Abstract: A linear motion power cylinder utilizing a rotor with radially movable impeller vanes rotatably mounted within a cylinder having an eccentric bore, the chamber created between the rotor and cylinder being accessible by two ports, with one port located adjacent to each end of the cylinder. Fluid pressure within the chamber imparts a force on the impeller vanes which in turn drives the rotor. The rotation of the rotor is transferred through a system of planetary gears to a power screw which passes through the center of the rotor. This rotary motion is translated into linear motion by a threaded cylinder rod threadedly engaged with the power screw. The cylinder rod may be moved reciprocally in and out of the linear motion power cylinder increments by reversing the direction of the fluid flow into the cylinder chamber.

Abstract: An improved electrohydraulic jack is disclosed which includes an electromotor for driving a gear pump to transfer an oil supply between a pressure chamber and a supply chamber for elevating a lifting element of the jack.

Abstract: A mechanical locking outrigger hydraulic jack for an outrigger assembly for use with cranes and the like includes vertically disposed cylindrical fixed and movable members, the fixed member being secured to a vertically disposed external sleeve. A variable extension chamber is defined by the interiors of the fixed and movable members. A variable retraction chamber is defined exteriorly of the fixed member and interiorly of the movable member. Valve means permit selective raising and lowering of the movable member. A locking nut threadedly engages the threaded exterior of the movable member and is engagable with an external surface of the locking sleeve to mechanically lock the movable member in an extended, lowered position.

Abstract: A combination of a hydraulic jack with a triangulated steel stand interlocked with a novel, key-secured, ribbed cylinder of high strength light weight alloy, thread-connected to the lifting ram of the jack. Fast finder funnels are enjoined for rapid setting and operating of the combination with a handle having a 90.degree. bend at one extremity and a hinged center engaged by a spring released sleeve restrainer.