Patent US3179968A successfully refreshed from Google Patents.
US3179968A
Expired / Lapsed
US
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Power-operated loading ramp
Assignee: Symington Wayne Corp
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Filing: 1962-08-20
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Granted: 1965-04-27
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Expires: 1982-08-20
Abstract
No abstract record available.
Inventors
- 👤 Robert D Lambert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:54
CPC Classifications
B; B65; B65G; B65G69/00; B65G69/28; B65G69/2805; B65G69/2811; B65G69/2817; B65G69/2829
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
A POWER-OPERATED RAMP FOR A LOADING DOCK COMPRISING A PLATFORM HAVING A NUMBER OF PARALLEL LONGITUDINAL STRINGERS, SAID STRINGERS BEING SECURED UNDERNEATH A RELATIVELY FLEXIBLE DECK, A PLATFORM SUPPORTING SECTION INCLUDING A CENTRAL LONGITUDINAL BEAM, THE REAR OF SAID PLATFORM BEING CONNECTED TO SAID PLATFROM SUPPORTING SECTION, HINGE MEAND CONNECTING THE REAR OF SAID PLATFORM SUPPORTION SECTION TO THE EDGE OF SAID LOADING DOCK, POWEROPERATED ELEVATING MEANS REACTING BETWEEN SAID LOADING DOCK AND SAID PLATFORM SUPPORTING SECTION FOR RAISING AND LOWERING SAID RAMP, SAID CENTRAL LONGITUDINAL BEAM EXTENDING UNDER SAID PLATFORM SECTION, A ROCKING BEAM ROTATABLY MOUNTED UPON THR FRONT END OF SAID CENTRAL BEAM, THE UPPER PART OF SAID ROCKING BEAM BEING LOOSELY CONNECTED WITH THE LOWER EDGES OF SAID STRINGERS TO GUIDE THEM TO MOVE PROPORTIONALLY UP AND DOWN PARALLEL TO EACH OTHER WHEN THE FRONT END OF SAID PLATFORM IS TILTED FROM SIDE-TO-SIDE WHEREBY SAID FRONT END OF SAID PLATFROM IS MAINTAINED IN CONTACT WITH A SURFACE UPON WHICH IT RESTS WHICH IS ANGULARLY MISALIGNED WITH SAID LOADING DOCK.
Claim 2
Dependent Claim
172 words
A POWER-OPERATED RAMP FOR A LOADING DOCK COMPRISING A PLATFORM HAVING A NUMBER OF PARALLEL LONGITUDINAL STRINGERS, SAID STRINGERS BEING SECURED UNDERNEATH A RELATIVELY FLEXIBLE DECK, A PLATFORM SUPPORTING SECTION INCLUDING A CENTRAL LONGITUDINAL BEAM, THE REAR OF SAID PLATFORM BEING CONNECTED TO SAID PLATFROM SUPPORTING SECTION, HINGE MEAND CONNECTING THE REAR OF SAID PLATFORM SUPPORTION SECTION TO THE EDGE OF SAID LOADING DOCK, POWEROPERATED ELEVATING MEANS REACTING BETWEEN SAID LOADING DOCK AND SAID PLATFORM SUPPORTING SECTION FOR RAISING AND LOWERING SAID RAMP, SAID CENTRAL LONGITUDINAL BEAM EXTENDING UNDER SAID PLATFORM SECTION, A ROCKING BEAM ROTATABLY MOUNTED UPON THR FRONT END OF SAID CENTRAL BEAM, THE UPPER PART OF SAID ROCKING BEAM BEING LOOSELY CONNECTED WITH THE LOWER EDGES OF SAID STRINGERS TO GUIDE THEM TO MOVE PROPORTIONALLY UP AND DOWN PARALLEL TO EACH OTHER WHEN THE FRONT END OF SAID PLATFORM IS TILTED FROM SIDE-TO-SIDE WHEREBY SAID FRONT END OF SAID PLATFROM IS MAINTAINED IN CONTACT WITH A SURFACE UPON WHICH IT RESTS WHICH IS ANGULARLY MISALIGNED WITH SAID LOADING DOCK.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-26 | 1968-10-26 | 1969-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-26 | 1972-10-26 | 1973-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-26 | 1976-10-26 | 1977-04-27 | $7700.00 | Window Closed / Lapsed |