ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,523,153, issued on Jan. 13.
"Bidirectional rotary hydraulic motor and pump" was invented by Herbert Dym (Poughkeepsie, N.Y.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A hydraulic device comprises a rotary toroidal piston chamber having a rectangular space with a bottom, two sidewalls, and an open top. Four stationary pistons and two retractable gates for each piston are within the toroidal chamber mounted on a chamber wheel fixed to an axle on which it rotates, wherein the pistons and the gates are evenly spaced around the toroidal chamber separating the chamber into four partitions. A piston support for each piston is configured to hold the piston ...