butt end, said pole Comprising, an elongated pole of circular cross section, the outside surface of said pole being tapered from butt end to tip, the outside surface of said pole at the lower portion adjacent said butt end having a taper of approximately .035 inch per foot, the central portion having a taper of approximately .045 inch per foot, the upper portion of said pole having a taper of approximately .070 inch per foot, the inside diameter of said pole having a uniform taper of approximately .038 inch per foot.
Claim 2
Dependent Claim
116 words
A fiberglass pole having a butt end adapted to be mounted in a socket and a tip at the end of said pole opposite said butt end, said pole Comprising, an elongated pole of circular cross section, the outside surface of said pole being tapered from butt end to tip, the outside surface of said pole at the lower portion adjacent said butt end having a taper of approximately .035 inch per foot, the central portion having a taper of approximately .045 inch per foot, the upper portion of said pole having a taper of approximately .070 inch per foot, the inside diameter of said pole having a uniform taper of approximately .038 inch per foot.
Claim 3
Dependent Claim
35 words
In a fiberglass pole having a plurality of predominantly longitudinally oriented fibers joined by a curable binder, the improvement comprising, a plastic sheath surrounding said pole, said sheath being a very flexible, ultraviolet-absorbent, polyvinyl fluoride.
Claim 4
Dependent Claim
35 words
In a fiberglass pole having a plurality of predominantly longitudinally oriented fibers joined by a curable binder, the improvement comprising, a plastic sheath surrounding said pole, said sheath being a very flexible, ultraviolet-absorbent, polyvinyl fluoride.
References Cited (Backward Citations)
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US2726185A
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US2749643A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |