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. 08, 2022
Filed:
May. 02, 2018
Safran Aircraft Engines, Paris, FR;
Kevin Morgane Lemarchand, Moissy-Cramayel, FR;
Gilles Alain Marie Charier, Moissy-Cramayel, FR;
Nathalie Nowakowski, Moissy-Cramayel, FR;
Nicolas Jérôme Jean Tantot, Moissy-Cramayel, FR;
Matthieu Pierre Michel Dubosc, Moissy-Cramayel, FR;
Dominique Gerhardt Mayhew, Moissy-Cramayel, FR;
SAFRAN AIRCRAFT ENGINES, Paris, FR;
Abstract
A turbomachine comprising a ducted fan, a low-pressure turbine shaft and a reduction gearbox housed in a casing between the fan and the low-pressure turbine shaft, the fan rotor supplying airflow to a primary stream and a secondary stream and comprising a hub of diameter D, wherein—the diameter Dof the fan rotor is greater than 82 inches (2.08 metres), —the pressure ratio of the fan is between 1.10 and 1.35, the turbomachine comprises a low-pressure compressor separate from the fan, the reduction gearbox being interposed between the fan rotor and a turbine shaft of the low-pressure compressor, and wherein the reduction gearbox casing has an outside diameter Dgreater than the diameter Dof the hub, the pitch diameter Dof the reduction gearbox ring being between 0.15 and 0.35 times the fan rotor diameter.