Patent ID: 6026993
Filing Date: 2000-02-22
Classification: B05B,Y10T

Abstract:
A pump for dispensing a liquid, comprising an inlet for pumping the liquid, an outlet nozzle and a liquid flow path extending from the inlet to the outlet nozzle for dispensing the pumped liquid via the outlet nozzle, characterized in that the outlet nozzle comprises an outflow opening which includes an outlet valve, the outlet valve being formed by a valve wall made of a flexible material, which, in a rest position, closes the outflow opening, the valve wall comprising at least three cuts provided in the configuration of a star, each extending from a common point of the valve wall in a radial direction of the outflow opening, and the pump further comprising an outlet valve energization element for pressing valve subwalls, formed between the cuts of the valve wall, from an inside of the outlet nozzle adjacent to the valve wall in a downstream direction of the outlet nozzle, so that said valve subwalls are bent in the downstream direction and at the cuts between the valve subwalls flow passages are formed for opening the outflow opening for dispensing the pumped liquid, while the valve subwalls spring back to the rest position and close the outflow opening again when the outlet valve energization element is moved back in a direction opposite to the downstream direction.