Patents by Inventor Akira Ejiri

Akira Ejiri 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).

  • Power steering apparatus
    Patent number: 8538633
    Abstract: The power steering apparatus according to the invention is a power steering apparatus with a power steering function to drive an oil pump by a motor to generate hydraulic pressure, and to assist in driver's steering through the hydraulic pressure. The power steering apparatus includes a power source voltage detecting unit which detects the voltage of a power source of the power steering apparatus; a motor rotating speed detecting unit which detects the rotating speed of the motor; and a control stopping unit which stops the power steering function when the voltage of the power source detected by the power source voltage detecting unit exceeds a predetermined power source voltage value, and the rotating speed of the motor detected by the motor rotating speed detecting unit is equal to or less than a predetermined motor rotating speed value.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: September 17, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroshi Nishimura, Motohiro Norikawa, Akira Ejiri
  • POWER STEERING APPARATUS
    Publication number: 20110257843
    Abstract: The power steering apparatus according to the invention is a power steering apparatus with a power steering function to drive an oil pump by a motor to generate hydraulic pressure, and to assist in driver's steering through the hydraulic pressure. The power steering apparatus includes a power source voltage detecting unit which detects the voltage of a power source of the power steering apparatus; a motor rotating speed detecting unit which detects the rotating speed of the motor; and a control stopping unit which stops the power steering function when the voltage of the power source detected by the power source voltage detecting unit exceeds a predetermined power source voltage value, and the rotating speed of the motor detected by the motor rotating speed detecting unit is equal to or less than a predetermined motor rotating speed value.
    Type: Application
    Filed: November 9, 2010
    Publication date: October 20, 2011
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroshi NISHIMURA, Motohiro NORIKAWA, Akira EJIRI
  • Active matrix display device of the nonlinear two-terminal type
    Patent number: 4945352
    Abstract: A nonlinear, two-terminal type, active matrix display device has a liquid crystal material sandwiched between intersecting row and column electrodes to define a matrix of picture elements. To avoid crosstalk, a non-selecting signal applied to a row electrode picture element is made equal in phase and amplitude to a signal fed to the opposed column electrode in order to reduce the effective voltage applied to the picture element during each non-selecting period to near zero.
    Type: Grant
    Filed: February 16, 1988
    Date of Patent: July 31, 1990
    Assignee: Seiko Instruments Inc.
    Inventor: Akira Ejiri