Abstract: A compact lifting device whose load arm is fixed to a cover of lid of a processing chamber provides, a tubular pan body with an externally easily adjustable spring counterweight type member passing through the tubular center of the pan body. The spring member is cleverly mounted between an upper and lower portion of the pan body and rotates with the pan body as the lift mechanism swings from side to side. An innovative center core mounting of the spring device allows loads from the lifted weight to be equally distributed on two side of the pan body. The rotation of the pan body is by the use of bearings which are constructed so that a flange of pan body is utilized as two races of a ball bearing further reducing the space need for mounting such a lifting device.