A PUMPING DEVICE AND A LIQUID INJECTING SYSTEM COMPRISING SUCH A PUMPING DEVICE

摘要

Device for pumping a liquid comprising:
- a rigid core tube (11);
- a flexible tube (10) positioned outside and at least partly around said rigid core tube (11);
- a passage for the liquid from an inlet towards an outlet of the device and comprising a free volume (13) extending between the rigid core (11) and the flexible tube (10); and
- a squeezing arrangement (12) comprising at least one pressing element (40,70,80) capable of acting on the flexible tube (10) so as to alter the shape and/or size of the free volume (13).
Liquid injection system comprising such a device.