ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,442,398, issued on Oct. 14, was assigned to TONAND INC. (London, Canada).
"Cylinder on demand hydraulic device" was invented by Antonio Cannata (London, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A hydraulic device having: a plurality of main piston-cylinder arrangements, each of the respective pistons having a fixed stroke length and configured for axial reciprocation within their respective cylinder; a plurality of flow control valves for switching between a lockdown state and an unlocked state of one or more of the plurality of main piston cylinder arrangements during operation of the hydraulic device; and one or more control valves for di...