| 摘要 |
A reservoir pump assembly for use with a container having a fill opening and an interior includes an annular, elongate reservoir casing configured for being inserted into the fill opening of the container and for being disposed substantially entirely within the interior of the container. The reservoir casing defines a pressure chamber configured for containing fluid under pressure. An annular, elongate guide cylinder is disposed substantially entirely within the pressure chamber and defines an inlet orifice and an outlet orifice. The outlet orifice interconnects the guide cylinder and the pressure chamber. The inlet orifice interconnects the guide cylinder and the interior of the container. An inlet valve is associated with the inlet orifice, and an outlet valve is associated with the outlet orifice. An elongate pump rod is disposed partially within the guide cylinder and is configured for reciprocating movement therein. The pump rod has a first end and a second end. The first end is disposed within the guide cylinder, and the second end extends from the guide cylinder. A plunger is attached to the first end and is configured for sealingly engaging an inside surface of the guide cylinder. The pump rod is movable in a first direction to draw fluid from the interior of the container into the guide cylinder and movable in a second direction to expel fluid from the guide cylinder into the pressure chamber. A discharge tube is disposed partially within the pressure chamber and defines a passageway for the fluid to exit the pressure chamber.
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