Lip latching mechanism for a dockboard
Abstract
Abstract AN IMPROVED LIP LATCHING MECHANISM FOR A DOCKBOARD ADAPTED TO SPAN THE GAP BETWEEN A LOADING DOCK AND THE BED OF A CARRIER. THE DOCKBOARD INCLUDES A RAMP MOUNTED ON THE DOCK AND AN EXTENSION LIP IS HINGED TO THE FORWARD EDGE OF THE RAMP AND IS MOVABLE WITH RESPECT TO THE RAMP FROM A PENDANT POSITION TO AN EXTENDED POSITION. WHEN THE RAMP IS ELEVATED THE LIP IS PIVOTED TO THE EXTENDED POSITION AND SIMULTANEOUSLY A LIP LATCH IS PIVOTED INTO ENGAGEMENT WITH ONE OF A SERIES OF NOTCHES ON A LUG ATTACHED TO THE UNDERSURFACE OF THE LIP TO HOLD THE LIP IN THE EXTENDED POSITION. THE LIP LATCH IS MOVED TO THE OPERATIVE POSITION BY A CONTROL ROD HAVING ONE END CONNECTED TO THE SUPPORTING STRUCTURE AND THE OPPOSITE END ACTS THROUGH A TORSION SPRING AGAINST THE LATCH. AS THE RAMP IS LOWERED, THE SPRING FORCE ON THE LATCH IS WITHDRAWN ENABLING THE LATCH TO PIVOT BY GRAVITY TO ITS INOPERATIVE POSITION.
Inventors
- 👤 Roderick B Potter
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |