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:
Dec. 31, 2002
Filed:
Sep. 29, 2000
Applicant:
Inventors:
Michel Bellerose, Boucherville, CA;
Isabelle Bacon, Longueuil, CA;
Ronald Francis Trumper, St. Bruno, CA;
Assignee:
Pratt & Whitney Canada Corp., Longueuil, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B64C 2/732 ;
U.S. Cl.
CPC ...
B64C 2/732 ;
Abstract
A multi-stage compressor rotor for a gas turbine engine comprises an axial-flow rotor followed by a centrifugal rotor. The axial-flow rotor and the centrifugal rotor are diffusion bonded together to form a unitary dual flow impeller having blades with continues axial-flow and centrifugal stage sections. By eliminating the gap between the axial flow and centrifugal stages, unsynchronized air deflection between the successive arrays of blades is prevented, thereby improving the aerodynamic performance of the compressor rotor.