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:
Aug. 28, 2018
Filed:
Nov. 28, 2016
Applicant:
Pratt & Whitney Canada Corp., Longueuil, CA;
Inventors:
Andrew R. Marshall, Grand Valley, CA;
David Menheere, Norval, CA;
Assignee:
PRATT & WHITNEY CANADA CORP., Longueuil, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04D 29/56 (2006.01); F04D 29/54 (2006.01); F04D 29/16 (2006.01); F01D 17/16 (2006.01); F01D 5/14 (2006.01); B33Y 10/00 (2015.01); F04D 29/02 (2006.01); B33Y 80/00 (2015.01); B22F 3/105 (2006.01); B22F 5/00 (2006.01); B23K 15/00 (2006.01); F01D 11/12 (2006.01); B23K 101/00 (2006.01);
U.S. Cl.
CPC ...
F04D 29/563 (2013.01); B22F 3/1055 (2013.01); B22F 5/009 (2013.01); B23K 15/0086 (2013.01); B33Y 10/00 (2014.12); B33Y 80/00 (2014.12); F01D 5/143 (2013.01); F01D 17/162 (2013.01); F04D 29/023 (2013.01); F04D 29/164 (2013.01); F04D 29/542 (2013.01); B23K 2201/001 (2013.01); F01D 11/12 (2013.01); F05D 2230/31 (2013.01); F05D 2300/514 (2013.01); F05D 2300/603 (2013.01); F05D 2300/608 (2013.01); F05D 2300/613 (2013.01); Y10T 29/49245 (2015.01);
Abstract
A variable vane assembly for a gas turbine engine compressor and method of manufacturing same is described. A plurality of projections on the inner and/or outer shroud protrude into the annular gas path, each projection being at least partially circumferentially disposed between two variable vanes and located adjacent the overhang portion thereof. The projections have an angled planar surface that is substantially parallel to a plane defined by a terminal edge of the overhang portion of the variable vanes when pivoted through a vane pivot arc.