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:
Jan. 20, 2009
Filed:
Jul. 23, 2004
Dan Roth-fagaraseanu, Berlin, DE;
Thomas Wunderlich, Rangsdorf, DE;
Dan Roth-Fagaraseanu, Berlin, DE;
Thomas Wunderlich, Rangsdorf, DE;
Rolls-Royce Deutschland Ltd & Co KG, Blankenfelde-Mahlow, DE;
Abstract
On an aircraft engine with a shroudless rotor wheel arranged in a flow duct, the flow duct includes a shroud segment () formed by a ceramic rubbing coating () which, while having good thermal conductivity, is highly-temperature resistant, attaches firmly to the metallic substrate () and is abradable by the tips of the rotor wheel to form a sealing gap as narrow as possible, this rubbing coating, owing to the lack of self-insulation, being coolable from a free side of the metallic substrate and, therefore, permitting for working gas temperatures occurring in high-pressure turbines and coating thicknesses sufficient for abrasion.