Patents by Inventor Shouji Ohya

Shouji Ohya 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).

  • Pump including a control valve and sealing member
    Patent number: 5613840
    Abstract: A pump comprising a pump body having a control valve for controlling working fluid flow from the pump body to an actuator through a joint. The joint is connected mechanically to the pump body through a washer made of a material different from that of the pump body. The washer has a side surface held in contact with the pump body at a junction. The pump also includes an annular seal member provided to keep the junction from exposure to the environment. In an embodiment of the invention, the seal member is placed in an annular groove formed in the outer peripheral surface of the pump body. The seal member may have a side surface in fluid-sealing contact with the surface of the washer so as to keep the junction between the pump body and the washer from exposure to the environment.
    Type: Grant
    Filed: April 20, 1995
    Date of Patent: March 25, 1997
    Assignee: Unisia Jecs Corporation
    Inventors: Kazuyoshi Ishizaki, Masateru Yamamuro, Atsushi Ishizuka, Shouji Ohya, Miyoko Hamao
  • Pump and control valve with annular sealing member to prevent corrosion
    Patent number: 5595478
    Abstract: A pump comprising a pump body having a control valve for controlling working fluid flow from the pump body to an actuator through a joint. The joint is connected mechanically to the pump body through a washer made of a material different from that of the pump body. The washer has a side surface held in contact with the pump body at a junction. The pump also includes an annular seal member provided to keep the junction from exposure to the environment. In an embodiment of the present invention (FIG. 7), an annular member is provided between the pump body and the washer, with the annular member being made of an insulating material to prevent electrical conduction between the pump body and the washer.
    Type: Grant
    Filed: April 20, 1995
    Date of Patent: January 21, 1997
    Assignee: Unisia Jecs Corporation
    Inventors: Kazuyoshi Ishizaki, Masateru Yamamuro, Atsushi Ishizuka, Shouji Ohya, Miyoko Hamao
  • Pump including a control valve
    Patent number: 5540566
    Abstract: A pump comprising a pump body having a control valve for controlling working fluid flow from the pump body to an actuator through a joint. The joint is connected mechanically to the pump body through a washer made of a material different from that of the pump body. The washer has a side surface held in contact with the pump body at a galvanic junction. The pump also includes an annular seal member provided to keep the junction from exposure to the environment.
    Type: Grant
    Filed: August 10, 1993
    Date of Patent: July 30, 1996
    Assignee: Unista Jecs Corporation
    Inventors: Kazuyoshi Ishizaki, Masateru Yamamuro, Atsushi Ishizuka, Shouji Ohya, Miyoko Hamao