Moineau pump and connection device

摘要

The device (10) has a casing (26) with a channel (30), in which a shaft (28) is arranged, so that it forms an annular channel cross-section. At least one closure element has an elastic wall (32) to close the channel radially, which can be moved from an open position (32a) to a closed position (32b). The closure element is arranged in its open position inside the casing and is controlled from outside. An Independent claim is included for an eccentric screw pump.