Patent ID: 6494124
Filing Date: 2002-12-17
Classification: B66C,F15B

Abstract:
A self-contained hydraulic system, comprising:A) a lifting assembly including a pivotally mounted arm; B) a hydraulic reservoir for a pressurized gas and a liquid, said reservoir further including a first outlet; C) hydraulic control means for controlling the flow of liquid through said first outlet and further including a first inlet and a second outlet said first inlet connected to said first outlet; and D) a hydraulic cylinder having a front and rear portions and a second inlet at said front portion connected to said second outlet and a piston assembly movable between two extreme positions, said piston assembly including a piston head and a shaft with a distal end pivotally mounted to said arm so that when said valve means is opened said pressurized liquid forces said piston head and shaft to one of said extreme positions in full distension thereof, and upon the application of force in opposite direction, the pressurized liquid is forced back inside said hydraulic reservoir.