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:
Apr. 03, 2001
Filed:
Aug. 16, 1999
Thomas Schoenemann, Buchs, CH;
Lukas Zehnder, Baden-Dättwil, CH;
Asea Brown Boveri AG, Baden, CH;
Abstract
In a power switch, power-switch fingers of a rated-current switching arrangement, as well as contact fingers (,) of a tulip contact and a switching pin (,) of an arcing switch arrangement, or other parts, each comprise a base body (,) which, at sections which are subjected to high thermal loads by the arc formation, bears a protective layer (,) which is resistant to contact erosion and has been applied to the base body (,) by plasma spraying in vacuum. This enables even complex and flexible parts to be made resistant to contact erosion. The protective layer (,) which is preferably used is a mixture of at least 10% (by weight), in particular at least 50% (by weight) of high-melting metal, such as W, Mo, Ir, and lower-melting metal, such as Cu, Ag, Ti, Fe, e.g. 80% (by weight) W and 20% (by weight) Cu, while the base body used is preferably made from Cu, Ag. Fe, steel, Al or a flexible copper alloy, such as CuBe, CuCr or CuCrZr.