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:
Sep. 03, 2002
Filed:
Aug. 09, 1999
Rainhard Laag, Bopfingen-Kerkingen, DE;
Gunther Schwarz, Tuttlingen, DE;
Manfred Heinritz, Aalen, DE;
Schwabische Huttenwerke GmbH, Aalen, DE;
Abstract
A metallic cast material for friction bodies in acceleration or deceleration devices, particularly in the brake or clutch systems of road or rail vehicles, is produced from the iron/aluminum/carbon tertiary group so that the material is largely in the intermetallic phase having an ordered crystal lattice structure, and free carbon in lamellar, sphoroidal or vermicular form is present therein. The proportion of aluminum in the alloy is between 20 and 28% by weight, preferably 24% by weight. The material may be melted and cast open to the air. Solid or internally ventilated brake discs are mentioned as appropriate friction bodies. The friction bodies are lighter, more resistant to corrosion and wear, have a higher alternate bending fatigue strength and are at least as easily workable as previously known friction bodies made from ferrous materials.