Hydraulic lifting mechanism for a large vehicle trailer

A lifting device, comprising:

• a pair of support tires adapted to support a trailer;
• a fixed frame having a vertical member, a horizontal member, and a pair of diagonal members;
• a connection to the trailer adapted to a moving machine to move the trailer in a forward or a reverse direction and is lifted free of the fixed frame when raised, the connection is a fifth wheel connection and a gooseneck connection;
• a plurality of movable elements allowing movement of the fifth wheel connection and the gooseneck connection along an elevational travel path, the movable elements are connected to a post and the vertical member by a plurality of bearing connections;
• a pair of three-point hitch connections and an upper three-point hitch connection adapted to attach an alternate moving machine;
• an axle assembly mechanically communicating with a lower surface of the third cross member to support the pair of support tires, the pair of support tires are connected to the axle assembly and supported by the third cross member;
• a hydraulic cylinder attached to the horizontal member, the hydraulic cylinder serves as an adjustable connection on the post, the hydraulic cylinder allows the post to be raised and lowered along the elevational travel path with respect to the fixed frame that includes the vertical member, the horizontal member, and the pair of diagonal members, the pair of support tires are connected to the axle assembly and supported by the third cross member;
• a pendant control on a pendant cable raising and lowering the post via the hydraulic cylinder;
• a first pair of bearing shafts attached to the main center supports and the side supports via a plurality of multiple bearing connections, the first pair of bearing shafts supporting the post at a distal end of the movable elements;
• a second pair of bearing shafts supporting the post at the movable elements;
• a third bearing shaft disposed between a pair of angle supports, the third bearing shaft provides structural support for the hydraulic cylinder;
• a battery providing electrical power to an electric motor provided as part of a hydraulic pump and valve assembly;
• and
• a pressure relief valve providing over-pressurization protection with a return flow to a hydraulic reservoir;
• wherein the pendant control controlling the pressure relief valve via the pendant cable;
• wherein the electric motor drives the hydraulic pump and valve assembly;
• wherein the hydraulic pump and valve assembly draws from the hydraulic reservoir and flows to a hydraulic control valve;
• wherein the return path from the hydraulic control valve returns to the hydraulic reservoir;
• and
• wherein output from the pressure relief valve flows to the hydraulic cylinder where a piston provides force to move a repositioning travel path in a vertical direction.