Patents by Inventor Katsuyasu Oono

Katsuyasu Oono 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).

  • Hydraulic valve lifter
    Patent number: 4475490
    Abstract: The present invention proposes a hydraulic valve lifter used in an internal combustion engine. The valve lifter has a body consisting of a hollow cylindrical portion accommodating a cylindrical plunger and a lower end portion engaging with a cam controlling the valve motion. The two portions are joined together by welding. The bottom of the plunger is cut out annularly for preventing interference between the plunger and flash, which flash is caused by welding and remains in the inner recess of the lifter body.
    Type: Grant
    Filed: May 28, 1982
    Date of Patent: October 9, 1984
    Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha
    Inventors: Katsuyasu Oono, Gozo Kaji