US Patent Issued to NOK on May 5 for "Sealing ring and sealed structure including same" (Japanese Inventor)

ALEXANDRIA, Va., May 5 -- United States Patent no. 12,618,473, issued on May 5, was assigned to NOK Corp. (Japan).

"Sealing ring and sealed structure including same" was invented by Hideya Watanabe (Kitaibaraki, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A sealed structure includes: a shaft; a member having a hole for the shaft; and a sealing ring sealing a gap between the shaft and the member. The shaft has a circular ring groove centered around the central axis of the shaft. The bottom surface of the groove has a recess. The sealing ring has a protrusion protruding toward the central axis. The protrusion fits into the recess. When the shaft rotates, an end face X of the protrusion and an end face...