Patents by Inventor Morikatu Kotani

Morikatu Kotani 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 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