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:
Jul. 22, 2008
Filed:
Jul. 21, 2004
Ernst Esswein, Kleinkarlbach, DE;
Stefan Grau, Blaustein, DE;
Tilmann Haug, Weissenhorn, DE;
Alexander Sagel, Mosbach, DE;
Ernst Esswein, Kleinkarlbach, DE;
Stefan Grau, Blaustein, DE;
Tilmann Haug, Weissenhorn, DE;
Alexander Sagel, Mosbach, DE;
Daimler AG, Stuttgart, DE;
Abstract
A cylinder head for internal combustion engines, comprising a metallic valve seat ring that is formed by a thermally sprayed homogeneous layer made of a basic Co or Co/Mo alloy. The sum of the Co content and Mo content in the alloy exceeds 50 percent by weight while the Fe content lies below 5 percent by weight. Also disclosed is a method for thermally spraying said valve seat ring by means of an arc wire spraying process with the aid of at least two filler wires and/or composite wires, the essential Co portion in the deposited layer being delivered by the jacket of the filler wire and/or the matrix of the composite wire.