Variable volume peristaltic pump
First Claim
Patent Images
1. A peristaltic pump comprising:
- housing means with an arcuate chamber defined by an arcuate wall;
rotor means coaxially positioned within the arcuate chamber;
a plurality of roller means spaced circumferentially within the arcuate chamber and rotatably attached to the rotor means;
flexible conduit means circumferentially arranged within the arcuate chamber;
adjustable band means circumferentially arranged in the arcuate chamber between the flexible conduit means and the roller means for longitudinally engaging the flexible conduit means; and
,adjusting means for adjusting the effective length of the flexible band means to adjust the extent of flattening of the flexible conduit means against the arcuate chamber wall and thereby adjusting the volumetric capacity thereof.
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Accused Products
Abstract
A peristaltic pump driven by a single speed power source has a fixed length of flexible wall tubing circumferentially positioned between the wall of the inner chamber and an adjustable band. The flexible band has one end fixed to the pump housing and the other to an adjusting screw. Turning the adjusting screw varies the effective length of the adjustable band and consequently the degree of contact with the flexible wall tubing. Increasing the effective length of the adjustable band flattens the tubing against the wall, thereby changing the volumetric capacity of the tubing and delivery rate of the pump. Decreasing the effective length of the adjustable band has the opposite effect.
32 Citations
16 Claims
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1. A peristaltic pump comprising:
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housing means with an arcuate chamber defined by an arcuate wall; rotor means coaxially positioned within the arcuate chamber; a plurality of roller means spaced circumferentially within the arcuate chamber and rotatably attached to the rotor means; flexible conduit means circumferentially arranged within the arcuate chamber; adjustable band means circumferentially arranged in the arcuate chamber between the flexible conduit means and the roller means for longitudinally engaging the flexible conduit means; and
,adjusting means for adjusting the effective length of the flexible band means to adjust the extent of flattening of the flexible conduit means against the arcuate chamber wall and thereby adjusting the volumetric capacity thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification