Patent ID: 6848693
Filing Date: 2005-02-01
Classification: B60S

Abstract:
1. A leveling system for a vehicle comprising: a plurality of extendible and retractable jacks mounted to a frame of a vehicle for stationarily supporting the vehicle on a ground surface in an extended position of the jacks, the plurality of jacks including first and second jacks located toward a first end of the vehicle and third and fourth jacks located toward an end of the vehicle opposite the first end; a control mechanism; a power system interposed between the control mechanism and the jacks for supplying hydraulic fluid to the jacks to extend and retract the jacks when energized and thereby adjust the attitude of the vehicle relative to level; wherein hydraulic fluid is supplied to the first jack independently from the hydraulic fluid supplied to the other jacks, hydraulic fluid is supplied to the second jack independently from the hydraulic fluid supplied to the other jacks, and hydraulic fluid is supplied in common to the third and fourth jacks independently from the hydraulic fluid supplied to the first and second jacks and wherein each of the first, second, third and fourth jacks are independently hydraulically lockable.