| 摘要 |
The present invention relates to a pump device, comprising: a first diaphragm pump head having two or an integral multiple of two fluid delivery chambers and diaphragms associated therewith, which are hydraulically couple d to a second diaphragm pump head, !the second diaphragm pump head having two additional fluid delivery chamber s and additional membranes associated therewith, which are drivable by a double- acting piston via associated diaphragm control chambers, a refilling valve being connected in each case to the diaphragm control chambers and the diaphragm control chambers being temporarily impinged with a diaphragm contr ol pressure (p2), which is greater than atmospheric pressure, using the refilli ng valve. The piston may thus be activated using a relatively small force to achieve a delivery action.
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