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:
Feb. 03, 2015
Filed:
Jan. 24, 2012
Eric Durocher, Vercheres, CA;
John Pietrobon, Outremont, CA;
Zenon Szlanta, Brossard, CA;
Roger Huppe, Chambly, CA;
Eric Durocher, Vercheres, CA;
John Pietrobon, Outremont, CA;
Zenon Szlanta, Brossard, CA;
Roger Huppe, Chambly, CA;
Pratt & Whitney Canada Corp., Longueuil, Quebec, CA;
Abstract
An oil purge system for a mid turbine frame (MTF) of a gas turbine engine has an oil transfer tube surrounded by a heat shield tube. The oil transfer and heat shield tubes extend at their respective inner ends downwardly from an oil port of a bearing housing and terminate at their respective outer ends projecting outwardly from an annular wall of an outer case of the MTF. Oil leaked from the oil port is purged by pressurized air through an annular cavity formed between the oil transfer and heat shield tubes, and is discharged out of the MTF.