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:
Jul. 13, 2021
Filed:
Oct. 28, 2016
Applicant:
Rolls-royce Corporation, Indianapolis, IN (US);
Inventors:
Bronwyn Power, Indianapolis, IN (US);
Jonathan M. Rivers, Indianapolis, IN (US);
Assignee:
Rolls-Royce Corporation, Indianapolis, IN;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D 29/32 (2006.01); F02K 3/072 (2006.01); F02C 9/58 (2006.01); F01D 5/14 (2006.01); F02K 3/04 (2006.01); F01D 5/22 (2006.01); B64C 11/00 (2006.01); B64C 11/48 (2006.01); F04D 19/00 (2006.01); F04D 29/02 (2006.01); B64D 27/00 (2006.01);
U.S. Cl.
CPC ...
F04D 29/326 (2013.01); B64C 11/001 (2013.01); B64C 11/48 (2013.01); F01D 5/143 (2013.01); F01D 5/225 (2013.01); F02C 9/58 (2013.01); F02K 3/04 (2013.01); F02K 3/072 (2013.01); F04D 19/002 (2013.01); F04D 29/023 (2013.01); B64C 2201/162 (2013.01); B64C 2201/165 (2013.01); B64D 2027/005 (2013.01); F05D 2220/323 (2013.01); F05D 2220/326 (2013.01); F05D 2220/327 (2013.01); F05D 2220/36 (2013.01);
Abstract
A fan system includes a rotor having plurality of blades and a ring airfoil, the plurality of blades being rotatably joined to a hub and the ring airfoil. The fan system may include a second contra-rotationally disposed rotor having a plurality of blades and a ring airfoil. The first and second ring airfoils having a cambered shape and an angle of attack between about −5 degrees and about 45 degrees. Passive leading edge slats are attached to the ring airfoil and are configured to open and close using springs.