Patents by Inventor Kazunori Urakami

Kazunori Urakami 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).

  • Tapered roller bearing
    Patent number: 6086261
    Abstract: The raceway groove width (W) of the inner ring 2 and the length (L) of the tapered roller 3 are finished within predetermined dimensional tolerances. The retaining rib face 2b of the inner ring 2 is machined such that it is a surface parallel to the small end faces 3b of the tapered rollers 3. The clearances .delta. which are defined when the tapered rollers 3 are disposed on the raceway surface 2a of the inner ring 2 and are contacted at the large end faces 3a thereof with the cone back face rib face 2c is secured to be within the dimensional range, .delta..ltoreq.0.4 mm.
    Type: Grant
    Filed: January 11, 1999
    Date of Patent: July 11, 2000
    Assignee: NTN Corporation
    Inventors: Kazufumi Nakagawa, Kazumi Adachi, Kazunori Urakami, Kouji Masuoka, Takashi Tsujimoto