| 摘要 |
Dispensers comprising dispenser valves are described. In one aspect, the dispenser comprises: a connection for connecting the dispenser to a container for holding dispensable product therein; a dispenser valve comprising a valve outlet having a closure element configured to assume an opened condition when the pressure differential across the dispenser valve reaches a cracking pressure and a closed condition when the pressure differential across the dispenser valve is less than the cracking pressure, the dispenser valve configured to permit flow therethrough in only one direction when the closure element is in the opened condition; and a pump mechanism configured to pump dispensable product from the connection to the dispenser valve and to generate the cracking pressure needed to configure the closure element in the opened condition. In embodiments, the dispenser valve can be provided as a duckbill valve, a reed valve or the like.
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