Patents by Inventor Toshiro Tamada

Toshiro Tamada 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).

  • Positive-displacement fluid motor having self-stopping function, and method and control circuit for stopping the motor
    Patent number: 4785714
    Abstract: A positive-displacement fluid motor wherein a rotating member rotated by pressurized fluid flows to and from fluid chambers can be stopped at a desired one of at least one predetermined angular position by a torque produced by the motor itself. The fluid is supplied into at least one advancing fluid chamber of the fluid chambers which acts to rotate the rotating member in an operating direction of the motor, while causing the fluid to be discharged from at least one reversing fluid chamber of the fluid chambers which acts to rotate the rotating member in a direction opposite to the operating direction, if a motor stop command is generated when the desired angular position is ahead of a current position of the rotating member in the operating direction of the motor.
    Type: Grant
    Filed: July 27, 1987
    Date of Patent: November 22, 1988
    Assignee: Technol Inc.
    Inventors: Toshiro Tamada, Kei Hattori