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. 02, 2016
Filed:
Aug. 03, 2009
Hendrik Marcel Slot, Best, NL;
Sebastiaan Maria Krosse, Belfeld, NL;
Johannes Petruz Zijp, Oisterwijk, NL;
Hendrik Marcel Slot, Best, NL;
Sebastiaan Maria Krosse, Belfeld, NL;
Johannes Petruz Zijp, Oisterwijk, NL;
DAF TRUCKS N.V., Eindhoven, NL;
Abstract
Cylinder head made of cast iron has valve seats provided therein. The valve seats include an annular bore provided in the cast-iron material, a nickel-based intermediate layer which is provided thereon and a contact layer which is provided on said intermediate layer. The contact layer has an air-hardening tool steel, wherein said layers are provided in such a manner that an annularly acting compressive stress is present near the free surface of said contact layer. The invention further includes a method for the production thereof.