Finger-type peristaltic pump comprising a ribbed anvil
The present invention discloses a finer-type peristaltic infusion pump comprising a ribbed anvil. More specifically, a finger-type peristaltic pump, comprising a plurality of pressing-fingers, infusion-tube, and a passive interfacing mechanism is disclosed. The passive interfacing mechanism comprises of means for accommodating said flexible infusion tube and mounting the tube in a location suitable for the pressing-fingers to apply an approximated perpendicular force on said tube to squeeze it; a ribbed anvil rigidly supporting the tube on opposite side to the pressing fingers when it is pressed by said finger; said anvil comprising a plurality of ribs selected from one or more ribs of a group including a plurality of ribs oriented to face said fingers' tip, a plurality of ribs located in between said fingers, or any combination thereof.
1. A finger-type peristaltic pump (DDS), comprising a plurality of pressing-fingers, a tube, and a passive interfacing mechanism; wherein said passive interfacing mechanism comprises (a) a channel for accommodating said tube and mounting said tube in a location suitable for said pressing-fingers to apply substantially perpendicular force on said tube; (b) a ribbed anvil rigidly supporting said tube on opposite side to said pressing fingers, wherein said anvil includes at least one fixed protruding rib located at a defined position relative to at least one of said fingers; and
wherein by changing the heights of one or more of said ribs it is possible to calibrate the squeezed volume of the infused fluid per pumping cycle, said squeezed volume is defined by ribs of a nominal height, so as the ratio between squeezed volume per revolution and the speed of the pumping mechanism can be calibrated.
2. The finger-type peristaltic pump according to claim 1 , wherein one or more of said ribs is of a different width as compared with others ribs (reference ribs), so as less pressing force is required by a given finger for shutting off said infusion-tube against narrower ribs, as compared with reference ribs of wider width, and vice versa, more force is required for pressing said tube by a given finger against wider ribs as compared with reference narrower ribs.
3. The finger-type peristaltic pump according to claim 1 , wherein one or more of said ribs is of a different width as compared with others ribs (reference ribs), so as squeezed volume of the infused fluid per pumping cycle can be calibrated.
4. The peristaltic pump of claim 1 , wherein said anvil includes one or more fixed protruding ribs between said pressing fingers to achieve a predetermined flow rate through the tube.
5. The peristaltic pump of claim 1 , wherein said anvil includes one or more fixed protruding ribs substantially across from one or more of said fingers tips to decrease the force required by pressing fingers to close the tube.