Motor vehicles – With leveling device
Patent
1991-10-09
1992-11-03
Rice, Kenneth R.
Motor vehicles
With leveling device
182 2, 182 19, 182 63, 187 9R, 254 9C, 280 61, 280DIG1, B60G 2100
Patent
active
051599899
ABSTRACT:
An automatic leveling system for a four-wheel vehicle system having outrigger assemblies at each of the four corners of the vehicle chassis and in which each outrigger assembly has an outrigger pad and a hydraulic cylinder for moving the pad downwardly and upwardly relative to the ground. The leveling system includes a low-pressure high-flow source of hydraulic fluid which is connected for one-way flow into the head ends of all four of the cylinders to lower all pads to the ground and then maintain them in contact with the ground. A level sensor senses the relative levelness of the right front and left rear corners of the vehicle and high-pressure low-flow hydraulic fluid is connected to the head end of the cylinder at the lower of those two corners to raise that corner of the vehicle relative to the ground. Likewise, another level sensor senses the relative levelness of the left front and right rear vehicle corners and the high-pressure low-flow hydraulic fluid is connected to the head end of the cylinder at the lower of those two corners to raise that corner of the vehicle relative to the ground.
REFERENCES:
patent: 4142710 (1979-03-01), Okunda
patent: 4679489 (1987-07-01), Sasinski et al.
patent: 4746133 (1988-05-01), Manser et al.
Rice Kenneth R.
Up-Right International Manufacturing, Ltd.
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