Infusion pump system
First Claim
1. A valved pumping chamber for use in an infusion delivery pump system including first and second magnetic means and a pump actuating means including a reciprocal operating member, said pumping chamber operating between an upstream portion and a downstream portion of the infusion delivery system comprising:
- an inlet port;
an inlet fluid passage means interconnecting with said pumping chamber;
an inlet valve seat having a bore in said inlet fluid passage means;
magnetically permeable flow restricting means constructed and arranged to be biased against said inlet valve seat under the magnetomotive force of said magnetic means;
means for providing substantially constant and continuous magnetic force located outside of said inlet fluid passage means which maintain said magnetically permeable flow restricting means in proximity to said inlet valve seat;
a pumping chamber defining a cavity and flexible means adapted to be engaged by said reciprocal operating member to change the internal volume of said pumping chamber;
an outlet port;
an outlet fluid passage means interconnecting with said pumping chamber;
an outlet valve seat having a central bore disposed in said outlet fluid passage means;
magnetically permeable flow restricting means constructed and arranged to be biased against said outlet valve seat under the magnetomotive force of said second magnetic means; and
means for providing a substantially constant and continuous magnetic force located outside of said outlet fluid passage means which maintain said magnetically permeable flow restricting means in proximity to said outlet valve seat.
1 Assignment
0 Petitions
Accused Products
Abstract
An infusion pump system is described containing a valved cassette which is used as a pumping chamber for conducting fluid from an upstream portion to a downstream portion of the system. The removable cassette contains magnetically biased valves at both ends. Externally mounted magnets bias the valves within the cassette to provide an opening of the inlet valve and closing of the output valve during the fill cycle and closing of the inlet valve and opening of the outlet valve during the pump cycle. Free flow of infusion fluid is allowed when the valved cassette is removed from the pump mounting member which houses the actuating magnets and the reciprocating actuator for the pumping chamber.
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Citations
58 Claims
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1. A valved pumping chamber for use in an infusion delivery pump system including first and second magnetic means and a pump actuating means including a reciprocal operating member, said pumping chamber operating between an upstream portion and a downstream portion of the infusion delivery system comprising:
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an inlet port; an inlet fluid passage means interconnecting with said pumping chamber; an inlet valve seat having a bore in said inlet fluid passage means; magnetically permeable flow restricting means constructed and arranged to be biased against said inlet valve seat under the magnetomotive force of said magnetic means; means for providing substantially constant and continuous magnetic force located outside of said inlet fluid passage means which maintain said magnetically permeable flow restricting means in proximity to said inlet valve seat; a pumping chamber defining a cavity and flexible means adapted to be engaged by said reciprocal operating member to change the internal volume of said pumping chamber; an outlet port; an outlet fluid passage means interconnecting with said pumping chamber; an outlet valve seat having a central bore disposed in said outlet fluid passage means; magnetically permeable flow restricting means constructed and arranged to be biased against said outlet valve seat under the magnetomotive force of said second magnetic means; and means for providing a substantially constant and continuous magnetic force located outside of said outlet fluid passage means which maintain said magnetically permeable flow restricting means in proximity to said outlet valve seat. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A valved pumping chamber for use in an infusion delivery pump including outlet magnetic means and a pump actuating means including a reciprocal operating member, said pumping chamber operating between an upstream portion and a downstream portion of the infusion delivery system comprising:
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an inlet port; an inlet fluid passage means interconnecting with said pumping chamber; a flapper valve disposed in said inlet fluid passage; a pumping chamber defining a cavity and flexible means adapted to be engaged by said reciprocal operating member to change the internal volume of said pumping chamber; an outlet port; an outlet fluid passage means interconnecting with said pumping chamber; an outlet valve seat having a central bore disposed in said outlet fluid passage means; magnetically permeable flow outlet restricting means constructed and arranged to be biased against said outlet valve seat under the magnetomotive force of said outlet magnetic means; and means for providing a substantially constant and continuous magnetic force located outside of said outlet fluid passage means which maintain said magnetically permeable flow restricting means in proximity to said outlet valve seat. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. An infusion pump of the diaphragm type comprising:
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a mounting member; first and second magnetic means; a plunger member;
said first and second magnetic means and said plunger member operatively positioned in said mounting member with said plunger member therebetween;means constructed and arranged to move said plunger member in said mounting member in a reciprocal manner; a valved pumping chamber comprising; an inlet port; an inlet fluid passage means interconnecting with said pumping chamber; an inlet valve seat having a central bore in said inlet fluid passage means; magnetically permeable flow restricting means constructed and arranged to be biased against said inlet valve seat under the magnetomotive force of said first magnetic means; means for providing a substantially constant and continuous magnetic force located outside of said inlet fluid passage means which maintain said magnetically permeable flow restricting means in proximity to said inlet valve seat; a pump chamber defining a cavity and flexible means adapted to be engaged by said reciprocal plunger to change the internal volume of said pumping chamber; an outlet port; an outlet fluid passage means interconnecting with said pumping chamber; an outlet valve seat having a central bore disposed in said outlet fluid passage means; magnetically permeable flow restricting means constructed and arranged to be biased against said outlet valve seat under the magnetomotive force of said second magnetic means; means for providing a substantially constant and continuous magnetic force located outside of said outlet fluid passage means said magnetically permeable flow restricting means in proximity to said outlet valve seat; a compartment constructed and arranged in said mounting member to receive said pumping chamber and positioned to axially align said flexible diaphragm with the line of travel of the said plunger member; said first and second magnetic means positioned to bias said magnetically permeable flow restricting means against said inlet and outlet valve seats under the magnetomotive force of said first and second magnetic means. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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44. An infusion pump of the diaphragm type comprising:
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a mounting member; outlet magnetic means; a plunger member; said outlet magnetic means and said plunger member operatively positioned in said mounting member; means constructed and arranged to move said plunger member in said mounting member in a reciprocal manner; a valve pumping chamber comprising; an inlet port; an inlet fluid passage means interconnecting with said pumping chamber; a flapper valve disposed in said inlet fluid passage; a pump chamber defining a cavity and flexible means adapted to be engaged by said reciprocal plunger to change the internal volume of said pumping chamber; an outlet port; an outlet fluid passage means interconnecting with said pumping chamber; an outlet valve seat having a central bore disposed in said outlet fluid passage means; magnetically permeable flow restricting means constructed and arranged to be biased against said outlet valve seat under the magnetomotive force of said outlet magnetic means; means for providing a substantially constant and continuous magnetic force located outside of said outlet fluid passage means which maintain said magnetically permeable flow restricting means in proximity to said outlet valve seat; and a compartment constructed and arranged in said mounting member to receive said pumping chamber and positioned to axially align said flexible diaphragm with line oftravel of the said plunger member; said outlet magnetic means positioned to bias said magnetically permeable flow restricting means against said outlet valve seat under the magnetomotive force of said outlet magnetic means. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58)
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Specification