US3587475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selectively actuated hopper car doors
Assignee: Individual
•
Filing: 1968-12-27
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Granted: 1971-06-28
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Expires: 1988-12-27
Abstract
Abstract A RAILROAD HOPPER CAR OF THE BALLASTING TYPE IN WHICH EACH DISCHARGE CHUTE IS CLOSED BY TWO DOORS WHICH CAN BE OPERATED INDEPENDENTLY OF ONE ANOTHER. THE DOORS OF EACH CHUTE ARE LOCATED ON OPPOSITE SIDES OF ONE OF THE RAILS ON WHICH THE CAR IS RIDING. A SELECTOR MECHANISM IS PROVIDED TO SELECT EITHER ONE, BOTH OR NEITHER OF EACH PAIR OF DOORS FOR OPERATION UPON ROTATION OF A COMMON OPERATING SHAFT. A PAIR OF DOORS AND A SELECTING AND OPERATING MECHANISM FOR A DISCHARGE CHUTE COMES IN A PACKAGE WHICH CAN BE REMOVABLY CONNECTED TO A DISCHARGE CHUTE OF A HOPPER CAR.
Inventors
- 👤 Eduardo M Damy
- 👤 Sergio Rene Damy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:43
CPC Classifications
B; B61; B61D; B61D7/00; B61D7/14; B61D7/16; B61D7/24; B61D7/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |