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:
Apr. 29, 2003
Filed:
Nov. 07, 2000
Akira Tanaka, Saitama Pref., JP;
Nippon Leakless Industry Co., Ltd., Tokyo, JP;
Abstract
A metal gasket assembly which can enhance the sealing function for combustion pressure in a cylinder bore and maintain the sealing function for a long time, comprises a metal base plate, and a metal reinforcement plate having a thickness smaller than that of the base plate and lapped with the base plate, the base plate having cylinder openings formed at positions corresponding to cylinder bores in a cylinder block of an internal combustion engine, annular beads formed respectively around the cylinder openings and having a V-shaped cross section, a plurality of coolant holes formed in the peripheral parts of the annular beads, and an outer peripheral bead entirely surrounding the annular beads and the plurality of coolant holes and having a cross-sectional shape of slope, and the reinforcement plate having fold-over parts which are folded onto the projection side of the annular bead at the peripheral edge parts of the cylinder openings in the base plate, and extend into the inside of the annular beads so as to form grommets embracing the peripheral edge parts, lapped parts which extend from the peripheral edge parts of the cylinder openings to positions in the vicinity of and outside of the annular beads, on the depression side of the annular beads, and reinforcement beads formed in the lapped parts and projected in the same direction as the direction of the projection of the annular beads so as to be made into close contact with the annular beads.