Patents by Inventor Seigo Akabe

Seigo Akabe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Bearing grease composition for ABS pump
    Patent number: 5846916
    Abstract: A bearing grease composition for ABS pumps comprises:a silicone oils having a viscosity of 100 to 1,000 cSt (at 25 degree-C.), the silicone oil serving as essential components of a base oil portion, anda diurea compound, as a thickening agent, at the compounding ratio of 2 to 30%-wt, the diurea compound having a general formula of:R.sub.1 --NHCONH--R.sub.2 --NHCONH--R.sub.3wherein R.sub.2 indicates an aromatic bivalent hydroxyl group having the number of carbon atoms of 8 to 16, and R.sub.1 and R.sub.3 respectively indicate a saturated straight chain alkyl group having the number of carbon atoms of 6 to 18, and a cyclohexyl group, and wherein the ratio of the saturated straight chain alkyl group to the cyclohexyl group is within a range of 5 to 95%-mol to 95 to 5%-mol.
    Type: Grant
    Filed: January 22, 1998
    Date of Patent: December 8, 1998
    Assignee: NTN Corporation
    Inventors: Seigo Akabe, Kazuhiro Matsumoto, Yosiki Yamaguchi