US Patent Issued to NTN on March 18 for "Grease-sealed bearing" (Japanese Inventor)

ALEXANDRIA, Va., March 19 -- United States Patent no. 12,253,113, issued on March 18, was assigned to NTN Corp. (Osaka, Japan).

"Grease-sealed bearing" was invented by Kota Watanabe (Mie, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "To provide a grease-sealed bearing that is superior in fretting wear resistance and sealing performance when used under an oscillation condition with acceleration and deceleration such as a condition used in a robot joint. A grease-sealed bearing 1 includes an inner ring 2 and an outer ring 3 that are raceway rings, a plurality of rolling elements 4 interposed between the inner ring 2 and the outer ring 3, and a grease composition 7 sealed around the rolling elements 4. T...