Electric controller for vehicle leveling system
Abstract
Abstract IN PREFERRED FORM, A CONTROLLER FOR A VEHICLE LEVELING SYSTEM THAT HAS AN AUXILIARY LOAD-SUPPORTING AIR SPRING FOR MAINTAINING A VEHICLE HEIGHT. AN ELECTRICAL SWITCH IS MOUNTED ON THE AIR SPRING AND IS RESPONSIVE TO THE HEIGHT OF THE VEHICLE CHASSIS TO SELECTIVELY CONTROL EITHER ENERGIZATION OF AN ELECTRIC MOTOR DRIVEN COMPRESSOR TO EXHAUST OR PUMP-DOWN THE AIR SPRINGS OR ENERGIZATION OF A SOLENOID CONTROLLED VALVE TO COMMUNICATE A STORAGE TAND WITH THE AIR SPRING DURING PUMP-UP OR INFLATION PHASE OF OPERATION. THE SWITCH INCLUDES A PRESSURE SENSING CHAMBER IN COMMUNICATION WITH THE AIR SPRING AND A PRESSURE RESPONSIVE PISTON OPERATED BY PRESSURE IN THE AIR SPRING TO CONDITION THE SWITCH TO SHUT-OFF THE COMPRESSOR.
Inventors
- 👤 George W Jackson
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) | 1974-09-19 | 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 |