Patent US4301201A successfully refreshed from Google Patents.
US4301201A
Expired / Lapsed
US
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Ski pole shaft
Assignee: Trail Equipment Co Inc
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Filing: 1980-04-25
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Granted: 1981-11-17
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Expires: 2000-04-25
Abstract
Abstract A ski pole shaft defined by a tubular element formed of a plurality of continuous filaments extending substantially rectilinearly end to end of the element and spaced in an annular array about the axis of element. The filaments are embedded in a matrix of set synthetic resin and are maintained in a longitudinally stressed condition by the set resin so as to define a prestressed tubular shaft wall. The shaft wall may have an outer diameter of approximately 10 times the thickness of the wall. In one embodiment the wall has a thickness of approximately 0.07 inches. The filaments in the illustrated embodiment are stressed to approximately 5 to 10% of their breaking stress. The filaments in the illustrated embodiment comprise approximately 60 to 70% of the volume of shaft wall. The filaments may include filaments made of different materials and the different filaments may be selectively uniformly distributed in the annular array in the tubular wall. Alternatively the different material filaments may be arranged in radially related annular arrays. The outer surface of the tubular wall may be formed of the matrix material.
Inventors
- 👤 Thomas C. Stout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:21
CPC Classifications
A; A63; A63C; A63C11/00; A63C11/22; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1314; Y10T428/1352; Y10T428/1372; Y10T428/24; Y10T428/24132; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/249942; Y10T428/249946; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/2933; Y10T428/2964
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
109 words
A thin wall ski pole shaft comprising: a tubular element formed of a plurality of longitudinally stressed high tensile strength continuous filaments extending end to end of the element and spaced in an annular array about the axis of the element; and a matrix of set synthetic resin embedding said filaments, said filaments being maintained in the longitudinally stressed condition by said set resin matrix to define a longitudinally prestressed thin wall tubular shaft wall having a thickness in the range of approximately 0.05" to 0.10" and an outer diameter of approximately 10 times the thickness of the wall, said filaments comprising a major portion of the shaft wall.
Claim 2
Dependent Claim
109 words
A thin wall ski pole shaft comprising: a tubular element formed of a plurality of longitudinally stressed high tensile strength continuous filaments extending end to end of the element and spaced in an annular array about the axis of the element; and a matrix of set synthetic resin embedding said filaments, said filaments being maintained in the longitudinally stressed condition by said set resin matrix to define a longitudinally prestressed thin wall tubular shaft wall having a thickness in the range of approximately 0.05" to 0.10" and an outer diameter of approximately 10 times the thickness of the wall, said filaments comprising a major portion of the shaft wall.
Claim 3
Dependent Claim
15 words
The ski pole shaft of claim 1 wherein said filaments are formed of polyaramid resin.
Claim 4
Dependent Claim
17 words
The ski pole shaft of claim 1 wherein said shaft wall has a thickness of approximately 0.07".
Claim 5
Dependent Claim
18 words
The ski pole shaft of claim 3 wherein said shaft wall has an outer diameter of approximately 0.580".
Claim 6
Dependent Claim
21 words
The ski pole shaft of claim 1 wherein said filaments are stressed to approximately 5 to 10% of their breaking stress.
Claim 7
Dependent Claim
14 words
The ski pole shaft of claim 1 wherein said filaments are formed of glass.
Claim 8
Dependent Claim
15 words
The ski pole shaft of claim 1 wherein said filaments are formed of synthetic resin.
Claim 9
Dependent Claim
14 words
The ski pole shaft of claim 1 wherein said filaments are formed of carbon.
Claim 10
Dependent Claim
22 words
The ski pole shaft of claim 1 wherein said filaments comprise approximately 60% to 70% of the volume of the shaft wall.
Claim 11
Dependent Claim
15 words
The ski pole shaft of claim 1 wherein said resin comprises a polyester resin material.
Claim 12
Dependent Claim
21 words
The ski pole shaft of claim 1 wherein the outer surface portion of the tubular element comprises synthetic resin matrix material.
Claim 13
Dependent Claim
21 words
The ski pole shaft of claim 1 wherein said filaments are stressed to at least approximately 5% of their breaking stress.
Claim 14
Dependent Claim
127 words
A thin wall ski pole shaft comprising: a tubular element formed of a plurality of continuous high tensile strength filaments extending end to end of the element and spaced in an annular array about the axis of the element, said plurality of filaments including first filaments formed of a first material and second filaments formed of a second material; and a matrix of set synthetic resin embedding said filaments, said filaments being maintained in a longitudinally stressed condition by said set resin matrix to define a longitudinally prestressed thin wall tubular shaft wall having a thickness in the range of approximately 0.05" to 0.10" and an outer diameter of approximately 10 times the thickness of the wall, said filaments comprising a major portion of the shaft wall.
Claim 15
Dependent Claim
127 words
A thin wall ski pole shaft comprising: a tubular element formed of a plurality of continuous high tensile strength filaments extending end to end of the element and spaced in an annular array about the axis of the element, said plurality of filaments including first filaments formed of a first material and second filaments formed of a second material; and a matrix of set synthetic resin embedding said filaments, said filaments being maintained in a longitudinally stressed condition by said set resin matrix to define a longitudinally prestressed thin wall tubular shaft wall having a thickness in the range of approximately 0.05" to 0.10" and an outer diameter of approximately 10 times the thickness of the wall, said filaments comprising a major portion of the shaft wall.
Claim 16
Dependent Claim
20 words
The ski pole shaft of claim 13 wherein said first and second filaments are uniformly distributed in said annular array.
Claim 17
Dependent Claim
31 words
The ski pole shaft of claim 13 wherein said first filaments are distributed in a radially outer annular array and said second filaments are distributed in a radially inner annular array.
Claim 18
Dependent Claim
33 words
The ski pole shaft of claim 13 wherein said first filaments comprise glass filaments distributed in a radially outer annular array and said second filaments are distributed in a radially inner annular array.
Claim 19
Dependent Claim
34 words
The ski pole shaft of claim 13 wherein said first filaments comprise synthetic resin filaments distributed in a radially outer annular array and said second filaments are distributed in a radially inner annular array.
Claim 20
Dependent Claim
19 words
The ski pole shaft of claim 13 wherein said filaments are arranged in spaced tows in said tubular element.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |