| 摘要 |
The present invention relates to fluid dispensers and, more particularly, to hydraulically-driven, pump-like dispensers operable for manually-actuated, operator-controlled discharge of a stored, typically volatile fluid having characteristics that interfere with its ability to be readily contained. Heretofore known mechanically-pumped fluid dispensers for hydraulically discharging a stored fluid have been unable to contain or dispense highly volatile fluids. The present invention overcomes these deficiencies by providing a hand-held dispenser (10) which incorporates a flexible wall (66) or web-like barrier capable of containing a highly volatile fluid while accommodating mechanical and hydraulic dispenser-actuating deformations for initiating or effecting a discharge of the stored fluid. The barrier (66) is formed of a relatively thin wall of polytetrafluoroethylene (PTFE) material having a predetermined thickness selected so as to render the barrier sufficiently flexible for accommodating deformations in accordance with which a discharge of fluid from the dispenser is hydraulically effected. |
