Patent ID: 6164921
Filing Date: 2000-12-26
Classification: A61M,F04B

Abstract:
A curvilinear peristaltic pump, comprising:a housing including a support member having first and second recesses disposed therein;a platen member attached to the housing;a rotatable cam disposed within the housing;a drive unit disposed within the housing and mechanically coupled to the cam, the activation of the drive unit resulting in the concurrent rotation of the cam in a first direction;a plurality of pump fingers movably attached to the housing, each of the pump fingers having a first end which is cooperatively engaged to the cam and a second end which is disposed in spaced relation to the platen member, the cam being configured to sequentially move the pump fingers radially outwardly toward and inwardly away from the platen member when rotated in the first direction by the drive unit; anda tubing assembly releasably attachable to the housing and comprising:a length of resilient tubing;a tubing locator pin attached to the tubing and removably insertable into the first recess; anda shut-off valve attached to the tubing and removably insertable into the second recess, the shut-off valve being operable to selectively obstruct the flow of liquid through the turbing in a direction opposite the first direction;wherein the tubing locator pin and the shut-off valve are attached to the tubing at locations whereat a portion of the tubing is extended over the second ends of the pump fingers when the tubing locator pin and the shut-off valve are removably inserted into respective ones of the first and second recesses within the support member of the housing, the tubing being extensible between the second ends and the platen member such that the sequential movement of the pump fingers toward and away from the platen member results in liquid within the tubing being pumped in the first direction of rotation of the cam.