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:
Apr. 16, 2024
Filed:
Feb. 26, 2021
Safran Aircraft Engines, Paris, FR;
Vincent Joudon, Moissy-Cramayel, FR;
Régis Eugène Henri Servant, Moissy-Cramayel, FR;
SAFRAN AIRCRAFT ENGINES, Paris, FR;
Abstract
The present invention relates to a fan rotor with variable pitch blades, comprising a rotor disc, equipped at its periphery with a plurality of rotary fasteners (), each fastener () comprising a cell () for receiving the root () of a blade (). This rotor is characterised in that an elongated wedge () and a prestressing rod () with at least one cam () are also arranged in each cell (), the bottom of the cell () comprising as many retraction cavities () as the rod () comprises cams (), in that the prestressing rod () is interposed between the wedge () and the bottom () of the cell (), so that said cam () is facing a corresponding retraction cavity () and in that the prestressing rod () can rotate about its longitudinal axis (X-X′), between a rest position, in which the cam () is housed in the retraction cavity (), and an armed position, in which the cam () exerts a radial pressure on the central region () of the wedge () so as to move the wedge () towards the blade root ().