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:
Sep. 23, 2008
Filed:
Oct. 28, 2005
Valerio Gerez, Yerres, FR;
Edouard Joseph Jadczak, Le Mee sur Seine, FR;
Florian Poinsot-berthelot, Paris, FR;
Valerio Gerez, Yerres, FR;
Edouard Joseph Jadczak, Le Mee sur Seine, FR;
Florian Poinsot-Berthelot, Paris, FR;
SNECMA, Paris, FR;
Abstract
A shaft mounted to rotate with respect to another fixed or rotary element of a rotary engine to which the shaft is connected by at least one bearing, it being possible for the engine to operate in at least two different operating speeds, the shaft comprising a connection to the bearing that has a state of stiffness that varies with engine operating speed. The connection comprises a squirrel cage comprising at least two points of attachment, one to the bearing and one to the shaft, between which points there extends a flexible portion, the shaft comprises an actuator able to adopt at least two positions for controlling the state of stiffness of the squirrel cage, the actuator comprises a piston designed to be displaced by oil pressure in a chamber formed between the piston and shaft from a rigid state of stiffness position to a soft state of stiffness position.