Patents by Inventor Wataru Koizumi

Wataru Koizumi 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).

  • Method of diagnosing regeneration failure of exhaust emission control device
    Patent number: 8826730
    Abstract: Provided is a method of diagnosing regeneration failure of an exhaust emission control device including filter regenerating means for forcibly heating a particulate filter 13 so as to burn off captured particulates. An exhaust flow rate to the particulate filter 13 and a differential pressure between entry and exit sides of the particulate filter 13 are obtained to calculate a gradient of change in the differential pressure relative to change in the exhaust flow rate. The calculated gradient is compared with a predetermined reference gradient to diagnose the particulate filter 13 as having regeneration failure when the calculated gradient exceeds the reference gradient.
    Type: Grant
    Filed: December 9, 2009
    Date of Patent: September 9, 2014
    Assignee: Hino Motors, Ltd.
    Inventors: Wataru Koizumi, Hironori Narita, Jinichi Minamikawa
  • METHOD OF DIAGNOSING REGENERATION FAILURE OF EXHAUST EMISSION CONTROL DEVICE
    Publication number: 20110232364
    Abstract: Provided is a method of diagnosing regeneration failure of an exhaust emission control device including filter regenerating means for forcibly heating a particulate filter 13 so as to burn off captured particulates. An exhaust flow rate to the particulate filter 13 and a differential pressure between entry and exit sides of the particulate filter 13 are obtained to calculate a gradient of change in the differential pressure relative to change in the exhaust flow rate. The calculated gradient is compared with a predetermined reference gradient to diagnose the particulate filter 13 as having regeneration failure when the calculated gradient exceeds the reference gradient.
    Type: Application
    Filed: December 9, 2009
    Publication date: September 29, 2011
    Applicant: HINO MOTORS, LTD.
    Inventors: Wataru Koizumi, Hironori Narita, Jinichi Minamikawa
  • Ink cartridge
    Patent number: D1049218
    Type: Grant
    Filed: January 31, 2022
    Date of Patent: October 29, 2024
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Takumi Nagashima, Yoshihiro Koizumi, Shun Oya, Wataru Suzuki