The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 11, 1998
Filed:
Aug. 19, 1997
Kazukuni Takada, Ibaragi, JP;
Hiroshi Uemura, Higashiosaka, JP;
Masahiko Miura, Osaka-fu, JP;
Kazuya Nakata, Toyota, JP;
Yoshikazu Shinpo, Nisshin, JP;
Nippon Gasket Co., Ltd., Osaka-fu, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Abstract
The present invention comprises a pair of bead plates on which beads are formed, and an intermediate plate on which first and second stepped portions are formed. One of the bead plates is provided with auxiliary beads so as to prevent a full compression of the beads and increase the sealability. This metal gasket comprises first and second bead plates having beads and extending along the circumferences of holes, and an intermediate plate interposed between the bead plates. The intermediate plate is provided in the regions thereof which extend along the circumferences of the holes and on the inner side of the beads with first stepped portions extending toward the first bead plate, and second stepped portions extending toward the second bead plate. The second bead plate is provided with auxiliary beads extending toward the second stepped portions. The auxiliary beads are adapted to engage the intermediate plate to increase the surface pressure and prevent the leakage of a high-temperature gas toward the beads on the first and second bead plates and the permanent set in fatigue of wing parts of the second stepped portions of the intermediate plate.