System and method for holding tubing for a peristaltic pump

摘要

A system and method for holding tubing for a peristaltic pump that allows for tube stretch or deformation. The present invention compensates for tube stretching and holds the tubing in the elongated position using a one way bearing clutch. Drip retention or a reversal of the pump does not allow the tube to move back into the pump. An encoder can monitor tube elongation and allow metering the tubing during indexing.

主权项

1. A peristaltic pump tube holding system that allows tube elongation but prevents tubes from moving backwards comprising:
a frame holding a peristaltic pump having an input and output; a pair of substantially cylindrical rollers on roller clutches mounted on said frame, said rollers having longitudinal teeth and positioned to cooperate with said peristaltic pump by clamping a peristaltic pump tube between them; said pair of substantially cylindrical rollers on roller clutches being located at the input or output of the pump; the roller clutches existing in a pair where a top clutch is orientated so that tube elongation can occur, and a lower clutch also oriented so that tube elongation can occur, the upper and lower roller clutches being mounted in opposite directions; the roller clutches enabling tube elongation when the pump operates in a forward direction, but holding, and not allowing elongation, when the pump is operated in a reverse direction for drip retention; at least one of said rollers on roller clutches being attached to a negator spring located in a string pot, said negator spring assisting in providing force between the rollers for small tubing to assist in elongation; the rollers having at least one concave region on an outer surface so that the peristaltic pump tube or tubes center or take predetermined positions between the rollers; at least one of said rollers on roller clutches being attached to a motor providing force between the rollers.