Abstract: A hydraulic jack system for lifting a load is disclosed comprising a hydraulic cylinder having a hydraulic piston for displacing loads and a locking ring for locking the hydraulic cylinder in place when pressure is removed from the hydraulic cylinder. The jack system also has a gear operatively connected to the locking ring for displacement of the locking ring and a top plate connected to the hydraulic piston for receiving the load. A bottom plate connected to the hydraulic cylinder to provide support to the hydraulic cylinder is also disclosed and, securing means for attaching the bottom plate to the hydraulic cylinder wherein the securing means allow for movement of the bottom plate when the hydraulic jack system is lifting a load.

Abstract: An extensible article of furniture suitable for use as a convertible sofa bed or an extensible bed having a pair of substantially identical frame members with end boards and side rails being interlocked with surface slats affixed to the side rails of each frame member and being alternating with one another to form a slat surface of substantial rigidity providing suitable support for sofa and bed applications of the unit. Each of the frame members may provide four-point support from a supporting floor and contains markings for ease of selecting the desired positions of the frame members for use as a sofa or a bed of particular size.