Patent ID: 6302305
Filing Date: 2001-10-16
Classification: B05B

Abstract:
A pump to be fitted to a container, the pump comprising a base part secured to the container, and a telescopic assembly which moves axially with respect to the base part and which defines therewith a variable-volume pumping chamber, the telescopic assembly comprising at least one outer sleeve and an inner sleeve sliding in contact with and inside the at least one outer sleeve, the inner and outer sleeves each comprising a dispensing passage, the dispensing passages communicating with each other when the telescopic assembly is in a dispensing configuration to then define an outlet passage allowing product contained in the pumping chamber to be dispensed, the dispensing passages ceasing to communicate with each other when the telescopic assembly is in a filling configuration, the base part comprising a filling orifice through which the product contained in the container can be drawn up to fill the pumping chamber, the telescopic assembly being arranged such that, when the outer sleeve is moved to reduce the volume of the pumping chamber, the telescopic assembly adopts the dispensing configuration and shutoff means shuts off the filling orifice and, when the outer sleeve is moved to increase the volume of the pumping chamber, the telescopic assembly adopts its filling configuration and the shut-off means ceases to shut off the filling orifice.