Patents by Inventor Toshiharu Katoh

Toshiharu Katoh 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).

  • Resin boot for constant velocity universal joints
    Patent number: 5645286
    Abstract: A bellows portion 3 comprises six ridges 3a (3a1, 3a2, . . . 3a6 as seen from the smaller diameter portion 2), five troughs 3b (3b1, 3b2 . . . 3b5 as seen from the smaller diameter portion 2) and slopes 3c which connect the ridges 3a and troughs 3b. The thickness of each ridge 3a and trough 3b is 0.5-1.45 mm, and the thickness ratio between adjacent and trough 3b (trough/ridge) is (1.0-1.5). The levels of thickness of the ridges 3a and troughs 3b are of the same order when seen in the direction of the axis.
    Type: Grant
    Filed: August 26, 1996
    Date of Patent: July 8, 1997
    Assignee: NTN Corporation
    Inventor: Toshiharu Katoh