Importance

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Abstract

A displacement device for fluids, in particular liquids has linearly movable displacement bodies which dip into pump chambers and are connected via respectively one connecting rod to crank pins of an externally driven crank shaft, wherein at least two groups of displacement bodies are provided. All the groups each have the same number of displacement bodies and the crank pins for the displacement bodies are arranged distributed around the crank shaft at the same angular distances. The crank pins assigned to one group are arranged with respect to those of the other group each offset by an offset angle β around the crank shaft. Furthermore, the displacement bodies of each group are arranged offset in the axial direction of the crank shaft with respect to those of the other groups and the group displacement bodies are each arranged around the crank shaft at a group offset angle γ with respect to one another. The displacement device enables low pressure pulsations.

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First Claim