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. 14, 1990
Filed:
Jun. 23, 1989
Nippon Reinz Co., Ltd., Kanagawa, JP;
Abstract
A metal gasket has an opening for allowing fluid to pass through the gasket, relatively small through-holes for receiving bolts, and a raised portion surrounding the entire circumference of the opening. The raised portion has a double-bead structure including an inner peripheral bead portion formed by an intermediate flat portion and a first frusto-conical portion which connects the intermediate flat portion with an inner peripheral flat portion, and an outer peripheral bead portion formed by the intermediate flat portion and a second frusto-conical portion which connects the intermediate flat portion with an outer peripheral flat portion. The second frusto-conical portion is inclined at an angle which is smaller than that at which the first frusto-conical portion is inclined.