Patents by Inventor Atsuya Ohshima

Atsuya Ohshima 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).

  • Vehicle drive unit
    Patent number: 8016718
    Abstract: A vehicle drive unit is provided which includes a hydraulic circuit capable of efficiently supplying a hydraulic pressure from an accumulator to a hydraulic servo while minimizing the capacity of the accumulator. In a hydraulic circuit included in a continuously variable transmission, an accumulator is connected through an electromagnetic switch valve to an oil passage connecting a clutch pressure control valve and a manual valve, a one-way valve for allowing oil to flow only in the direction from the clutch pressure control valve toward the accumulator and the forward clutch is provided in the oil passage. The electromagnetic switch valve switches an oil passage to a communicating state when the oil pump is driven and switches the oil passage to a shut-off state when the oil pump is stopped.
    Type: Grant
    Filed: November 18, 2008
    Date of Patent: September 13, 2011
    Assignee: Aisin AW Co., Ltd.
    Inventors: Atsuya Ohshima, Shigeo Tsuzuki, Mitsugi Yamashita, Haruki Shirasaka
  • VEHICLE DRIVE UNIT
    Publication number: 20090143193
    Abstract: A vehicle drive unit is provided which includes a hydraulic circuit capable of efficiently supplying a hydraulic pressure from an accumulator to a hydraulic servo while minimizing the capacity of the accumulator. In a hydraulic circuit included in a continuously variable transmission, an accumulator is connected through an electromagnetic switch valve to an oil passage connecting a clutch pressure control valve and a manual valve, a one-way valve for allowing oil to flow only in the direction from the clutch pressure control valve toward the accumulator and the forward clutch is provided in the oil passage. The electromagnetic switch valve switches an oil passage to a communicating state when the oil pump is driven and switches the oil passage to a shut-off state when the oil pump is stopped.
    Type: Application
    Filed: November 18, 2008
    Publication date: June 4, 2009
    Applicant: AISIN AW CO., LTD.
    Inventors: Atsuya Ohshima, Shigeo Tsuzuki, Mitsugi Yamashita, Haruki Shirasaka