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. 18, 2006
Filed:
Jun. 30, 2004
Christophe Follonier, Saint Fargeau Ponthierry, FR;
Claude Lejars, Draveil, FR;
Jérôme Mace, Melun, FR;
Bruce Pontoizeau, Paris, FR;
Patrick Reghezza, Vaux le Penil, FR;
Christophe Follonier, Saint Fargeau Ponthierry, FR;
Claude Lejars, Draveil, FR;
Jérôme Mace, Melun, FR;
Bruce Pontoizeau, Paris, FR;
Patrick Reghezza, Vaux le Penil, FR;
Snecma Moteurs, Paris, FR;
Abstract
The invention relates to a method of improving the retention capacity of a blade having an asymmetrical hammerhead connection and extending in a conical stream, with the root of the blade being retained in a peripheral groove in a disk, said groove having an upstream lip and a downstream lip presenting respective bearing surfaces that extend in planes that are asymmetrical relative to planes perpendicular to the axis of rotation of said disk, and against which the surfaces of the upstream and downstream flanks of said root come to bear, the bearing surface of said upstream lip being connected to the bottom wall of said groove via a rounded surface, and the upstream flank presenting, in the vicinity of said rounded surface, a heel situated inside a circle of radius R centered on the axis about which said blade tends to pivot when axial stress is applied thereto, said circle outlining, in the upstream lip, a crescent shape of thickness, wherein: