Dual assist hydropneumatic jack

摘要

A dual-assist hydropneumatic jack. The dual-assist hydropneumatic jack includes a frame having an upper portion, a lower portion, and a central portion. The central portion defines a chamber therein. A plurality of cylinders are coupled to the frame. A plurality of wheel assemblies are provided coupled to respective ends of the frame, and are adapted to support the jack during loading and unloading. A hydraulic assembly provides hydraulic fluid to and receives hydraulic fluid from the plurality of cylinders. A flow divider is provided between the hydraulic assembly and the plurality of cylinders to divide hydraulic fluid between the respective cylinders. The cylinder includes a means for raising and lowering in response to hydraulic fluid being introduced therein and evacuated therefrom. The cylinder is assisted in lowering by the introduction of air into the cylinder and by the weight of the load.