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:
Dec. 19, 2000
Filed:
Apr. 27, 1999
Yoshio Miyaoh, Tokyo, JP;
Ishikawa Gasket Co., Ltd., Tokyo, JP;
Abstract
A metal gasket is formed of first, second and third metal plates laminated together. The first metal plate has a first hole, and the second metal plate is situated above the first metal plate and has a second hole. The second hole is greater than the first hole and has a second edge located above the first metal plate. A first bead is formed in at least one of the first and second metal plates to surround the first and second holes. The third metal plate includes a base portion situated above the second metal plate, a curved portion extending from the base portion and situated inside the first and second holes, and a flange extending from the curved portion and situated under the first metal plate. The flange has a third edge located between the first and second edges, so that high surface pressure areas are formed above the flange and the first bead with a low surface pressure area therebetween, by which the gasket can be securely sealed.