Patent ID: 9470285
Filing Date: 2016-10-18
CPC Classification: B64C,F16F,Y10T

Claim Text:
1. An apparatus that comprises: a housing that comprises an elongate shape that comprises a first compartment and a second compartment, each compartment located concentrically about an axis that extends centrally through a length of the housing, such that each compartment abuts an interface that separates the first compartment from the second compartment; a first piston located within the first compartment of the housing, wherein the first piston defines a first chamber and a second chamber of the first compartment as the first piston moves within the housing; a rod fixed to the first piston such that the rod extends centrally through the second chamber and the second compartment; and a second piston coaxial to the first piston and located within the second compartment of the housing, the second piston configured to move along the rod, and thereby change a distance, between the interface and the second piston, that defines a volume for the second compartment, and accommodate a flow of a fluid from the second chamber into the second compartment, the interface being distinct from either piston.