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. 21, 2017
Filed:
Feb. 25, 2013
Pratt & Whitney Canada Corp., Longueuil, CA;
Eugene Gekht, Brossard, CA;
Terrence Lucas, Candiac, CA;
Thomas Francis Haslam-Jones, Brossard, CA;
Danny Mills, Chateauguay, CA;
Guy Bouchard, Mont St. Hilaire, CA;
PRATT & WHITNEY CANADA CORP., Longueuil, Quebec, unknown;
Abstract
A gas turbine engine includes an annular plenum defined with an outer skin and a perforated inner skin for receiving selective air flow to impinge a support case which supports shrouds of the rotor assemblies of the engine therein for active tip clearance control of the rotor assemblies. In one embodiment a bobbin-type transfer tube for supplying cooling air into the plenum, is provided between an outer case of the engine an the plenum such that the thermally induced relative movement of the outer case and the plenum is permitted.