Patents by Inventor Norio Hanba

Norio Hanba 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).

  • Patent number: 4765634
    Abstract: A metal gasket for a cylinder head of an internal combustion engine comprises at least one narrow portion extending between cylinder bores of the cylinder head to be sealed by the gasket, and beads extending along circumferences of the cylinder bores. The adjacent beads extend in opposite directions with respect to the gasket, thereby enabling the adjacent beads to be smoothly and gently connected. Such smoothly connected beads prevent any cracks or permanent deformations in the proximity of the beads from occuring when the gasket is firmly clamped between the cylinder head and an engine body. Restoring faculty of the gasket is not lost after being clamped therebetween, so that the sealing capacity in the proximities of the beads is remarkably improved in comparison with the prior art.
    Type: Grant
    Filed: October 10, 1986
    Date of Patent: August 23, 1988
    Assignee: Nippon Leakless Industry Co., Ltd.
    Inventors: Masaaki Kobayashi, Norio Hanba, Akira Tanaka, Tsunehiko Abe