Bleistahl Produktions-gmbh & Co. Kg

Christian Blecking

Ekkehard Kohler

Dirk Emde

Ingwar Hunsche

Anna Seyfarth

Robert Hammelmann

Ekkehard KÖHLER

Ingwar HÜNSCHE

The invention relates to a highly heat conductive valve seat ring () comprising a carrier layer () and a functional layer (), wherein the carrier layer () consists of a solidified copper matrix containing 0.10 to 20% w/w of a solidifying component and the functional layer () consists of a solidified copper matrix which further contains, based on the copper matrix, 5 to 35% w/w of one or more hard phases.

Valve seat ring

The invention relates to a valve guide manufactured by a powder-metallurgical process for combustion engines, said guide comprising a central section, a cam-side end piece, and a duct-side end piece, wherein the central section consists of a first material and the duct-side end piece of a second material, with the second material having a hardness in excess of 70 HRB and the first material having a hardness that is by at least 10 HRB lower than that of the second material.

Double/triple-layer valve guide

Growing community of inventors

Schwelm, Germany

Christian Blecking