Patents by Inventor Shunzoo Tomioka

Shunzoo Tomioka 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).

  • Vertical motor pump
    Patent number: 4545741
    Abstract: A vertical motor pump including an upper bearing and a lower bearing located on the motor side for journaling a rotary shaft for rotation at an upper portion and a lower portion respectively of a rotor, at least one of the upper and lower bearings being constituted by a ball bearing. The vertical motor pump further includes a hydrostatic lubricated bearing system for journaling the rotary shaft besides the ball bearing, for bearing a radial thrust during operation.
    Type: Grant
    Filed: May 9, 1983
    Date of Patent: October 8, 1985
    Assignee: Hitachi, Ltd.
    Inventors: Shunzoo Tomioka, Masaaki Nakano, Kinpei Okano, Kousaku Shimizu, Hiroaki Yoda