Patents by Inventor Sadatoshi Murakami

Sadatoshi Murakami 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).

  • Rotary roller vane pump made of specific materials
    Patent number: 4362480
    Abstract: A rotary positive displacement pump of the pin roller type comprising a pump housing made of aluminum having a pump chamber with the inner periphery being cylindrical, which is fixed between a pump base and a pump case, a rotor eccentrically located within the pump chamber and driven by a motor, a plurality of rollers made of synthetic resin which is inserted in clearance grooves formed on the outer periphery of the rotor, wherein a centrifugal force generated when the rotor rotates moves the rollers toward the inner wall of the pump housing thereby to form a pump operation space.
    Type: Grant
    Filed: April 1, 1980
    Date of Patent: December 7, 1982
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Ryozo Suzuki, Sadatoshi Murakami, Tatsumi Harada, Hiroyuki Fujiwara, Satoru Yamasaki