US4747828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
IV fluid line occlusion detector
Assignee: CareFusion 303 Inc
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Filing: 1986-12-09
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Granted: 1988-05-31
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Expires: 2006-12-09
Abstract
Abstract A detector for determining when an occlusion has occurred in the fluid line of an IV administration set comprises means associated with an IV infusion pump to determine the resistive force exerted by fluid in the line against the pumping mechanism of the pump. The detector includes a flexible beam which is mounted between the plunger and the activator of the pumping mechanism and which bends proportionately to the magnitude of the resistive force. A strain gauge attached to the beam activates an alarm which stops the IV pump when flexure of the beam indicates an occlusion in the line has occurred.
Inventors
- 👤 Gus G. Tseo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:56
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/168; A61M5/16831; A61M5/16854; A61M5/142; A61M5/145; A61M5/1452; A61M5/1456
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
102 words
An occlusion detector in combination with a fluid line for use with an IV administration system which comprises: means associated with said fluid line for pumping fluid therethrough; an actuator for driving said pumping means; a beam operatively connecting said actuator to said pumping menas, said beam being positioned to flex in proportion to the resistive force transmitted by the fluid against said pumping means; means mounted on said beam for measuring the flexure of said beam; and means connected with said measuring means for stopping said pumping means when the flexure of said beam indicates a resistive force of predetermined value.
Claim 2
Dependent Claim
102 words
An occlusion detector in combination with a fluid line for use with an IV administration system which comprises: means associated with said fluid line for pumping fluid therethrough; an actuator for driving said pumping means; a beam operatively connecting said actuator to said pumping menas, said beam being positioned to flex in proportion to the resistive force transmitted by the fluid against said pumping means; means mounted on said beam for measuring the flexure of said beam; and means connected with said measuring means for stopping said pumping means when the flexure of said beam indicates a resistive force of predetermined value.
Claim 3
Dependent Claim
18 words
An occlusion detector as recited in claim 1 wherein said beam flexure measuring means is a strain gauge.
Claim 4
Dependent Claim
20 words
An occlusion detector as recited in claim 2 further comprising means for constraining said pumping means to substantially linear movement.
Claim 5
Dependent Claim
17 words
An occlusion detector as recited in claim 3 further comprising an actuator for driving said pumping means.
Claim 6
Dependent Claim
36 words
An occlusion detector as recited in claim 4 wherein said beam has a first end and a second end with said first end mounted on said pumping means and said second end mounted on said actuator.
Claim 7
Dependent Claim
29 words
An occlusion detector as recited in claim 5 wherein said beam is positioned with its longitudinal axis substantially perpendicular to the direction of linear movement of said pumping means.
Claim 8
Dependent Claim
21 words
An occlusion detector as recited in claim 6 wherein said pumping means is disposed for reciprocal linear movement with said actuator.
Claim 9
Dependent Claim
21 words
An occlusion detector as recited in claim 7 wherein said pumping means is disposed for reciprocal linear movement with said actuator.
Claim 10
Dependent Claim
72 words
An IV fluid line occlusion detector which comprises: a pumping chamber in fluid communication with said fluid line; a plunger disposed within said chamber; an actuator for moving said plunger to pump fluid through said chamber; a flexible beam having a first end attached to said plunger and a second end attached to said actuator; means mounted on said beam for measuring means to alarm when said beam obtains a predetermined deflection.
Claim 11
Dependent Claim
72 words
An IV fluid line occlusion detector which comprises: a pumping chamber in fluid communication with said fluid line; a plunger disposed within said chamber; an actuator for moving said plunger to pump fluid through said chamber; a flexible beam having a first end attached to said plunger and a second end attached to said actuator; means mounted on said beam for measuring means to alarm when said beam obtains a predetermined deflection.
Claim 12
Dependent Claim
22 words
An IV fluid line occlusion detector as recited in claim 9 wherein said actuator is positioned for colinear movement with said plunger.
Claim 13
Dependent Claim
19 words
An IV fluid line occlusion detector as recited in claim 10 wherein said measuring means is a strain gauge.
Claim 14
Dependent Claim
34 words
An IV fluid line occlusion detector as recited in claim 11 wherein said beam is positioned with its longitudinal axis substantially perpendicular to the direction of linear movement of said plunger and said actuator.
Claim 15
Dependent Claim
22 words
An IV fluid line occlusion detector as recited in claim 12 wherein said plunger is disposed for reciprocal movement within said chamber.
Claim 16
Dependent Claim
89 words
An occlusion detector, in combination with a fluid line, for use with an IV administration system which comprises: means in operative contact with fluid in said line to pump the fluid therethrough; means for driving said pumping means; means connected between said drive means and said pumping means to measure the force therebetween when fluid is being pumped through said line; and means operatively connected with said measuring means to stop said IV administration system when the force between said actuator and said pumping means reaches a predetermined value.
Claim 17
Dependent Claim
89 words
An occlusion detector, in combination with a fluid line, for use with an IV administration system which comprises: means in operative contact with fluid in said line to pump the fluid therethrough; means for driving said pumping means; means connected between said drive means and said pumping means to measure the force therebetween when fluid is being pumped through said line; and means operatively connected with said measuring means to stop said IV administration system when the force between said actuator and said pumping means reaches a predetermined value.
Claim 18
Dependent Claim
31 words
An occlusion detector as recited in claim 14 further comprising a flexible beam having a first end mounted on said pumping means and a second end mounted on said drive means.
Claim 19
Dependent Claim
17 words
An occlusion detector as recited in claim 15 wherein said measuring means is mounted on said beam.
Claim 20
Dependent Claim
16 words
An occlusion detector as recited in claim 16 wherein said measuring means is a strain gauge.
Claim 21
Dependent Claim
21 words
An occlusion detector as recited in claim 17 wherein said drive means and said pumping means are disposed for colinear movement.
Claim 22
Dependent Claim
22 words
An occlusion detector as recited in claim 17 wherein said pumping means is disposed for reciprocal movement relative to said fluid line.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |