Magnetically balanced finger-type peristaltic pump

摘要

A peristaltic pump includes a plurality of effecters, actuated in a periodic manner upon by obstructive forces of a flexible infusion tube so as flow of infusion fluid is provided along said infusion tube, the magnitude of the obstructive forces being dependent upon the displacement of said moving effecters; and a plurality of balancing magnets providing balancing forces upon one or all the moving effecters, the balancing forces at each point along the path of motion of the moving effecters being of approximately equal magnitude to that of the obstructive forces at the point; such that the parasitic output due to work performed against the obstructive forces is approximately zero and yield is maximized.

主权项

1. A peristaltic pump comprising:
a fluid flow channel including a flexible segment; at least one effecter including a ferrite member and adapted to intermittently compress the flexible segment within said channel, wherein compression of the flexible segment produces a reactive force; at least one electrically triggerable actuator to apply a mechanical force on said effecter; and a balancing member to magnetically interact with said ferrite member in said at least one effecter so that a balancing force proportional to the mechanical force on said effecter is produced to substantially counter said reactive force of the flexible segment.