Self stowing vehicle leveling hydraulic jack

In an extendable and retractable motorized hydraulic jack for leveling of a vehicle to which the jack is to be pivotably affixed:

• ram housing means for pivotable attachment to the vehicle to be leveled;
• ram means for telescopic mounting relative to said ram housing means for telescopically axially extending and retracting relative to said ram housing means;
• an electrical motor housed within one of said ram means and said ram housing means;
• a hydraulic pump for being driven by said electrical motor and for containment within one of said ram and ram housing means for pumping hydraulic fluid into a ram extension chamber means formed between said ram housing means and said ram means to cause said ram to move axially of said ram housing means;
• means for pivotably affixing said ram housing means to a vehicle to be leveled;
• self stowing means operatively associated with said ram means and mechanically operatively responsive to telescopic retractive movement of said ram means relative to said ram housing means for pivoting said ram means and said ram housing means, into a stowed position, about the pivoting axis of said pivotable affixing means. said self stowing means including cam means for providing a cam track, cam follower means being arranged for following said cam track, means for producing relative movement of said cam follower means and said cam track, one along the other, with terminal retractive movement of said ram means for causing said ram housing means to be pivoted about said pivotable affixing means into said stowed position;
• retraction chamber means defined by an annular region of space between said ram means and said ram housing means for pressurization with hydraulic fluid for telescopically retracting said ram means relative to said ram housing means, hydraulic conduits interconnecting said hydraulic pump and said ram extension and ram retraction chamber means so that each of said chambers serves as the hydraulic reservoir for the other, and wherein said hydraulic pump means serves to transfer hydraulic fluid between said ram extension chamber means and said ram retraction chamber means via said hydraulic conduits.