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. 05, 2019
Filed:
Nov. 14, 2014
Corporation DE L'ecole Polytechnique DE Montreal, Montreal, CA;
PRATT & WHITNEY CANADA CORP., Longueuil, QC, CA;
Abstract
A gas turbine engine shroud for surrounding one of a rotor and a stator having a plurality of radially extending airfoils is provided. The shroud includes an annular body defining an axial and a radial direction. The body has a radially inner surface and a plurality of indentations is annularly defined therein. Each of the plurality of indentations has a depth of an order of magnitude of a clearance between the one of the rotor and the stator and the inner surface. The plurality of indentations is defined in a region of the inner face defined axially between projections of leading and trailing edges of the airfoils onto the inner surface of the annular body.