Pumpe und Pumpenauslassöffnung

摘要

A pump comprises an inlet for pumping a liquid and an outlet nozzle (12) for dispensing the pumped liquid. The outlet nozzle (12) comprises an outflow opening (20) which includes an outlet valve (18) formed by a valve wall (22) made of a flexible material. In a rest position, the valve wall (22) closes the outflow opening. The valve wall comprises at least three cuts (24) provided in the configuration of a star, each extending from a common point (26) of the valve wall (22) in a radial direction of the outflow opening. The pump further comprises an outlet valve energization element (30) for pressing valve subwalls, formed between the cuts of the valve wall (22), from an inside of the outlet nozzle (12) adjacent to the valve wall (22) in a downstream direction of the outlet nozzle (12), whereby the valve subwalls are bent in the downstream direction and at the cuts between the valve subwalls flow passages (34) are formed for opening the outflow opening for dispensing the pumped liquid. The valve subwalls spring back to the rest position and close the outflow opening again when the outlet valve energization element (30) is moved back in a direction opposite to the downstream direction.