Patents by Inventor Toshihiko Matsushima

Toshihiko Matsushima 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
  • Roller elements for roller bearing
    Patent number: 4893387
    Abstract: A roller element for use in a roller bearing having a surface formed with minute recesses at random so that the ratio RMS(L)/RMS(C) will be not more than 0.8 wherein RMS(L) is the roughness mean square value in the longitudinal direction and RMS(C) is the roughness mean square value in the circumferential direction and so that the SK value is not more than -0.2 in both the longitudinal and circumferential directions.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: January 16, 1990
    Assignee: NTN Toyo Bearing Co., Ltd.
    Inventors: Yoshinobu Akamatsu, Morikatu Kotani, Toshihide Goto, Kenji Hibi, Toshihiko Matsushima