Abstract:
A hydraulic energy absorption device including a cylindrical housing having an interior hollow compartment, the interior hollow compartment having a distal end and a proximal end, a resilient member arranged within the distal end of the cylindrical housing, a piston arranged adjacent to the resilient member within the cylindrical housing, the piston including a piston head and a piston rod extending from the piston head toward the proximal end and a compressible accumulator arranged within the cylindrical housing and connected to the piston. When the piston rod is displaced toward the distal end of the cylindrical housing in operation, the piston head and the compressible accumulator are displaced toward the distal end of the cylindrical housing.
Abstract:
A linear actuator comprising a housing with a proximal end and a distal end, the housing defining a central cavity extending axially through the housing; a piston tube, where a first portion of the piston tube is slidably positioned axially in the housing, and a second portion of the piston tube extends outwardly from the distal end of the housing; an elongated rotatable screw positioned axially within the central cavity of the housing; a nut positioned within the housing and mounted about the screw, the nut configured to move axially within the housing as the screw rotates; and a spring positioned around the screw, the spring positioned within the housing between the nut and the piston tube; wherein the spring is configured to bias the piston tube away from the nut.