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:
Jun. 28, 2005
Filed:
Sep. 11, 2003
Alain Bassot, Bois-Le Roi, FR;
Jean-claude Bonny, Voisenon, FR;
Philippe Even, Vernon, FR;
Pierre Lamothe, Saint-Paul/Save, FR;
Alain Madec, Chartrettes, FR;
Patrick Reghezza, Vaux le Penil, FR;
Alain Bassot, Bois-Le Roi, FR;
Jean-Claude Bonny, Voisenon, FR;
Philippe Even, Vernon, FR;
Pierre Lamothe, Saint-Paul/Save, FR;
Alain Madec, Chartrettes, FR;
Patrick Reghezza, Vaux le Penil, FR;
Snecma Moteurs, Paris, FR;
Abstract
A fan rotor includes a disk having a rim with a plurality of substantially axial grooves that are spaced apart angularly. Removable blades extend radially outwards from the periphery of the disk. Each blade has a blade root in a respective groove. A downstream flange plate can be secured to the disk with the downstream faces of the blade roots being in abutment against the downstream flange plate. An upstream flange plate is secured to the disk so as to retain the blade roots in the grooves. In the rotor, the upstream flange plate is fitted on its downstream face with a resilient device configured to exert sufficient force on the upstream faces of the blade roots, after assembly, to prevent an axial displacement of the blades during normal operation (apart from exceptional events of the type in which foreign bodies are ingested or blades are lost).