US Patent Issued to Parker-Hannifin on Nov. 11 for "Hydraulic gear pump with hydrostatic shaft bearing and isolated case drain and method of operating a hydraulic gear pump" (North Carolina, Ohio Inventors)

ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,467,455, issued on Nov. 11, was assigned to Parker-Hannifin Corp. (Cleveland).

"Hydraulic gear pump with hydrostatic shaft bearing and isolated case drain and method of operating a hydraulic gear pump" was invented by Dale E. Vanderlaan (Charlotte, N.C.), Hao Zhang (Twinsburg, Ohio) and Satish Kumar Raju Kalidindi (Mayfield Heights, Ohio).

According to the abstract* released by the U.S. Patent & Trademark Office: "An example gear pump includes a pump ring gear; a pump shaft; a pump pinion mounted to the pump shaft and disposed within the pump ring gear, such that external teeth of the pump pinion engage with internal teeth of the pump ring gear, wherein the pump shaft is configured t...