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:
Jan. 27, 2015
Filed:
Feb. 21, 2011
Yoshitaka Matsushita, Saitama, JP;
Yuji Takahashi, Saitama, JP;
Yoshimi Arakawa, Saitama, JP;
Nippon Leakless Industry Co., Ltd., Tokyo, JP;
Abstract
Provided is a metal gasket for a cylinder head that is capable of improving engaging force between a substrate and a step adjustment plate. A method for manufacturing the metal gasket for a cylinder head includes the steps of: forming a prepared holein each of a plurality of protruding piecesof the step adjustment plate; forming a tubular portionincluding a plurality of projecting segmentsby inserting a dieincluding a polygonal pyramidal punchinto the prepared holeso as to bend up a peripheral portion around the prepared holewhile cutting the peripheral portion into segments; forming in the substratean fastening holein correspondence with a position of the tubular portionformed in the step adjustment plate; and engaging the protruding piecethrough the substrateby inserting the tubular portionof the step adjustment platethrough the corresponding fastening holeformed in the substrate, and subsequently folding the plurality of projecting segmentsof the tubular portionover to an outside of the substrateand flattening out the projecting segments.