| 摘要 |
A fluid dispenser (10) is provided including (a) a flexible receptacle (20), having a closed end (27) and an opposed open end (28), being movable from a collapsed condition to an elongate condition, and having an outer surface defining a helical thread, and (b) a helical spring (25) in threaded engagement with the helical thread to axially compress the receptacle (20). Fluid introduced into said receptacle (20) moves the receptacle from its collapsed condition to its elongate condition, producing tension in the spri ng (25), the tension being effective to move the receptacle (20) from its elongate condition to its collapsed condition to force fluid from the receptacle.
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