IV fluid delivery system
First Claim
Patent Images
1. A pump for delivery of fluid through a resilient, deformable tube, comprising:
- a pressure pad;
a plurality of cams associated with a first camshaft;
a plurality of pinchers that are actively driven by the cams of said first camshaft to apply force to deform said tube against said pressure pad and are actively retracted away from said tube by the cams of said first camshaft;
a plurality of cams associated with a second cam shaft;
a plurality of restoring fingers that are actively driven by the cams of said second camshaft to apply force on said tube after deformation of said tube by said pinchers to urge said tube to restore said tube'"'"'s cross-sectional area; and
a motor operatively engaged with said camshafts.
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Accused Products
Abstract
An IV fluid delivery system for use with a resilient, deformable tube, wherein a mechanism is provided to restore the cross-sectional shape of the tube after it has been deformed by a plurality of pinchers, so as to improve the accuracy, consistency, reliability and predictability of flow through the tube.
88 Citations
18 Claims
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1. A pump for delivery of fluid through a resilient, deformable tube, comprising:
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a pressure pad; a plurality of cams associated with a first camshaft; a plurality of pinchers that are actively driven by the cams of said first camshaft to apply force to deform said tube against said pressure pad and are actively retracted away from said tube by the cams of said first camshaft; a plurality of cams associated with a second cam shaft; a plurality of restoring fingers that are actively driven by the cams of said second camshaft to apply force on said tube after deformation of said tube by said pinchers to urge said tube to restore said tube'"'"'s cross-sectional area; and a motor operatively engaged with said camshafts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A pump for delivery of fluid through a resilient, deformable tube, comprising:
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a pressure pad; a plurality of cams associated with a first camshaft; a plurality of pinchers that are actively driven by the cams of said first camshaft to apply force to deform said tube against said pressure pad and are actively retracted away from said tube by the cams of said first camshaft; a plurality of cams associated with a second cam shaft; a pivot shaft; a plurality of opposing restoring fingers that are actively driven by the cams of said second camshaft to pivot about said pivot shaft and apply force from opposed directions on said tube after deformation of said tube by said pinchers to urge said tube to restore said tube'"'"'s cross-sectional area; and a motor operatively engaged with said camshafts. - View Dependent Claims (11, 12, 13, 14)
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15. A pump for delivery of fluid through a resilient, deformable tube, comprising:
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a pressure pad; a plurality of cams associated with a first camshaft; a plurality of pinchers that are actively driven by the cams of said first camshaft to apply force to deform said tube against said pressure pad and are actively retracted away from said tube by the cams of said first camshaft; a plurality of cams associated with a second cam shaft; a pivot shaft; a plurality of restoring fingers that are actively driven by the cams of said second camshaft to pivot about said pivot shaft and apply force on said tube after deformation of said tube by said pinchers to urge said tube to restore said tube'"'"'s cross-sectional area; a biasing device for biasing said restoring fingers against said second camshaft; and a motor operatively engaged with said camshafts. - View Dependent Claims (16, 17, 18)
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Specification