Patents by Inventor Hirokazau Uehara

Hirokazau Uehara 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).

  • Engine valve assembly for internal combustion engine
    Patent number: 6397806
    Abstract: In an engine valve assembly, a valve lifter comprises a cylindrical main body portion and a head wall portion by which an opening of the cylindrical main body portion is enclosed and with which a cam is brought in contact, a valve stem is contacted on an axial center of the valve lifter and is disposed obliquely with respect to a direction of gravity, an exit of a lubricating oil supply bore is opened to an inner space of the head wall portion and is revolved due to a revolution of the valve lifter caused by a friction developed on the basis of a revolution of the cam, and a spring retainer supports an end of a valve spring, the spring retainer being attached onto the valve stem.
    Type: Grant
    Filed: May 25, 2001
    Date of Patent: June 4, 2002
    Assignee: Unisia Jecs Corporation
    Inventors: Hiroaki Imai, Hirokazau Uehara, Seiji Tsuruta
  • Engine valve assembly for internal combustion engine
    Publication number: 20010047782
    Abstract: In an engine valve assembly, a valve lifter comprises a cylindrical main body portion and a head wall portion by which an opening of the cylindrical main body portion is enclosed and with which a cam is brought in contact, a valve stem is contacted on an axial center of the valve lifter and is disposed obliquely with respect to a direction of gravity, an exit of a lubricating oil supply bore is opened to an inner space of the head wall portion and is revolved due to a revolution of the valve lifter caused by a friction developed on the basis of a revolution of the cam, and a spring retainer supports an end of a valve spring, the spring retainer being attached onto the valve stem.
    Type: Application
    Filed: May 25, 2001
    Publication date: December 6, 2001
    Applicant: UNISIA JECS CORPORATION
    Inventors: Hiroaki Imai, Hirokazau Uehara, Seiji Tsuruta