Patent ID: 7377288
Filing Date: 2008-05-27
Classification: G05D,Y10T

Abstract:
1. A device for balancing the pressures of first and second fluids contained respectively within first and second circuits or receptacles, wherein the device comprises: first and second valves respectively comprising first and second valve bodies respectively defining first and second chambers communicating via first and second admission orifices respectively with the first and second circuits or receptacles respectively containing the first and second fluids, and communicating via respective exhaust orifices with respective exhaust means for the first and second fluids, at least one first valve member and at least one second valve member mounted to move respectively in the first and second chambers along an axial actuation direction between a position for closing and a position for opening the exhaust orifices of the first and second chambers respectively, a first piston and a second piston each constituted by a rigid plate secured respectively to the first or to the second valve member, and a flexible metal wall of a bellows secured in leak tight manner to the rigid plate of the respective piston and to an element of the first and the second valve bodies respectively, so as to constitute a closed chamber having a wall that is deformable in the actuation direction, and first and second resilient return means for returning the first and second valve members respectively into the closed position; and wherein the first closed chamber of the first piston of the first valve is in communication with the chamber of the second valve, and the closed chamber of the second piston of the second valve is in communication with the chamber of the first valve, wherein the chamber of the first valve and the chamber of the second valve are separated from each other by a wall, said wall having fixed thereon, on a first side inside the chamber of the first valve, the metal wall of the bellows of the first piston, and on a second side inside the chamber of the second valve, the metal wall of the bellows of the second piston, the separation wall of the body of the balancing device having passing therethrough a first channel for putting the first closed chamber of the first piston into communication with the chamber of the second valve, and a second channel putting the closed chamber of the second piston into communication with the chamber of the first valve.