Patents by Inventor Takehide Kitagawa

Takehide Kitagawa 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).

  • Engine with turbocharger and EGR
    Patent number: 8438848
    Abstract: An engine includes a variable geometry turbocharger, an EGR valve device, a hydraulic servo drive device that drives the variable geometry turbocharger, a hydraulic servo drive device that drives the EGR valve device, an electronic proportional control valve (EPC valve) that supplies pilot pressure oil to the hydraulic servo drive device, and an electronic proportional control valve (EPC valve) that supplies pilot pressure oil to the hydraulic servo drive device, the EPC valves being attached to the EGR valve device.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: May 14, 2013
    Assignee: Komatsu Ltd.
    Inventors: Takehide Kitagawa, Yasukuni Kawashima, Shuuji Hori, Daisuke Kozuka
  • Engine
    Publication number: 20120017588
    Abstract: An engine includes a variable geometry turbocharger, an EGR valve device, a hydraulic servo drive device that drives the variable geometry turbocharger, a hydraulic servo drive device that drives the EGR valve device, an electronic proportional control valve (EPC valve) that supplies pilot pressure oil to the hydraulic servo drive device, and an electronic proportional control valve (EPC valve) that supplies pilot pressure oil to the hydraulic servo drive device, the EPC valves being attached to the EGR valve device.
    Type: Application
    Filed: March 23, 2010
    Publication date: January 26, 2012
    Applicant: KOMATSU LTD.
    Inventors: Takehide Kitagawa, Yasukuni Kawashima, Shuuji Hori, Daisuke Kozuka