Patents by Inventor Akimasa Yamamoto

Akimasa Yamamoto 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).

  • Automatic torque calibration device
    Patent number: 8931324
    Abstract: The present invention provides an easy-of-use torque calibration device capable of improving workability and safety and attaining reduction in time of a torque calibration in calibrating a torque of a dynamometer. That is, the present invention includes a connecting shaft coaxially connected to a torque measurement rotor, a calibration arm integrally rotated with the connecting shaft, a plurality of calibration weights for applying loads to both ends of the calibration arm, a moving mechanism to move the connecting shaft between a connection position and a spaced position, and a rotating direction fixing mechanism for fixing the torque measurement rotor and the connecting shaft in the rotating direction at the connection position, and a control unit controlling the moving mechanism.
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: January 13, 2015
    Assignee: Horiba, Ltd.
    Inventors: Akimasa Yamamoto, Katsuhiko Keno
  • AUTOMATIC TORQUE CALIBRATION DEVICE
    Publication number: 20110308295
    Abstract: The present invention provides an easy-of-use torque calibration device capable of improving workability and safety and attaining reduction in time of a torque calibration in calibrating a torque of a dynamometer. That is, the present invention includes a connecting shaft coaxially connected to a torque measurement rotor, a calibration arm integrally rotated with the connecting shaft, a plurality of calibration weights for applying loads to both ends of the calibration arm, a moving mechanism to move the connecting shaft between a connection position and a spaced position, and a rotating direction fixing mechanism for fixing the torque measurement rotor and the connecting shaft in the rotating direction at the connection position, and a control unit controlling the moving mechanism.
    Type: Application
    Filed: June 20, 2011
    Publication date: December 22, 2011
    Applicant: HORIBA, LTD.
    Inventors: Akimasa Yamamoto, Katsuhiko Keno
  • Cooling water passage structure for an engine
    Patent number: 7270091
    Abstract: A pair of exhaust ports (4, 4) have flat portions (9, 9) formed on respective inner peripheral surfaces thereof and facing in directions opposite to each other. An intervening cooling water passage (14) is formed between the flat portions (9, 9) when a cylinder head (1) is cast.
    Type: Grant
    Filed: October 11, 2005
    Date of Patent: September 18, 2007
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Satoshi Matsui, Toshihiko Oka, Koichi Yoshimoto, Yoshinori Sakurai, Akimasa Yamamoto
  • Cylinder head structure of engine
    Patent number: 7086355
    Abstract: Head cooling passages are formed around intake ports and exhaust ports provided in a cylinder head, and a flow control member which controls the volume of cooling medium flowing toward the intake ports to be larger than the volume of cooling medium flowing toward the exhaust ports is provided in the vicinity of a supply port via which cooing medium is supplied.
    Type: Grant
    Filed: July 15, 2004
    Date of Patent: August 8, 2006
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventor: Akimasa Yamamoto
  • Cooling water passage structure for an engine
    Publication number: 20060081201
    Abstract: A pair of exhaust ports (4, 4) have flat portions (9, 9) formed on respective inner peripheral surfaces thereof and facing in directions opposite to each other. An intervening cooling water passage (14) is formed between the flat portions (9, 9) when a cylinder head (1) is cast.
    Type: Application
    Filed: October 11, 2005
    Publication date: April 20, 2006
    Applicants: Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Mitsubishi Jidosha Engineering Kabushiki Kaisha
    Inventors: Satoshi Matsui, Toshikiko Oka, Koichi Yoshimoto, Yoshinori Sakurai, Akimasa Yamamoto
  • Cylinder head structure of engine
    Publication number: 20050039706
    Abstract: Head cooling passages are formed around intake ports and exhaust ports provided in a cylinder head, and a flow control member which controls the volume of cooling medium flowing toward the intake ports to be larger than the volume of cooling medium flowing toward the exhaust ports is provided in the vicinity of a supply port via which cooing medium is supplied.
    Type: Application
    Filed: July 15, 2004
    Publication date: February 24, 2005
    Inventor: Akimasa Yamamoto