Patents by Inventor Fujio Iwashita

Fujio Iwashita 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).

  • Motor
    Patent number: 5811903
    Abstract: A motor comprises a motor rotation shaft, a first thrust bearing which supports one end of the motor rotation shaft and a second thrust bearing which supports the other end of the motor rotation shaft to control positioning in a thrust direction of the motor rotation shaft. The first thrust bearing further comprises a bearing for supporting one end of the motor rotation shaft and is movable in a shaft direction of the motor rotation shaft, a guide member for guiding the movement of the bearing in the shaft direction and a plurality of pre-loaded elements for opposing the force generated by the bearing in the shaft direction. The pre-loaded elements are evenly spaced around the motor shaft.
    Type: Grant
    Filed: September 26, 1996
    Date of Patent: September 22, 1998
    Assignee: Sankyo Seiki Mfg. Co., Ltd.
    Inventors: Toshio Ueno, Fujio Iwashita, Toshio Yamamoto, Shigeru Ozawa