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:
Nov. 11, 2008
Filed:
May. 17, 2006
Crispin D. Bolgar, Nottingham, GB;
Benjamin A. Leishman, Derby, GB;
Crispin D. Bolgar, Nottingham, GB;
Benjamin A. Leishman, Derby, GB;
Rolls-Royce plc, London, GB;
Abstract
A seal arrangementpresents a barrier in the form of a combined seal and anti-fret lineracross a shroud ring cavityin order to inhibit air leakage in the platform gap between platforms. It will be understood that these gaps are provided for thermal expansion and vibration of vane assemblies but create a leakage path between passageand cavitywhich can increase aerodynamic losses and therefore reduce engine compressor efficiency. By provision of a combined seal and anti-fret linersuch air losses are reduced whilst combining the function of an air leakage seal and an anti-fret liner to prevent abrasive degradation of the mountingsand platform sectionensures that there is a reduced component count as well as cost, weight and assembly time.