Patents by Inventor Nariaki Endo

Nariaki Endo 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: 5005541
    Abstract: A hydraulic valve lifter for use in an internal combustion engine, comprises an inverted cup-like body, an inverted cup-like plunger housed within the body, a high pressure chamber defined between the body and the plunger, and an oil passage through which an oil is fed to the high pressure chamber. At least one oil discharge hole is defined in the plunger and extends from the oil passage to open to a valve stem so as to lubricate between the valve stem and a valve guide.
    Type: Grant
    Filed: July 24, 1990
    Date of Patent: April 9, 1991
    Assignee: Otai Tekko Kabushiki Kaisha and Koyo Seiko Co., Ltd.
    Inventors: Takeomi Yamamoto, Nariaki Endo, Yasushi Kadota, Tadasu Yamakawa