ALEXANDRIA, Va., June 4 -- United States Patent no. 12,320,412, issued on June 3, was assigned to Regents of the University of Minnesota (Minneapolis).
"Axial piston variable displacement hydraulic devices, such as hydraulic motors, and methods of operating same" was invented by Perry Y. Li (Plymouth, Minn.) and Evan D. Sand (Minneapolis).
According to the abstract* released by the U.S. Patent & Trademark Office: "Devices and methods for improving the efficiency of an axial piston hydraulic motor or other axial piston hydraulic device. In some embodiments, a valve cam, with specified geometry, is assembled to a conventional axial piston hydraulic device (e.g., hydraulic motor, hydraulic pump, hydraulic pump-motor) in a manner permitting s...