Dockboard
Abstract
Abstract IN A DOCKBOARD COMPRISING A MAIN PLATE WITH A LIP PLATE PIVOTALLY MOUNTED ON ITS FRONT EDGE COMBINED LIP ELEVATING MEANS AND LATCHING MEANS TO HOLD THE LIP PLATE IN ITS EXTENDED POSITON COMPRISE AN ARM ON THE LIP PLATE AND A LATCH ARM CONNECTED THERETO IN TOGGLE CONFIGURATION WITH SPRING MEANS URGING THE LINKAGE AWAY FROM ITS NEUTRAL POSITON? THE CO-OPERAGING LATCH MEMBERS ARE ON THE MAIN PLATE AND THE LATCH ARM SO THAT THE LIP ELEVATING SPRING ALSO ENSURES ENGAGEMENT AND DISENGAGEMENT OF THE LATCH? THE REAR END OF THE LATCH ARM MOVES FREELY VERTICALLY, THE SPRING BEING CONNECTED TO GIVE AN ACCELERATED SNAP ACTION THROUGH THE TOGGLE NEUTRAL POSITION? ONE OF THE LATCH MEMBERS IS A CAM AND PERMITS THE LATCH TO RELEASE IF AN EXCESSIVE FORCE IS APPLIED TO THE LIP, FOR EXAMPLE BY A TRANSPORT BACKING INTO THE LIP OR THE DOCKBOARD MOVING DOWNWARDS WITH AN EXCESSIVE FORCE.
Inventors
- 👤 John A Merrick
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |