Land vehicles – Body elevation or tilt – Establishing riding or trim height
Patent
1981-04-28
1983-06-28
Chambers, A. Michael
Land vehicles
Body elevation or tilt
Establishing riding or trim height
280 6H, 91448, 91530, 13761419, 1376142, 137522, 251141, B62D 3700
Patent
active
043901883
ABSTRACT:
In a high pressure hydraulic system wherein a source supplies pressurized fluid to a slave unit through a control valve operative to maintain the slave unit in a desired condition, leakage from the slave unit past the control valve when the source is inoperative is prevented by a control valve comprising two solenoid-operated valves, oppositely acting and arranged in series between the source and the slave unit, each valve being closed to prevent flow through the valve in a direction towards the other valve and opened to permit flow in both directions, under the control of a solenoid and the pressure differential acting across the valve. A seating portion on the valve located between the other valve and the slave unit is of elastomeric material to provide a leakproof seal when that valve is closed.
In the construction shown the slave unit is an hydraulic suspension strut, and the system is adapted as a vehicular suspension levelling system, with the valves and the source being manipulated as required by an electronic control system.
REFERENCES:
patent: 2294421 (1942-09-01), Ray
patent: 2860850 (1958-11-01), Rhodes et al.
patent: 2882068 (1959-04-01), Faiver
patent: 2891577 (1959-06-01), Stewart, Jr.
patent: 2929640 (1960-03-01), Faiver
patent: 3183932 (1965-05-01), Karpus, Jr.
patent: 3572746 (1971-03-01), Mueller
patent: 3606365 (1971-09-01), Strong
Chambers A. Michael
Lucas Industries Limited
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