Patent ID: 6230732
Filing Date: 2001-05-15
Classification: B60K,F16K,Y10T

Abstract:
Safety valve for venting a liquid tank, comprising means for:(a) ventilating the tank, including when the latter is inclined with respect to the initial position for which it was designed;(b) preventing liquid from being ejected from the tank if the latter is inclined or if waves of liquid are produced inside the tank;(c) automatically closing the tank of the latter is inverted;(d) adjusting the useful volume of the tank and preventing the tank from being filled beyond a predetermined level;(e) allowing gas to escape from the tank during filling thereof;said safety valve comprising a valve element equipped with at least one flexible seal which can deform and open in the event of an excessive pressure difference between the inside of the tank and the outside and provide safety ventilation of the tank when the latter exhibits a depression or an overpressure that exceeds a given threshold with respect to the external pressure.