Apparatus for manufacturing a pair of present girders
Abstract
Abstract APPARATUS FOR MANUFACTURING A PAIR OF PREBENT GIRDERS BY PREBENDING SIMULTANEOUSLY THE METAL TRUSSES OF SAID GIRDERS IN A VERTICAL PLANE, MAINTAINING THEM IN THE PREBENT POSITION AND EMBEDDING THE TENSION FLANGE OF THE LOWER TRUSS IN A MASS OF CONCRETE AND, THE CONCRETE HAVING SET, PIVOTING THE PAIR OF TRUSSES AROUND ONE OR SEVERAL AXES, WHICH ARE HORIZONTAL AND PARALLEL TO SAID VERTICAL PLANE, UNTIL THEIR RESPECTIVE POSITIONS ARE REVERSED AND THEN EMBEDDING THE TENSION OF THE OTHER TRUSS. A TILTING-DEVICE IS ALSO PROVIDED FOR SUCH A PAIR OF PREBENT TRUSSES, THE LOWER ONE OF WHICH HAVING ITS TENSION FLANGE EMBEDDED IN A MASS OF CONCRETE. THE DEVICE COMPRISES AT LEAST TWO TILTING-MECHANISMS, CONSTITUTED RESPECTIVELY OF TRUSS-SUPPORTS PIVOTING AROUND ONE OF SEVERAL SUCCESSIVE AXES, WHICH ARE HORIZONTAL AND PARALLEL TO SAID VERTICAL PLANE.
Inventors
- 👤 Abraham Lipski
Bibliographic Details
Claims Analysis
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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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |