Leveler for trailers
Abstract
Abstract A LEVELER FOR TRAILERS WHEREIN FOUR SIMULTANEOUSLY OPERATED PUMPS OF EQUAL CAPACITY SUPPLY HYDRAULIC FLUID TO FOUR HYDRAULIC LEVELING JACKS MOUNTED AT THE CORNERS OF THE TRAILER. HYDRAULIC FLUID IS SUPPLIED TO THE PUMPS FROM A COMMON RESERVOIR THROUGH A LEVEL SENSOR MOUNTED ON THE TRAILER IN SUCH A MANNER THAT WHEN THE SENSOR IS LEVEL, THE TRAILER IS LIKEWISE LEVEL, THE SENSOR HAVING A CENTRAL DOWNWARDLY DIRECTED INLET AND FOUR UPWARDLY OPEN OUTLETS SPACED RADIALLY FROM THE INLET IN CORRESPONDENCE WITH THE JACKS, THE INLET AND THE FOUR OUTLETS DEFINING A COMMON PLANE SO THAT HYDRAULIC FLUID IS SUPPLIED TO THE LOWER INLET OR INLETS AND CORRESPONDING JACKS WHEN THE LEVEL SENSOR IS TILTED, THEREBY CAUSING THE LEVEL SENSOR TO SEEK A LEVEL CONDITION.
Inventors
- 👤 Lawrence I Liston
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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |