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:
Jan. 04, 2022
Filed:
Dec. 13, 2019
Applicant:
Pratt & Whitney Canada Corp., Longueuil, CA;
Inventor:
Tibor Urac, Mississauga, CA;
Assignee:
PRATT & WHITNEY CANADA CORP., Longueuil, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01D 21/04 (2006.01); F01D 11/12 (2006.01); F01D 25/24 (2006.01); F04D 29/52 (2006.01);
U.S. Cl.
CPC ...
F01D 21/045 (2013.01); F01D 11/122 (2013.01); F01D 25/24 (2013.01); F04D 29/526 (2013.01); F05D 2220/323 (2013.01); F05D 2220/36 (2013.01); F05D 2240/14 (2013.01); F05D 2240/307 (2013.01); F05D 2250/283 (2013.01); F05D 2250/294 (2013.01);
Abstract
An abradable layer for a rotor case of a gas turbine engine has a base of a high density abradable material axially spanning a central portion of the blade tip and having shallow annular pockets of a less durable abradable material of a lower density axially spanning the leading and trailing edges of the blade tip.