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:
Mar. 14, 2017
Filed:
Apr. 13, 2012
Applicants:
Clement Marcel Maurice Dejeu, Fontenailles, FR;
Sebastien Pascal, Epouville, FR;
Jerome Talbotec, Combs la Ville, FR;
Michael Leborgne, Baudour, BE;
Ingrid Irene Catherine Lepot, Tinlot, BE;
Inventors:
Clement Marcel Maurice Dejeu, Fontenailles, FR;
Sebastien Pascal, Epouville, FR;
Jerome Talbotec, Combs la Ville, FR;
Michael Leborgne, Baudour, BE;
Ingrid Irene Catherine Lepot, Tinlot, BE;
Primary Examiner:
Int. Cl.
CPC ...
B64C 11/18 (2006.01); F01D 5/14 (2006.01); B64C 11/48 (2006.01); F02C 3/067 (2006.01); F02C 3/10 (2006.01); B64D 27/00 (2006.01);
U.S. Cl.
CPC ...
F01D 5/14 (2013.01); B64C 11/18 (2013.01); B64C 11/48 (2013.01); F02C 3/067 (2013.01); F02C 3/10 (2013.01); B64D 2027/005 (2013.01); F05D 2220/324 (2013.01); F05D 2220/325 (2013.01); F05D 2250/38 (2013.01); Y02T 50/66 (2013.01);
Abstract
A propulsion device including an unducted upstream propeller and a counter-rotating and coaxial downstream propeller. At least one blade of the upstream propeller is configured to generate a corotating secondary vortex for acting upstream of the downstream propeller to destabilize a blade tip vortex of the same at least one blade.