Patents by Inventor Fumio Oba

Fumio Oba 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).

  • Roller bearing
    Patent number: 5615956
    Abstract: A roller bearing includes an outer ring having a raceway formed on its inner periphery, a plurality of rollers arranged along the raceway at predetermined intervals, and a solid lubricant filling the spaces between the adjacent rollers. The rollers and the solid lubricant form a one-piece body. The problems of large friction between rollers and the skewing of rollers are solved and it is possible to increase the load-bearing capacity of the bearing by using a large number of longer rollers.
    Type: Grant
    Filed: September 13, 1996
    Date of Patent: April 1, 1997
    Assignee: NTN Corporation
    Inventors: Fumio Oba, Toshihiko Matsushima, Hitoshi Murakami, Tomoaki Terada