PERISTALTIC PUMP WITH LINEAR FLOW CONTROL
First Claim
1. A peristaltic pump, comprising:
- a conduit having a first end for receiving a fluid from a reservoir and a second end for delivering the fluid;
a plurality of fingers, which are disposed at respective locations along a segment of the conduit and are configured to alternately compress and release the conduit at the locations;
a cyclical pump mechanism, which is coupled to move the fingers between respective compressed and released positions in a spatio-temporal pattern so as to drive a predetermined quantity of the fluid through the segment of the conduit in each pump cycle;
a motor, which is coupled to drive the pump mechanism; and
a controller, which is coupled to activate and deactivate the motor in alternation during each pump cycle with a duty cycle that varies within the pump cycle.
1 Assignment
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Accused Products
Abstract
A peristaltic pump includes a conduit having a first end for receiving a fluid from a reservoir and a second end for delivering the fluid. A plurality of fingers are disposed at respective locations along a segment of the conduit and are configured to alternately compress and release the conduit at the locations. A cyclical pump mechanism is coupled to move the fingers between respective compressed and released positions in a spatio-temporal pattern so as to drive a predetermined quantity of the fluid through the segment of the conduit in each pump cycle. A motor is coupled to drive the pump mechanism. A controller is coupled to activate and deactivate the motor in alternation during each pump cycle with a duty cycle that varies within the pump cycle.
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Citations
17 Claims
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1. A peristaltic pump, comprising:
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a conduit having a first end for receiving a fluid from a reservoir and a second end for delivering the fluid; a plurality of fingers, which are disposed at respective locations along a segment of the conduit and are configured to alternately compress and release the conduit at the locations; a cyclical pump mechanism, which is coupled to move the fingers between respective compressed and released positions in a spatio-temporal pattern so as to drive a predetermined quantity of the fluid through the segment of the conduit in each pump cycle; a motor, which is coupled to drive the pump mechanism; and a controller, which is coupled to activate and deactivate the motor in alternation during each pump cycle with a duty cycle that varies within the pump cycle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for fluid delivery, comprising:
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providing a peristaltic infusion pump comprising a cyclical pump mechanism and a motor coupled to drive the pump mechanism; and driving the pump to deliver a fluid by activating and deactivating the motor in alternation during each pump cycle with a duty cycle that varies within the pump cycle. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A peristaltic pump having a pump cycle and comprising:
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a conduit, comprising an elastic material, having a first end for receiving a fluid from a reservoir and a second end for delivering the fluid; a plurality of fingers, which comprise magnets and are disposed at respective locations along a segment of the conduit and are configured to alternately compress and release the conduit at the locations, whereby the conduit exerts a first force against the fingers in response to compression of the conduit; a ferromagnetic frame, which exerts a second force on the magnets, opposite to and balancing the first force during the pump cycle; a cyclical pump mechanism, which is coupled to move the fingers between respective compressed and released positions in a spatio-temporal pattern so as to drive a predetermined quantity of the fluid through the segment of the conduit in each pump cycle; a motor, which is coupled to drive the pump mechanism; and a controller, which is coupled to activate and deactivate the motor in alternation during each pump cycle with a duty cycle that varies within the pump cycle.
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Specification