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. 27, 2018
Filed:
May. 21, 2014
Applicant:
Snecma, Paris, FR;
Inventor:
Jonathan Vlastuin, Charenton, FR;
Assignee:
SNECMA, Paris, FR;
Primary Examiner:
Int. Cl.
CPC ...
B64C 11/18 (2006.01); B64D 27/10 (2006.01); F01D 1/26 (2006.01); F01D 5/14 (2006.01); F04D 29/32 (2006.01); B64C 11/48 (2006.01); F02K 3/072 (2006.01); F02C 3/067 (2006.01); B64D 27/00 (2006.01);
U.S. Cl.
CPC ...
B64D 27/10 (2013.01); B64C 11/18 (2013.01); B64C 11/48 (2013.01); F01D 1/26 (2013.01); F01D 5/141 (2013.01); F04D 29/324 (2013.01); B64D 2027/005 (2013.01); F02C 3/067 (2013.01); F02K 3/072 (2013.01); F05D 2220/36 (2013.01); F05D 2240/303 (2013.01); F05D 2240/304 (2013.01); F05D 2240/307 (2013.01); F05D 2260/96 (2013.01); Y02T 50/66 (2013.01); Y02T 50/673 (2013.01);
Abstract
An aircraft turbopropeller includes two coaxial contra-rotating unducted propellers, upstream and downstream respectively, each propeller including an annular row of blades. The blades of the downstream propeller have a reverse sweep in relation to that of the blades of the upstream propeller. The leading edges of the blades of the downstream propeller extend radially outwards from downstream to upstream, at least over a radially outer portion of the blades.