Patent ID: 8186545
Filing Date: 2012-05-29
Classification: B67D,G01F

Abstract:
1. A valve for metering a liquid or powdery product, which comprises: a fixed conduit for feeding the product, which has an upper end conformed as an end piece for its connection to tubing for bringing in the product, and a lower end for dispensing the product, this conduit defining at its lower end, an aperture for letting through the product; a closure member positioned at the lower end of the conduit; a coaxial sleeve mounted on the outside of the conduit, which has a lower end conformed as a valve seat, this sleeve delimiting together with the conduit, at its lower end, a chamber into which said aperture opens out, said sleeve being translationally displaceable relatively to the conduit between a closed position in which the valve seat tightly cooperates with the closure member, and an open position in which the valve seat is spaced apart from the closure member in order to allow the product to flow, wherein said chamber is delimited firstly by the valve seat, and secondly by a seal ring interposed between the conduit and the sleeve thereby allowing for the chamber to be filled with pressurized fluid and wherein said seal ring is interposed between the conduit and the sleeve so as to provide tightness for all relative positions between the conduit and the sleeve.