Operator controlled vehicle stabilizer

Details Operator controlled vehicle stabilizer Operator controlled vehicle stabilizer

1993-09-21

1995-02-14

Johnson, Brian L.

Land vehicles

Wheeled

Running gear

280714, 280754, 280755, 212189, B60G 17005, B60G 2500

Patent

active

053888570

ABSTRACT:
An apparatus for stabilizing a material handling vehicle which enables or disables a vehicle's suspension system. Pilot-to-open check valves are mounted on hydraulic cylinders secured between the axle and frame of the vehicle. In a first embodiment, a pneumatically actuated check valve is opened or closed to permit or prevent fluid communication between the hydraulic cylinders. The absence of pneumatic pressure in the pneumatic circuit causes the check valves to close, thereby locking the axle to the frame for stability. The presence of pneumatic pressure in the circuit opens the check valves to permit fluid communication between the cylinders. In an alternative embodiment, a second electro-hydraulic circuit is provided in place of the pneumatic circuit for opening and closing pilot-to-close check valves mounted on the hydraulic cylinders.

REFERENCES:
patent: 3958813 (1976-05-01), Carey
patent: 4145073 (1979-03-01), McLuckie
patent: 4152004 (1979-05-01), Schroder
patent: 4174854 (1979-11-01), Spicka et al.
patent: 4264014 (1981-04-01), Hogg et al.
patent: 4382604 (1983-05-01), Nakagawa
patent: 4705295 (1987-11-01), Fought
patent: 4951767 (1990-08-01), Keagbine

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