ALEXANDRIA, Va., May 26 -- United States Patent no. 12,636,760, issued on May 26, was assigned to HYTORC Division UNEX Corp. (Mahwah, N.J.).
"Apparatus for tightening threaded fasteners" was invented by Eric P. Junkers (Hoboken, N.J.) and Peter Koppenhoefer (East Stroudsburg, Pa.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus for use with a hydraulically driven torque tool for tightening or loosening threaded fasteners including an internal energy storage assembly for automatic piston return is disclosed. In one embodiment, the internal energy storage assembly operates by a pneumatic fluid which compresses during an advance stroke of a piston assembly of the tool and expands during a retract str...