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:
Feb. 13, 2001
Filed:
Dec. 04, 1998
Applicant:
Inventor:
Tsunekazu Udagawa, Ichikawa, JP;
Assignee:
Ishikawa Gasket Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02F 1/100 ;
U.S. Cl.
CPC ...
F02F 1/100 ;
Abstract
A metal gasket is formed of a metal plate having a hole, an edge portion around the hole, and a base portion extending substantially throughout an entire area of the gasket and located outside the edge portion. At least one annular projection and at least one annular groove are formed on at least one side of the edge portion of the metal plate as one unit. The annular groove is located between the annular projection and the base portion. The base portion of the metal plate has a thickness greater than a thickness at the annular groove and less than a thickness at the annular projection to thereby provide a surface pressure at the at least one annular projection.