Patents by Inventor Masayuki Washio

Masayuki Washio 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).

  • Intake- and/or exhaust-valve timing control system for internal combustion engines
    Patent number: 4996955
    Abstract: An intake- and/or exhaust-valve timing control system for an internal combustion engine comprises an inner sleeve having an outer toothed portion, firmly connected to a front end of a camshaft, a cam sprocket having an inner toothed portion, connected through a timing chain to an engine crankshaft, and a ring gear mechanism including inner and outer toothed portions respectively meshing with the outer toothed portion of the sleeve and the inner toothed portion of the cam sprocket, for changing the intake and/or exhaust-valve timing of the engine.
    Type: Grant
    Filed: September 29, 1989
    Date of Patent: March 5, 1991
    Assignee: Atsugi Unisia Corporation
    Inventors: Akio Akasaka, Seiji Suga, Kenzi Ohizumi, Akiro Kadowaki, Masayuki Washio
  • Vacuum regulation valve in an exhaust gas recirculation system
    Patent number: 4109624
    Abstract: A vacuum regulation valve operable to regulate the vacuum in the vacuum line of an exhaust gas recirculation system, includes a compact construction and a buffer means which is effective to eliminate the clattering sounds inherent in the conventional vacuum regulation valve.
    Type: Grant
    Filed: December 28, 1976
    Date of Patent: August 29, 1978
    Assignees: Nissan Motor Company, Limited, Atsugi Motor Parts Company, Limited
    Inventors: Masayuki Washio, Tetsuya Harada