One-way valve and vacuum relief device

F - Mech Eng,Light,Heat,Weapons – 16 – K

Patent

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Details

F16K 24/04 (2006.01) B67D 99/00 (2010.01) A47K 5/12 (2006.01) B65D 51/16 (2006.01) B65D 83/00 (2006.01) F16K 17/02 (2006.01) B67D 7/02 (2010.01) B05B 11/00 (2006.01)

Patent

CA 2465468

Liquid dispensers are provided including a vacuum relief mechanism with a vacuum relief device and a one-way valve in series with the vacuum relief device to prevent flow into and out of the reservoir when a vacuum exists in the reservoir. The vacuum relief device comprises an enclosed chamber having an air inlet open to the atmosphere and a liquid inlet in communication with liquid in the reservoir and in which the liquid inlet opens to the chamber at a height below a height at which the air inlet opens to the chamber. The one-way valve is capable of failure, in which case the vacuum relief device alone provides for pressure relief. The vacuum relief valve permits relief of vacuum from the reservoir without moving parts or valves.

Distributeurs de liquides dotés d'un mécanisme casse-vide comprenant un dispositif brise-vide relié en série à une soupape antireflux pour empêcher tout écoulement à l'intérieur ou à l'extérieur du réservoir lorsqu'un vide s'y forme. Le dispositif brise-vide comprend une chambre fermée dotée d'une entrée d'air qui donne sur l'extérieur et d'un orifice d'admission de liquide relié au liquide du réservoir et dans lequel l'orifice d'admission de liquide s'ouvre sur la chambre, à une hauteur inférieure à la hauteur à laquelle l'entrée d'air s'ouvre sur la chambre. En cas de défectuosité de la soupape antireflux, seul le dispositif brise-vide équilibre la pression. Le casse-vide permet de briser le vide dans le réservoir sans recourir à des pièces mobiles ou à des soupapes.

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