Reducing power consumption in a peristaltic pump mechanism

Details Reducing power consumption in a peristaltic pump mechanism Reducing power consumption in a peristaltic pump mechanism

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 43/12 (2006.01) F04B 43/08 (2006.01) F04B 49/06 (2006.01)

Patent

CA 2395440

The present invention utilizes a torque compensation system and a power control feedback system to reduce power consumption in a linear peristaltic pump. The linear peristaltic infusion pump includes an electric motor, which is connected to a cam shaft with multiple cams positioned thereon. Numerous elongate fingers cooperate with the cams to partly occlude an intravenous drip tube at multiple points along the tube's path. A torque compensation system and power feedback control system reduce the overall power consumption of the pump. A torque compensation cam positioned on the cam shaft, in combination with a torque compensation cam follower and a mechanical spring assist the motor while it is working against a rising cam follower. The power feedback control system comprises a controller which optimally adjusts the power supplied to the drive means so as to reduce overall power consumption of the pump.

L'invention concerne système de pompe à perfusion (1) comprenant un moteur pas-à-pas (2) relié à un arbre à cames (4) via un jeu d'engrenages de réducteur (6). Le moteur pas-à-pas (2) entraîne l'arbre à cames (4) comprenant plusieurs cames (8) situées sur l'arbre à diverses positions espacées autour de l'arbre (4). Ces cames (8) sont reliées à des doigts suiveurs (10) qui compriment plusieurs parties d'un tube de goutte-à-goutte (12) intraveineux (IV) situé parallèle à l'arbre à cames (4). Une poche de goutte-à-goutte (22) intraveineux (IV) contient le fluide qui s'écoule vers le patient via le tube (12). Le tube (12) est placé manuellement dans le mécanisme via la plaque ou la porte de retenue (16). Ainsi, le fluide intraveineux pénétrant dans le tube (12) est injecté à travers la pompe (1) à un débit régulé avec précision en rapport direct avec le régime du moteur pas-à-pas.

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