| 摘要 |
A leveling jack (10) for a vehicle, such as a recreational vehicle, includes a leveling piston (22) and cylinder (14), a bi-directional, reversible pump (16), and a reservoir (54) within a common sealed housing (12) that does not require exterior fluid connections. The piston (22) is extended from the housing (12) to contact the ground and effect leveling by operating the pump (16) in one direction, and is retracted into the cylinder (14) by operating the pump (16) in the other direction. Accordingly, the leveling jack (10) is a self-contained unit, and does not require a central hydraulic unit and the necessary hoses between the jack and the central hydraulic unit as needed in the prior art. |
