Disposable fluid infusion pumping chamber cassette and drive mechanism thereof

THE PUMPING CASSETTE (10) IS ADAPTED TO BE DRIVEN THROUGH A PUMP DRIVE WHICH HAS A PISTON AND VALVE MECHANISMS AND INCLUDES A CASSETTE INLET (64), A CASSETTE OUTLET AND A ROAD FOR THE FLUID BETWEEN. THE CASSETTE (10) HAS A RIGID REAR MEMBER (14) THAT HAS A HOLE THAT FORMS A PUMPING CHAMBER ALONG THE FLUID PATH, A RIGID FACE (14) THAT HAS AN OPENING FOR THE PUNCH THROUGH THE CHAMBER OF PUMPING TO ALLOW PASSAGE AND VALVE MECHANISMS TO ALLOW THE VALVE TO CONTROL FLUID FLOW THROUGH THE FLUID CHAMBER AND AN ELASTIC MEMBER (16) LOCATED BETWEEN THE FACE AND THE REAR PART (12, 14). THERE ARE SOME AIR DETECTION MEMBERS PROJECTING FROM THE FACE (12) TO DETECT THE PRESENCE OF AIR IN THE CASSETTE (10).