| 摘要 |
In a self stowing vehicle leveling hydraulic jack, a cylindrical ram housing is pivotably affixed to the vehicle to be leveled. A cylindrical hydraulically actuated ram is carried within the cylindrical ram housing in a telescoping manner. An electrical motor is contained within the ram. The motor drives a hydraulic pump, also contained in the ram. The output of the pump passes through a control valve for selectively valving the hydraulic fluid between a ram extension chamber and a ram retracting chamber for selectively extending or retracting the telescoping ram. A cam follower, carried from the ram, follows a cam track eccentrically mounted relative to the pivotable axis of the ram housing for pivoting the retracted telescoping jack into a self stowing position. A valve traps the hydraulic fluid in the retracting chamber for holding the retracted jack in the self stowed position.
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