Jack system for vehicle

Claim 1

In combination, a vehicle and a jack system to selectively raise and lower a selected portion of the vehicle, said vehicle including a power steering pump and said jack system comprising: a first hydraulic jack and a second hydraulic jack, each of said jacks having a vertically oriented longitudinal centerline, and each jack including a fixed cylindrical portion and a movable piston portion, said cylindrical portion including a closed upper end and a closed lower end, said closed lower end having an axial opening and said piston portion including a vertically downwardly extending rod telescopically passing through said opening, and said cylindrical portion including an upper port and a lower port adjacent the closed upper and closed lower ends respectively; means to mount each of said jacks to the vehicle at spaced locations; said rod having an outer terminal end comprising a foot to apply a lifting force to the vehicle when the rod is extended on movement of said piston, wherein said terminal end is pivotally mounted to said rod and spring means are provided to urge said terminal end into a predetermined position and yieldable upon vertically applied forces to rotate about said pivot; and a hydraulic system including a reservoir, said power steering pump and said pump including valve control means, and conduit means connecting the pump to the upper port and lower port of each jack and to the reservoir, said control means being effective to deliver fluid pressure to selectively raise or lower said foot; said outer terminal end comprising a foot including an enlarged portion defining a peripheral skirt and means connecting the enlarged portion to the terminal end of said rod and said means to mount comprising a bracket means about said cylinder.