An improved peristaltic pump is described wherein the basic configurations of movable pump rollers, a base member and pump tubing compressed by the pump rollers against the spring loaded movable base member is improved by the addition of at least one actuating member capable of movement toward and away...http://www.google.de/patents/US4025241?utm_source=gb-gplus-sharePatent US4025241 - Peristaltic pump with tube pinching members capable of biasing the tubing away from the pump rollers
