A closing member 3 is equipped with a dispensing valve 8 and a filter 7. The valve 8 is deformed resiliently to shift its valve head 82 downstream with its orifice 82a remaining closed if pressure less than a first predetermined pressure and more than a second predetermined pressure is acted on the inner...http://www.google.fr/patents/US6672479?utm_source=gb-gplus-shareBrevet US6672479 - Closing structure of a dispensing container
