ALEXANDRIA, Va., Aug. 25 -- United States Patent no. 12,716,494, issued on Aug. 25, was assigned to NOK Corp. (Japan).
"Sealing device and back-up ring" was invented by Kakeru Okochi (Kitaibaraki, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A sealing device is configured to seal a clearance between a housing and a shaft of a hydraulic cylinder. The sealing device includes an annular packing that is disposed within the clearance and comprises an elastic material, and a back-up ring that is in contact with the packing. The back-up ring has a contact surface that is in contact with the shaft, and a portion including at least the contact surface of the back-up ring comprises a resin composition that inc...