Patents by Inventor Keiji Orihara

Keiji Orihara 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).

  • Trim-tilt device for a marine propulsion unit
    Patent number: 6328616
    Abstract: In a trim-tilt device for a marine propulsion unit 20, a cylinder 41 of a cylinder device 21 is covered with a tank 28 constituting a hydraulic fluid supply/discharge device 22 and a relief valve 131 is opened when hydraulic pressure of the tank 25 becomes higher than a fixed value, so that hydraulic fluid of the tank 25 can be relieved for the second tilt chamber 32B.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: December 11, 2001
    Assignee: Showa Corporation
    Inventors: Tamotsu Nakamura, Omito Toyoshima, Hisao Takayanagi, Keiji Orihara
  • Trim-tilt device for marine propulsion unit
    Patent number: 6213823
    Abstract: In a trim-tilt device for a marine propulsion unit (20), a check valve (121) is provided for allowing a hydraulic fluid to flow from a pump (24) to a first trim chamber (32A) and a first tilt chamber (42A), and a relief valve (122), which is opened if the hydraulic pressure of the first trim chamber (32A) and the hydraulic pressure of the first tilt chamber (42A) become higher than a fixed value, are connect in parallel to a hydraulic fluid low passage (91) connecting a first trim chamber (32A) and a first tilt chamber (42A) to a pump (24).
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: April 10, 2001
    Assignee: Showa Corporation
    Inventors: Tamotsu Nakamura, Omito Toyoshima, Hisao Takayanagi, Keiji Orihara