US Patent Issued to NTN on Nov. 3 for "Ball bearing" (Japanese Inventors)

ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,781,792, issued on Nov. 3, was assigned to NTN Corp. (Osaka, Japan).

"Ball bearing" was invented by Katsuaki Sasaki (Shizuoka, Japan) and Susumu Miyairi (Shizuoka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A ball bearing includes a cage circular annular portion and a seal member. The cage circular annular portion has a cage-side sliding contact surface axially opposed to the seal member and configured to come into sliding contact with the seal member. The seal member has a seal-side sliding contact surface configured to come into sliding contact with the cage-side sliding contact surface. A plurality of axial protrusions each having an axially...