US4021875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pivotable and extensible tension post for a cable bridge structure
Assignee: United States Department of the Army
•
Filing: 1975-04-10
•
Granted: 1977-05-10
•
Expires: 1995-04-10
Abstract
Abstract This invention relates to bridge sections and is particularly concerned w bridge sections of the type which incorporates tensioned cables to reinforce the structure of the bridge sections. The cables are tensioned to provide a bowstring truss section in the completed bridge.
Inventors
- 👤 William Ray Abell
- 👤 Philip Stanley Bulson
- 👤 Robin Trench Weld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:39
CPC Classifications
E; E01; E01D; E01D15/00; E01D15/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
122 words
A bridge structure having at least one tensioning cable attached thereto at two longitudinally spaced points, at least one post pivoted to said bridge structure at a location between said spaced points, an end of said post spaced from the pivot connection to said bridge structure adapted to engage the cable and movable therealong; means associated with and attached to said bridge structure and said post for rotating said post about the pivot connection to said bridge structure into its operative position, said operative position being substantially perpendicular to the span of said bridge structure; and means associated with and attached to said post for extending the length of said post such that said post places said tensioning cable under tension condition.
Claim 2
Dependent Claim
122 words
A bridge structure having at least one tensioning cable attached thereto at two longitudinally spaced points, at least one post pivoted to said bridge structure at a location between said spaced points, an end of said post spaced from the pivot connection to said bridge structure adapted to engage the cable and movable therealong; means associated with and attached to said bridge structure and said post for rotating said post about the pivot connection to said bridge structure into its operative position, said operative position being substantially perpendicular to the span of said bridge structure; and means associated with and attached to said post for extending the length of said post such that said post places said tensioning cable under tension condition.
Claim 3
Dependent Claim
18 words
A bridge structure as defined in claim 1 wherein said means for extending is a hydraulic extension means.
Claim 4
Dependent Claim
37 words
A bridge structure as defined in claim 1 wherein said means for extending is a telescopic assembly and said end of said post movable on said cable is attached to an extensible section of said telescopic assembly.
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) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |