Patents by Inventor Yosimi Sugaya

Yosimi Sugaya 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).

  • Valve lifter and method of producing the same
    Patent number: 4829950
    Abstract: A valve lifter has a cylindrical lifter body portion made of an alloy tool steel which body portion extends in the axial direction of the valve lifter, and a head portion made of the alloy tool steel and formed integrally with the body portion which head portion extends at a right angle to the axis. The head portion has an outer surface constituting a cam-contact surface provided with a coating layer, and an inner surface constituting a valve-pressing portion provided with a valve-pressing protrusion. The head portion has a macrostructure of plastic flow oriented in a direction perpendicular to the above-mentioned axis. Disclosed also is a method for producing this valve lifter.
    Type: Grant
    Filed: April 30, 1987
    Date of Patent: May 16, 1989
    Assignees: Hitachi, Ltd., Hitachi Powdered Metals
    Inventors: Hisanobu Kanamaru, Yosimi Sugaya