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:
Dec. 02, 2025
Filed:
Apr. 25, 2023
Safran, Paris, FR;
Safran Aircraft Engines, Paris, FR;
Pierre Jean Faivre D′Arcier, Moissy Cramayel, FR;
Clément Pierre Postec, Moissy Cramayel, FR;
Vincent Lionel René Maison, Moissy Cramayel, FR;
Mattéo Minervino, Moissy Cramayel, FR;
SAFRAN, Paris, FR;
SAFRAN SAFRAN AIRCRAFT ENGINES, Paris, FR;
Abstract
A propeller blade or airfoil of a turboprop of composite material includes a fibrous reinforcement densified by a matrix, the propeller blade or airfoil including, in a span direction, a root and an aerodynamic profile. The fibrous reinforcement includes a fibrous preform having a three-dimensional weave with a root preform portion present in the root and an aerodynamic preform portion present in the aerodynamic profile, the root and aerodynamic preform portions being linked to one another by the three-dimensional weave. The root preform portion of the fibrous preform includes an unlinked area delimiting an internal root recess forming a cavity opening at a free end of the root.