ALEXANDRIA, Va., June 9 -- United States Patent no. 12,287,008, issued on April 29, was assigned to NSK LTD. (Tokyo).
"Grease composition and rolling device" was invented by Azuma Ito (Fujisawa, Japan), Tomoaki Matsumoto (Fujisawa, Japan) and Haruhisa Ashida (Fukuroi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are a grease composition and a rolling device which can prevent a decrease in seal performance even when a low-viscosity base oil having, for example, a kinematic viscosity of 5 to 40 mm2/s is used, and can achieve both seal performance and low torque. A seal member (12a) has a plurality of seal lips (114), (115), and (116) made of an elastic material, and a grease composition is sea...