Peristaltic pump with occluded tubes - has array of parallel compressible tubes occluded by peripheral rollers on cylindrical rotor

摘要

The peristaltic pump has an array of compressible tubes in parallel coplanar relationship. A cylindrical rotor assembly includes a series of equally spaced rollers around its periphery and is located adjacent one side of the array of tubes. A platen assembly is provided with a first arcuate ledge portion which defines a first pair of spaced occlusion points and a second arcuate ledge portion which defines a second pair of spaced occlusion points. An additional compressible tube containing air extends between the rotor and the first ledge portion. It is then directed back in the opposite direction between the rotor and the second ledge portion, with the downstream end of the tube connected to a junction point in open communication with one of the tubes in the array.