| 摘要 |
PCT No. PCT/SE97/01768 Sec. 371 Date Jun. 15, 1999 Sec. 102(e) Date Jun. 15, 1999 PCT Filed Oct. 23, 1997 PCT Pub. No. WO98/17920 PCT Pub. Date Apr. 30, 1998A pump device is disclosed, comprising a supply tube 1, for a liquid with a relatively low head, an accumulator 3 connected to supply tube 1 via a one-way 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. |
