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. 17, 2020
Filed:
Oct. 06, 2017
Pratt & Whitney Canada Corp., Longueuil, CA;
Thomas Veitch, Scarborough, CA;
Farid Abrari, Mississauga, CA;
Ernest Adique, Brampton, CA;
Daniel Fudge, Vaughan, CA;
Kari Heikurinen, Oakville, CA;
Paul Stone, Guelph, CA;
Ignatius Theratil, Mississauga, CA;
Peter Townsend, Longueuil, CA;
Tibor Urac, Mississauga, CA;
PRATT & WHITNEY CANADA CORP., Longueuil, CA;
Abstract
A fan for a gas turbine engine comprises blades distributed around a hub. The blades include first and second blades, having geometric parameters and/or material properties that differ from each other to frequency mistune the fan. The blades are distributed about the hub with at least one second blade between adjacent first blades. The leading edge of the airfoil of the second blades is disposed axially aft of the corresponding leading edge of the first blades in at least a portion of the blade span.