Abstract: A power source attachment, and a method of manufacture, that runs only off the auxiliary hydraulics of a skid-steer loader or other prime mover. It can run lights and still have extra power to run one or more electrically operated tools on a construction or other jobsite, such as but not limited to welders, jackhammers, air compressors, saws, drills, grinders, and the like. The preferred embodiment comprises a frame, hydraulic hoses, an hydraulic motor, a generator with 110v and 220v plug-ins, and a hydraulic fluid flow control assembly. Optionally, the present invention can be adapted to hydraulically operate devices such as pumps and compressors simultaneously with the electrically powered tools. Since the present invention uses only the hydraulic power and engine horsepower of the prime mover to operate or be moved between locations, it does not require a diesel motor, ignition system, fuel tank, cooling system, or wheels.

Abstract: The present invention relates generally to a hydraulic power unit for supplying hydraulic fluid under pressure to industrial equipment, and more particularly to an auxiliary hydraulic power unit that is adapted to mount to a vehicle and supply auxiliary hydraulic power to auxiliary equipment associated with the vehicle during operation in the field.

Abstract: A hydrostatic drive system for an excavator is provided having a primary energy source on the excavator, at least one pump installed in a housing for supplying several consumers, a connection between each pump and consumer effected through at least one control block and at least one connection from a consumer through a rotary transmission to the pump and wherein at least some of the pumps, distributors, control blocks and rotary transmission are joined into a common block.