| 摘要 |
PURPOSE: A pump device is provided to have a reliable function and be simple in design and thus cheap in manufacture. CONSTITUTION: A pump device is disclosed, comprising a supply tube (1) for a liquid with a relatively low head, an accumulator (3) connected to the same via a non-return valve (2), an outlet tube (4) from the accumulator for liquid with a relatively high head, and an outlet valve, provided at the supply tube (1) after the accumulator, which outlet valve opens and shuts an outlet (5) at the supply tube (1). The pump device is primarily characterized in that the outlet valve comprises a damper (6) movable between a position, in which the opening (5) is left open, and a position, in which the opening (5)is closed.
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