Patent ID: 10578182

Abstract:
Housing has first and second parallel tubular chambers. The first chamber contains a gas spring whose output shaft connects to a first piston of area A1. The second chamber contains a second piston of area A2<A1. Piston A2 connects to the device's output shaft. The housing has a valve block with an internal port in fluid communication with the two chambers between the first and second pistons. The valve block contains an incompressible fluid. A poppet valve is in the internal port. The poppet includes a flow restricting bore therethrough. A force on the output shaft causes the fluid to force open the poppet and displace the piston, A1, storing energy in the gas spring. Upon removal of the force on the device's output shaft, the gas spring pushes the fluid to close the poppet. Hence, only a low volume flow through the bore in the poppet is permitted.