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:
Nov. 25, 2025
Filed:
Sep. 04, 2023
Safran Aircraft Engines, Paris, FR;
Safran, Paris, FR;
Clément Pierre Postec, Moissy-Cramayel, FR;
Vincent Lionel René Maison, Moissy-Cramayel, FR;
Pierre Jean Faivre D'arcier, Moissy-Cramayel, FR;
Mattéo Minervino, Moissy-Cramayel, FR;
François Charleux, Moissy-Cramayel, FR;
SAFRAN AIRCRAFT ENGINES, Paris, FR;
SAFRAN, Paris, FR;
Abstract
A propeller blade or airfoil for a turboprop engine made from composite material including a matrix-densified fibrous reinforcement, the propeller blade or airfoil including, in the direction of its span, a root and an aerodynamic profile. The fibrous reinforcement includes a fibrous preform having three-dimensional weaving with a root preform portion and an aerodynamic profile preform portion. The fibrous preform includes a separation delimiting a recess that forms a cavity extending both into the root and into the aerodynamic profile. A spar is present in the cavity, the spar including an aerodynamic profile shaping portion positioned in a first portion of the cavity and a root shaping portion positioned in a second portion of the cavity. The root has a rotationally symmetric shape.