Railway car plug door structure
Abstract
Abstract A RAILWAY HOUSE CAR HAVING A PLUG-TYPE DOOR MOUNTED ON UPRIGHT SHAFTS INCLUDING LATERALLY SWINGING CRANKS WITH THEIR SWINGING ENDS JOURNALED ON WHEELED CARRIAGES TRAVELING ON A TRACK RUNNING LENGTHWISE ON THE CAR BODY. MECHANISM TO ROTATE THE SHAFTS AND MOVE THE DOOR IN AND OUT OF THE OPENING IN THE CAR WALL INCLUDES A MANUALLY OPERABLE TIMING PLATE PARALLELING THE DOOR AND JOURNALED THEREON AND HAVING A PLURALITY OF ARCUATE CAMS WITH FOLLOWERS OPERATIVELY CONNECTED TO RESPECTIVE CRANKSHAFTS. OTHER CAMS AND FOLLOWERS ACTUATE LOCKING BARS SLIDBLE ON THE DOOR TO ENGAGE AND DISENGAGE KEEPERS ON THE CAR WALL TO HOLD THE DOOR TIGHTLY CLOSED. THE CAMS AND THEIR CONNECTIONS TO THE SHAFTS HOLD THE DOOR AGAINST MOVEMENT BY PRESSURE FROM CAR LADING OR BY IMPACTS DUE TO CAR SHIFTING. ALL THE ABOVE-MENTIONED OPERATIONS ARE ATTAINED WITHOUT USE OF LEVERS EXTENDING LATERALLY FROM THE DOOR. THE MECHANISM MAY BE SECURED AGAINST OPERATION BY THE USUAL RAILWAY CAR SEAL BUT ONLY WHEN THE DOOR IS COMPLETELY CLOSED AND LOCKED.
Inventors
- 👤 Norbert S Wolak
- 👤 Thomas J Wolak
- 👤 Alfons W Ceyer
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |