Patents by Inventor Tunesaku Itara

Tunesaku Itara 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).

  • Synthetic resin sealing ring assembly with metal film layer
    Patent number: 4747602
    Abstract: A sealing ring assembly comprises a synthetic resin sealing ring body having two opposing stepped cut surface portions including respective planer portions in sliding contact with each other, a synthetic resin gas sealing ring in contact with the inner circumferential surface of the sealing ring body, and a metal ring in contact with the inner circumferential surface of the gas sealing ring. To prevent the stepped cut surface portions from sticking to each other at the planar portions thereof, a metal film layer is provided on a planar portion of one of the stepped cut surface portions.
    Type: Grant
    Filed: June 10, 1987
    Date of Patent: May 31, 1988
    Assignees: Kabushiki Kaisha Riken, Aisin Seiki Kabushiki Kaisha
    Inventors: Daisaku Kobayashi, Tunesaku Itara, Koichiro Kasahara, Yutaka Momose, Tomokimi Mizuno