A fluid delivery mechanism with tube having two occluders and an intermediate compression zone

摘要

An infusion pump for providing a flow of a liquid through a tube (28). The infusion pump includes at least two occluders (152, 162) having an open position and a closed position for releasably pinching-off the tube (28). A metering chamber is disposed between the two occluders (152, 162). A first plunger (72) and a second plunger (73) are provided, each plunger (72, 73) having an open position and a closed position for releasably compressing the metering chamber. A first occluder (152) releasably pinches-off the tube near the source of the liquid at a first location. The second occluder (162) releasably pinches-off the tube at a second location that is downstream from the source of the liquid (23) and the first location. The tube (28) is released at the first location and a plunger (72) compresses the tube (28) between the first location and the second location, thereby generating a flow of the liquid through the tube (28) in a direction towards the source of liquid (23).