| 摘要 |
<p>A gravitationally assisted liquid pump assembly (10) for pumping a liquid from a liquid supply (12) to a reservoir (14) located at a level higher than the assembly (10) is provided. The assembly (10) comprising a variable volume supply chamber (16) in communication with a supply conduit (18) for supplying a volume of liquid from the supply chamber (16) to the reservoir (14) and a return conduit (22) for returning a volume of liquid from the reservoir (14) to a variable volume return chamber (20). The volume of the supply chamber (16) and the volume of the return chamber (20) interact so that a decrease in the volume of the supply chamber (16) is substantially equal to the volume of liquid returned from the reservoir (14) to the return chamber (20) so that pressure generated by the weight of liquid in the return conduit (22) is transferred to the liquid in the supply chamber (16) to at least partially balance the weight of liquid in the supply conduit (18).</p> |
