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:
Feb. 15, 2022
Filed:
Jul. 31, 2019
Applicant:
Rolls-royce Plc, London, GB;
Inventor:
Giles E Harvey, Derby, GB;
Assignee:
ROLLS-ROYCE plc, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B64D 27/24 (2006.01); F02K 5/00 (2006.01); F02K 3/072 (2006.01); B64C 11/48 (2006.01); B64C 11/00 (2006.01); F02K 3/06 (2006.01); F02C 7/36 (2006.01); F02C 6/00 (2006.01); B64D 35/06 (2006.01); F02K 3/077 (2006.01); F04D 19/00 (2006.01); F04D 25/06 (2006.01); B64D 27/02 (2006.01);
U.S. Cl.
CPC ...
B64D 27/24 (2013.01); B64C 11/001 (2013.01); B64C 11/48 (2013.01); B64D 35/06 (2013.01); F02C 6/00 (2013.01); F02C 7/36 (2013.01); F02K 3/06 (2013.01); F02K 3/072 (2013.01); F02K 3/077 (2013.01); F02K 5/00 (2013.01); B64D 2027/026 (2013.01); F04D 19/002 (2013.01); F04D 25/06 (2013.01); F05D 2220/76 (2013.01);
Abstract
An axial flow turbomachine () for producing thrust to propel an aircraft is shown. The turbomachine has an inner duct () and an outer duct (), both of which are annular and concentric with one another. An inner fan () is located in the inner duct, and is configured to produce a primary pressurised flow (P). An outer fan () is located in an outer duct, and is configured to produce a secondary pressurised flow (S). The outer fan has a hollow hub () through which the inner duct passes. A hub-tip ratio of the outer fan is from 1.6 to 2.2 times a hub-tip ratio of the inner fan.