| 摘要 |
The present invention provides a pump (1; 60; 90) for mounting on a receptacle (3), the pump including: an air intake passage formed between the pump body and the moving assembly and capable of communicating with the opening (18) of the pump body; a first lip (40) arranged, after the moving assembly has moved away from a rest position in the substance-dispensing direction, to press in leaktight manner against the pump body and prevent communication between the inside of the receptacle and the pump chamber (6) via the opening (18); and a second lip situated above the first lip when the pump is observed in the head-up position, said second lip being arranged to close the air intake passage when the moving assembly is in its rest position and to release said passage when the moving assembly (5) is displaced in the substance-dispensing direction.
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