20100251813 | DEVICE FOR MONITORING THE CIRCULATION OF A FLUID AT AN OPENING AND CIRCUIT THAT COMPRISES SUCH A DEVICE - A device for monitoring circulation of a fluid at a first opening includes a housing through which fluid passes, the first opening to be monitored, at least a second opening that empties into a chamber of the housing, and a sealing element that can shift or be moved, in a reversible manner, from one closed position in which it seals the first opening to at least one open position in which it releases the opening and allows fluid circulation. The sealing element is capable of being deployed in the chamber, and its movement is controlled by at least one activating element. The sealing element includes a moving body that forms a piston whose one end part is configured to seal the first opening and a portion of membrane is sandwiched between the end part of the moving body and at least the edge that forms a seat of the first opening. | 10-07-2010 |