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:
Mar. 08, 2016
Filed:
Sep. 13, 2012
Eric Durocher, Vercheres, CA;
Pierre-yves Legare, Chambly, CA;
Alessandro Ciampa, Saint-Leonard, CA;
Eric Durocher, Vercheres, CA;
Pierre-Yves Legare, Chambly, CA;
Alessandro Ciampa, Saint-Leonard, CA;
PRATT & WHITNEY CANADA CORP., Longueuil, QC, CA;
Abstract
A mid-turbine frame is disposed between high and low pressure turbine assemblies. A secondary air system is defined in the mid-turbine frame (MTF) to provide cooling to the turbine section of the engine. The secondary air system may be used to cool and pressurize seals to assist with oil retention in bearing cavities. The temperature gain of the secondary air may be reduced by flowing the secondary air through one or more external lines and then generally radially inwardly through air passages defined in the MTF.