US Patent Issued to MINEBEA MITSUMI on Jan. 27 for "Rolling bearing, pivot assembly bearing, and disk drive apparatus" (Japanese Inventors)

ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,534,681, issued on Jan. 27, was assigned to MINEBEA MITSUMI Inc. (Nagano, Japan).

"Rolling bearing, pivot assembly bearing, and disk drive apparatus" was invented by Motojiro Tsuna (Nagano, Japan) and Takanori Shingai (Nagano, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The application provides a rolling bearing including a grease composition, the grease composition containing a base oil and a thickener, the base oil containing an aromatic ester-based base oil, and the thickener containing a urea-based thickener, where the grease composition has a storage elastic modulus at 25deg C. of from 1200 to 3000 Pa as measured under conditions of a film...