DISTRIBUTEUR DE LIQUIDE

摘要

A combined closure and liquid pumping device for a container having a cap adapted to screw onto a threaded spout of the container The closure also includes a pump mechanism having a nozzle connected by a liquid conduit to an inlet within the container. The pump has inlet and outlet check valves in the conduit and a pump chamber connected to the conduit between the valves. The outlet valve is located between the pump and the outlet orifice of the nozzle inwardly or upstream from the nozzle orifice. The nozzle is adjustable on the body of the device and in one adjusted position positively holds the outlet valve closed so that the outlet valve closes off the conduit for disabling liquid pumping operation of the pump and also serves as a static seal to prevent leakage from the container via the liquid conduit. In another adjusted position of the nozzle the outlet valve is free to function as a check valve in the conduit which closes the conduit during the intake stroke of the pump and opens during the ejection stroke of the pump to pass liquid from the conduit through said orifice. The pumping device is also provided with a check valve which permits admission of air through a vent into the container above the liquid during the intake stroke of the pump but closes the vent at all other times to prevent leakage of the liquid from the container through the vent.