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. 28, 2023
Filed:
Feb. 07, 2020
Applicant:
Pratt & Whitney Canada Corp., Longueuil, CA;
Inventor:
Sid-Ali Meslioui, Brossard, CA;
Assignee:
PRATT & WHITNEY CANADA CORP., Longueuil, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02C 7/045 (2006.01); F02C 7/24 (2006.01);
U.S. Cl.
CPC ...
F02C 7/045 (2013.01); F02C 7/24 (2013.01); F05D 2220/36 (2013.01); F05D 2240/12 (2013.01); F05D 2240/14 (2013.01); F05D 2250/191 (2013.01); F05D 2260/96 (2013.01); F05D 2270/333 (2013.01);
Abstract
There is provided a turbofan engine having: a fan rotatable about an axis within a case; a first acoustic treatment lining a first portion of the case upstream of the fan; and a second acoustic treatment lining a second portion of the case downstream of the fan, the first acoustic treatment having different noise-attenuating characteristics relative to the second acoustic treatment.