Semiclosed loop automatic leveling system
Abstract
Abstract IN PREFERRED FORM, A VEHICLE LEVELING SYSTEM COMPRESSOR OPERATED PROPORTIONAL TO VEHICLE ENGING SPEED TO DIRECT COMPRESSED AIR INTO A PRESSURIZABLE AIR CONTROL CHAMBER OF A LEVELER UNIT. AN EXHAUST OPENING FROM THE LEVELER UNIT IS CONTROLLED BY AN UNDAMPED ON-OFF EXHAUST VALVE CONTINUALLY OPERATED IN RESPONSE TO NORMAL VEHICLE ROAD MOVEMENTS AND CHANGES IN LOADING TO EFFECT AN ON-OFF RATIO FOR EXHAUST FLOW FROM THE CONTROL CHAMBER INTO AN AIR COLLECTOR TANK. THE AIR COLLECTOR TANK SERVES TO COLLECT EXCESS AIR DUMPED FROM THE LEVELER UNIT TO PREVENT EXHAUST TO ATMOSPHERE DURING DYNAMIC OPERATION. AN INTAKE VALVE AND A RELIEF VALVE ON THE TANK AND A DESICCANT CARTRIDGE IN THE TANK COOPERATE TO ELIMINATE WATER IN THE SYSTEM DURING ITS OPERATION.
Inventors
- 👤 James E Whelan
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |