Patent US3877523A successfully refreshed from Google Patents.
US3877523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elongated composite tension members
Assignee: Transmission Developments Ltd
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Filing: 1973-06-27
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Granted: 1975-04-15
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Expires: 1993-06-27
Abstract
Abstract A central tensile core for a composite tension member is formed from a plurality of main reinforcing laminations including bonded fibres. The end of the core provides an anchorage portion having a serrated surface which can mate with an anchorage to hold the anchorage portion within an end fitting. The core has cross reinforcing laminations lying in a plane parallel with the plane of the main laminations to provide shear strength in a plane parallel with the length of the core and with the serrated surface.
Inventors
- 👤 Richard Anthony Ely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:39
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; H; H01; H01B; H01B17/00; H01B17/38; H01B17/40; B32B3/00; B32B3/26; B32B3/30; B32B2305/00; B32B2305/08; Y; Y10; Y10T; Y10T403/00; Y10T403/40; Y10T403/70; Y10T403/7047; Y10T403/7051; Y10T403/7052; Y10T403/7062; Y10T403/7075; Y10T403/7077; Y10T403/7079; Y10T403/7081; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24074; Y10T428/24479; Y10T428/2457; Y10T428/24587
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
175 words
An elongated composite tension member comprising a plurality of reinforcing laminations including continuous reinforcing fibres, selected from the class consisting of glass, carbon and metal wire, extending parallel with the length of the member, combined with a synthetic hardenable resinous material, the member having an anchorage portion where mutually opposed external surfaces of the member are formed to define transverse depressions, capable of providing a mechanical force transmitting surface, and at least one cross-reinforcing lamination of continuous reinforcing fibres all lying in a plane parallel with the planes of the first mentioned laminations and all extending longitududinally between the surfaces providing said anchorage formations, each of the cross-reinforcing laminations having substantial shear strength to resist shear in a plane parallel with the length of the member and Parallel with the surfaces of the member in which the said anchorage formations are provided, and having substantial tensile strength in directions transverse to the length of the member, and transverse to the plane of the surfaces of the member in which the said anchorage formations are provided.
Claim 2
Dependent Claim
175 words
An elongated composite tension member comprising a plurality of reinforcing laminations including continuous reinforcing fibres, selected from the class consisting of glass, carbon and metal wire, extending parallel with the length of the member, combined with a synthetic hardenable resinous material, the member having an anchorage portion where mutually opposed external surfaces of the member are formed to define transverse depressions, capable of providing a mechanical force transmitting surface, and at least one cross-reinforcing lamination of continuous reinforcing fibres all lying in a plane parallel with the planes of the first mentioned laminations and all extending longitududinally between the surfaces providing said anchorage formations, each of the cross-reinforcing laminations having substantial shear strength to resist shear in a plane parallel with the length of the member and Parallel with the surfaces of the member in which the said anchorage formations are provided, and having substantial tensile strength in directions transverse to the length of the member, and transverse to the plane of the surfaces of the member in which the said anchorage formations are provided.
Claim 3
Dependent Claim
42 words
A tension member according to claim 1 wherein the transverse dimensions along the length of the member, in the planes of the cross-reinforcing lamination, are substantially uniform, but are increased in transverse planes perpendicular thereto in the region of the anchorage portion.
Claim 4
Dependent Claim
25 words
A tension member according to claim 1 wherein each cross-reinforcing lamination extends lengthwise of the member a limited distance only adjacent the anchorage portion thereof.
Claim 5
Dependent Claim
27 words
A tension member according to claim 1 wherein the anchorage formations comprise a plurality of longitudinally spaced parallel grooves extending transverse to the length of the member.
Claim 6
Dependent Claim
29 words
A tension member according to claim 1 in combination with an anchorage formed with corresponding formations to engage in and mechanically key with the anchorage formations on the member.
Claim 7
Dependent Claim
22 words
A combination according to claim 5 wherein the anchorage includes at least one metal part shaped to cooperate with the anchorage formations.
Claim 8
Dependent Claim
33 words
A combination according to claim 6 in which the metal part defines at least one passageway and an anchorage pin is received therein to locate the plate or part within an end fitting.
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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |