Apparatus for circulating a liquid along a tubular conduit comprises a peristaltic pump provided with a rotor which acts through the intermediary of rollers, on an elastically deformable tube disposed in series along the mentioned tubular conduit and a device mounted outside on a section of the deformable...http://www.google.ca/patents/US4702675?utm_source=gb-gplus-sharePatent US4702675 - Peristaltic pump provided with a pressure measurement device
