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. 21, 2017
Filed:
Oct. 08, 2013
Snecma, Paris, FR;
Adrien Fabre, Moissy-Cramayel, FR;
Norbert Lartigue, Moissy-Cramayel, FR;
SNECMA, Paris, FR;
Abstract
The invention concerns a device () for controlling the pitch of the blades of a fan () rotor (), comprising a radial shaft () linked to the blade, a connection rod () of which the axial movement controls the rotation of the radial shaft (), characterized in that it comprises:—a first part () that is mobile in rotation with the rotor () about the axis () of the fan (), and on which one end of each connection rod () is secured,—a second part () linked to the first part (), and—at least three cylinders () capable of moving said second part () in axial translation, and of varying the tilt of said second part, the translation and tilt of the second part () driving a corresponding translation and tilt of the first part (), such that, when the first part () rotates, each connection rod () is subject to axial displacement of which the amplitude is variable and is a function of the tilt of the first part (), making it possible to vary the pitch of the blade during the rotation of same. The invention also concerns a fan, and a method for controlling the pitch of blades.