ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,385,507, issued on Aug. 12, was assigned to Parker-Hannifin Corp. (Cleveland).
"Dual-system hydraulic actuator" was invented by James E. Leigh (Ladera Ranch, Calif.), Gabriel T. Huynh III (Garden Grove, Calif.) and Kong Tran (Lake Forest, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An actuator includes a primary piston and a secondary piston axially movable together in a cylinder assembly; a plurality of chambers comprising: a first chamber, a second chamber, a third chamber, and a fourth chamber, wherein when fluid flows into the first chamber the primary piston extends and when fluid flows into the second chamber the primary piston retracts,...