Patent ID: 6295917
Filing Date: 2001-10-02
Classification: F16F

Abstract:
A lost motion cylinder having a hydraulic circuit with a single fluid inlet and a single fluid outlet, and a cylinder therein containing a reciprocating mechanically driven piston, and a one-way fluid valve permitting only inlet fluid to flow through the circuit, and a one-way valve between the inlet and outlet to permit fluid to flow only in one direction from the inlet to the outlet, the invention comprising:an adjustable flow control element whereby the flow of oil from the cylinder to a reservoir can be selectively adjusted wherein trapped oil upstream of the adjustable flow control element will cushion the cylinder during stroke of the piston in one direction and whereby trapped oil will cushion the cylinder during the stroke of the piston in a second opposite direction;whereupon the fluid in the circuit serves only to cushion the piston in the cylinder and does not apply independent hydraulic power to move and control the reciprocating speed of the piston.