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:
Aug. 05, 2003
Filed:
Sep. 17, 2001
Jean-Pierre Caubet, Dammarie-les-Lys, FR;
Daniel Dao, Savigny-le-Temple, FR;
Antoine Jean, Melun, FR;
Didier Merville, Breuillet, FR;
Snecma Moteurs, Paris, FR;
Abstract
In a turbomachine compressor stator comprising a plurality of variable-pitch vanes ( ), each vane mounted in rotation, about an axis of pivoting ( ), in a wall ( ) forming a surface of revolution about a longitudinal central axis of rotation of the turbomachine ( ), being inclined by a specified angle (&agr;) with respect to a plane perpendicular to this longitudinal central axis, there is provision for this wall to be machined locally opposite an end part of each vane ( ) so as to form a spherical portion or pocket ( ) whose center is positioned on the axis of pivoting and whose radius is determined so as to ensure, over the entire range of operation of the vane, a predetermined minimum clearance between this end part of each vane and the opposite machined spherical pocket while limiting the depth of machining of this pocket.