Peristaltic pump having independently adjustable cartridges
First Claim
Patent Images
1. A peristaltic pump comprising:
- a drive unit including a stationary frame and a rotor supported on said frame for rotation; and
a plurality of removable cartridges disposed side-by-side on said drive unit;
said rotor having a generally horizontal axis and including rotatable support means and a plurality of elongated, parallel rollers, said rollers being carried by said rotatable support means in a circular path about the axis of the rotor, each roller further having its own axis of rotation and being rotatable thereabout;
each of said removable cartridges comprising a three-side cartridge frame which includes first and second generally vertical side members and a generally horizontal top member connecting said side members, a generally horizontal occlusion bed disposed between said side members and mounted in slidable engagement with the inner surfaces of said side members, and adjustment means for adjusting the position of said occlusion bed to enable precise selection of the degree of occlusion;
each of said removable cartridges being configured for cooperation with said drive unit so that for each cartridge a length of flexible tubing may be supported between the occlusion bed and the rotor to enable effectuation of peristaltic pumping of fluid through said length of tubing by rotation of said rotor;
each said occlusion bed having a pressure surface which approximately defines a radius about the axis of said rotor;
said adjustment means being operative to displace said occlusion bed in rectilinear motion.
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Accused Products
Abstract
A peristaltic pump having a plurality of removable cartridges, each containing a length of tubing, and each having means for adjusting occlusion comprising a linearly displaceable occlusion bed. Tubing retainers on each cartridge stabilize the tubing segments to constrain them against longitudinal displacement during pumping. Means are provided to enable visual determination of occlusion adjustment through the top of each cartridge. Each of the cartridges is reversible, and is readily installed on the pump frame and retained thereon by a snap-lock mechanism.
187 Citations
12 Claims
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1. A peristaltic pump comprising:
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a drive unit including a stationary frame and a rotor supported on said frame for rotation; and a plurality of removable cartridges disposed side-by-side on said drive unit; said rotor having a generally horizontal axis and including rotatable support means and a plurality of elongated, parallel rollers, said rollers being carried by said rotatable support means in a circular path about the axis of the rotor, each roller further having its own axis of rotation and being rotatable thereabout; each of said removable cartridges comprising a three-side cartridge frame which includes first and second generally vertical side members and a generally horizontal top member connecting said side members, a generally horizontal occlusion bed disposed between said side members and mounted in slidable engagement with the inner surfaces of said side members, and adjustment means for adjusting the position of said occlusion bed to enable precise selection of the degree of occlusion; each of said removable cartridges being configured for cooperation with said drive unit so that for each cartridge a length of flexible tubing may be supported between the occlusion bed and the rotor to enable effectuation of peristaltic pumping of fluid through said length of tubing by rotation of said rotor; each said occlusion bed having a pressure surface which approximately defines a radius about the axis of said rotor; said adjustment means being operative to displace said occlusion bed in rectilinear motion. - View Dependent Claims (2)
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3. A peristaltic pump comprising:
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a drive unit including a stationary frame and a rotor supported on said frame for rotation; and a plurality of removable cartridges disposed side-by-side on said drive unit; said rotor having a generally horizontal axis and including rotatable support means and a plurality of elongated, parallel rollers, said rollers being carried by said rotatable support means in a circular path about the axis of the rotor, each roller further having its own axis of rotation and being rotatable thereabout; each of said removable cartridges comprising a three-sided cartridge frame which includes first and second generally vertical side members and a generally horizontal top member connecting said side members, a generally horizontal occlusion bed disposed between said side members in slidable relation thereto, and adjustment means for adjusting the position of said occlusion bed; said occlusion bed having at least one substantially planar, non-horizontal, upwardly-facing camming surface thereon, and said adjustment means including at least one wedge supported for horizontal displacement relative to said cartridge in sliding contact with said camming surface, and displacement means for varying precisely the position of said wedge, and thereby the position of said occlusion bed; each of said removable cartridges being configured for cooperation with said drive unit so that for each cartridge a length of flexible tubing may be supported between the occlusion bed and the rotor to enable effectuation of peristaltic pumping of fluid through said length of tubing by rotation of said rotor; each said occlusion bed having a pressure surface which approximately defines a radius about the axis of said rotor; said adjustment means being operative to displace said occlusion bed in rectilinear motion; said displacement means comprising a horizontal screw mounted for rotation on said cartridge frame and constrained against axial movement relative thereto, and a threaded bore disposed within said wedge in threaded engagement with said screw. - View Dependent Claims (4, 5)
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6. A peristaltic pump comprising:
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a drive unit including a stationary frame and a rotor supported on said frame for rotation; and a plurality of removable cartridges disposed side-by-side on said drive unit; said rotor having a generally horizontal axis and including rotatable support means and a plurality of elongated, parallel rollers, said rollers being carried by said rotatable support means in a circular path about the axis of the rotor, each roller further having its own axis of rotation and being rotatable thereabout; each of said removable cartridges comprising a three-sided cartridge frame which includes first and second generally vertical side members and a generally horizontal top member connecting said side members, a generally horizontal occlusion bed disposed between said side members in slidable relation thereto, and adjustment means for adjusting the position of said occlusion bed; each of said removable cartridges being configured for cooperation with said drive unit so that for each cartridge a length of flexible tubing may be supported between the occlusion bed and the rotor to enable effectuation of peristaltic pumping of fluid through said length of tubing by rotation of said rotor; each said occlusion bed having a pressure surface which approximately defines a radius about the axis of said rotor; said adjustment means being operative to displace said occlusion bed in rectilinear motion; said frame of said drive unit including a pair of rods extending substantially parallel to the axis of said rotor and each said cartridge including means near the lower ends of its side members for engaging said rods; each said cartridge including a pair of tubing retainers, each tubing retainer being effective to engage a portion of a length of tubing to limit longitudinal displacement of said length of tubing, each said tubing retainer having a V-shaped notch therein with a corner edge for engaging said length of tubing and pressing said length of tubing against a respective one of said rods. - View Dependent Claims (7, 8, 9)
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10. A cartridge for a peristaltic pump comprising a three-side frame which includes first and second generally vertical side members and a generally horizontal top member connecting said side members, a generally horizontal occlusion bed disposed between said side members in slidable relation thereto, and adjustment means for adjusting the vertical position of said occlusion bed relative to the cartridge frame;
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said occlusion bed having a pressure surface having a predetermined internal radius over a major portion of its length; said adjustment means being operative to effect reversible rectilinear displacement of said occlusion bed; said occlusion bed having at least one substantially planar, non-horizontal upwardly-facing camming surface thereon; and
said adjustment means including at least one wedge supported for horizontal displacement away from one of said side members toward the other of said side members in sliding contact with said camming surface, and displacement means for varying the position of said wedge and thereby the position of said occlusion bed;whereby the cartridge, when in operation in combination with a pump frame and rotor, enables approximately uniform adjustments of occlusion along the pressure surface. - View Dependent Claims (11)
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12. A peristaltic pump comprising:
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a stationary frame; a plurality of cartridges supported by said stationary frame in side-by-side relation; a plurality of tubing segments, each tubing segment being associated with a respective one of said cartridges; a rotor supported on said stationary frame and acting in combination with said cartridges to effect peristaltic pumping action in said tubing segments, said roller including a plurality of rollers extending the length of said rotor and a plurality of guard members disposed between said rollers; and drive means for imparting rotation to said rotor; each said cartridge comprising a three-sided cartridge frame which includes first and second generally vertical side members and a generally horizontal top member connecting said side members, a generally horizontal occlusion bed disposed between said side members in slidable relation thereto, and adjustment means for adjusting the vertical position of said d occlusion bed relative to the cartridge frame, said occlusion bed having a pressure surface having a predetermined internal radius over a major portion of its length; each of said tubing segments being disposed between the rotor and the pressure surface of the occlusion bed of a respective one of said cartridges; said adjustment means being operative to effect reversible rectilinear displacement of said occlusion bed so as to enable approximately uniform adjustments of occlusion along the pressure surface; said stationary frame including stationary guard means extending beneath said rotor to partially shield said rotor.
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Specification