US Patent 7357376 Device for lifting and stabilizing loads

It is described a device for lifting and stabilizing loads, comprising a frame and a height-adjustable crossmember, which is located below said frame, bears the load, and is stabilized by two intersecting telescopic struts that are hinged on the crossmember so that they can pivot, said struts being in turn secured against modifications in length by means of two stays. Each stay, which is deflected by a deflection pulley provided on the frame or crossmember in the vicinity of the hinged ends of the telescopic struts, is guided in a parallel manner to or in an essentially coaxial manner with the pivoting axis of the telescopic strut to an additional (third) deflection pulley and is then conducted to the other respective telescopic strut.