Patent ID: 6142439
Filing Date: 2000-11-07
Classification: B66D,F21S,F21V

Abstract:
A lifting apparatus, comprising:a fixed part to be fixed at a height above a surface;a lifting part including:an installation to be installed at the fixed part;a frame;an electric motor on the frame that is rotatable driven in only one direction to move the lifting part upwardly relative to the surface; anda battery on the frame for supplying electric power to the electric motor;wherein the lifting part being suspended from the fixed part by a wire cable to move up and down relative to the surface;a locking device for locking the lifting part to the fixed part;the wire cable being winched by driving the electric motor through a speed reducer on the frame;wherein the lifting part is downwardly movable by the self-weight of the lifting part toward the surface by releasing the locking of the lifting part to the fixed part.