Patent US2381351A successfully refreshed from Google Patents.
Patent US4637817A successfully refreshed from Google Patents.
US4637817A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sequence valve for piggyback IV administration with occlusion failure sensing
Assignee: Graseby Medical Ltd
•
Filing: 1985-11-14
•
Granted: 1987-01-20
•
Expires: 2005-11-14
Abstract
Abstract A piggyback IV administration system uses a solenoid actuated sequence valve to control the flow of fluid from a pair of IV fluid sources to the inlet of an IV pump or controller. The sequence valve pinches off a first tube while allowing fluid to flow through the second tube and then, in response to a control signal, changes state so that the second tube is pinched off and fluid can flow through the first tube unimpeded. The sequence valve automatically senses conditions which indicate a failure of the sequence valve to occlude the second tube when the valve changes state.
Inventors
- 👤 G. Kent Archibald
- 👤 Frank A. Slaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:04
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/168; A61M5/16804; A61M5/16827; F; F16; F16K; F16K7/00; F16K7/02; F16K7/04; F16K7/06; Y; Y10; Y10S; Y10S128/00; Y10S128/13; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8225; Y10T137/8593; Y10T137/87153; Y10T137/87161
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
153 words
A sequence valve for selectively occluding first and second flexible tubes in sequence, the sequence valve comprising: a base; a crank pivotally connected to the base for movement between first and second crank positions; bias means for providing a bias force to the crank which urges the crank toward the second crank position; occluder means connected to the crank for occluding the first flexible tube when the crank is in the first crank position, and for occluding the second flexible tube when the crank is in the second crank position; releasable latch means for latching the crank in the first crank position and for releasing the crank in response to a control signal to allow the bias force to pivot the crank to the second crank position; and means for sensing a condition indicative of failure of the sequence valve to occlude the second flexible tube and providing a signal in response thereto.
Claim 2
Dependent Claim
153 words
A sequence valve for selectively occluding first and second flexible tubes in sequence, the sequence valve comprising: a base; a crank pivotally connected to the base for movement between first and second crank positions; bias means for providing a bias force to the crank which urges the crank toward the second crank position; occluder means connected to the crank for occluding the first flexible tube when the crank is in the first crank position, and for occluding the second flexible tube when the crank is in the second crank position; releasable latch means for latching the crank in the first crank position and for releasing the crank in response to a control signal to allow the bias force to pivot the crank to the second crank position; and means for sensing a condition indicative of failure of the sequence valve to occlude the second flexible tube and providing a signal in response thereto.
Claim 3
Dependent Claim
57 words
The sequence valve of claim 1 wherein the means for sensing a condition comprises: contact means for contacting a first switch element when the crank is in the first crank position and for contacting a second switch element when the crank is in the second crank position to provide signals representative of the position of the crank.
Claim 4
Dependent Claim
43 words
The sequence valve of claim 2 wherein the means for sensing a condition further comprises: means for measuring a time from when the contact means breaks contact with the first switch element until the contact means makes contact with the second switch element.
Claim 5
Dependent Claim
25 words
The sequence valve of claim 3 and further comprising: means for providing an alarm signal if the time measured is greater than a predetermined value.
Claim 6
Dependent Claim
62 words
The sequence valve of claim 2 wherein the crank is movable to third position past the second crank position if the occluder means does not engage the second flexible tube, and wherein the means for sensing a condition further comprises: means for causing the contact means and the second switch element to break electrical contact if the crank moves to third position.
Claim 7
Dependent Claim
78 words
The sequence valve of claim 5 wherein the second switch element comprises a contact wire having a fixed end and a free end, and a terminal normally in contact with the free end; and wherein the means for causing the contact means and the second switch element to break electrical contact engages and deflects the contact wire when the crank moves to the third position to cause the free end to move out of contact with the terminal.
Claim 8
Dependent Claim
46 words
The sequence valve of claim 1 wherein the means for sensing a condition comprises: means for sensing when the crank has moved to a third position which can only be reached if the second flexible tube is not in position to be occluded by the occluder.
Claim 9
Dependent Claim
33 words
The sequence valve of claim 1 wherein the means for sensing a condition comprises: means for sensing rate of movement of the crank from the first crank position toward the second crank position.
Claim 10
Dependent Claim
21 words
The sequence valve of claim 1 and further comprising: channel means for positioning the first and second tubes in side-by-side relationship.
Claim 11
Dependent Claim
73 words
The sequence valve of claim 9 wherein the occluder means comprises an occluder stud connected to the crank and extending into the channel means between the first and second tubes so that when the crank is in the first crank position the occluder stud causes the first tube to be pinched off and when the crank is in the second crank position the occluder stud causes the second tube to be pinched off.
Claim 12
Dependent Claim
30 words
The sequence valve of claim 10 and further comprising: a first leaf spring on one side of the channel means for urging one of the tubes toward the occluder stud.
Claim 13
Dependent Claim
32 words
The sequence valve of claim 11 and further comprising: a second leaf spring on an opposite side of the channel means for urging the other of the tubes toward the occluder stud.
Claim 14
Dependent Claim
125 words
A sequence valve for selectively occluding first and second flexible tubes in sequence, the sequence valve comprising: spring biased pivotable tube pincher means for pinching off the first and then the second flexible tube; pivotable latch means for holding the tube pincher in a position in which the first tube is pinched off; a solenoid means which releases the latch in response to a control signal to permit the latch to pivot out of engagement with the tube pincher and thereby allow the tube pincher to pivot to a position in which the second tube is pinched off; and means for sensing a condition indicative of a failure of the tube pincher to pinch off the second tube and providing a signal in response thereto.
Claim 15
Dependent Claim
125 words
A sequence valve for selectively occluding first and second flexible tubes in sequence, the sequence valve comprising: spring biased pivotable tube pincher means for pinching off the first and then the second flexible tube; pivotable latch means for holding the tube pincher in a position in which the first tube is pinched off; a solenoid means which releases the latch in response to a control signal to permit the latch to pivot out of engagement with the tube pincher and thereby allow the tube pincher to pivot to a position in which the second tube is pinched off; and means for sensing a condition indicative of a failure of the tube pincher to pinch off the second tube and providing a signal in response thereto.
Claim 16
Dependent Claim
48 words
The sequence valve of claim 13 wherein the means for sensing a condition comprises: means for sensing when the tube pincher has moved to a position which can only be reached if the second flexible tube is not in position to be pinched off by the tube pincher.
Claim 17
Dependent Claim
46 words
The sequence valve of claim 13 wherein the means for sensing a condition comprises: means for sensing rate of movement of the tube pincher from the position in which the first tube is pinched off toward the position in which the second tube in pinched off.
Claim 18
Dependent Claim
150 words
An IV administration system comprising: a first source of a first IV fluid; a second source of a second IV fluid; an IV control device having an inlet and an outlet for delivering IV fluids; a first flexible tube connected between the first source and the inlet; a second flexible tube connected between the second source and the inlet; a sequence valve for switching, in response to a control signal, from a first state in which the first flexible tube is occluded and the second flexible tube is not to a second state in which the second flexible tube is occluded and the first flexible tube is not; means for providing the control signal to the sequence valve; and means for sensing a condition indicative of failure of the sequence valve to occlude the second flexible tube in response to the control signal and providing a signal in response thereto.
Claim 19
Dependent Claim
150 words
An IV administration system comprising: a first source of a first IV fluid; a second source of a second IV fluid; an IV control device having an inlet and an outlet for delivering IV fluids; a first flexible tube connected between the first source and the inlet; a second flexible tube connected between the second source and the inlet; a sequence valve for switching, in response to a control signal, from a first state in which the first flexible tube is occluded and the second flexible tube is not to a second state in which the second flexible tube is occluded and the first flexible tube is not; means for providing the control signal to the sequence valve; and means for sensing a condition indicative of failure of the sequence valve to occlude the second flexible tube in response to the control signal and providing a signal in response thereto.
Claim 20
Dependent Claim
121 words
The system of claim 16 wherein the sequence valve comprises: a base; a crank pivotally connected to the base for movement between first and second crank positions; bias means for providing a bias force to the crank which urges the crank toward the second crank position; occluder means connected to the crank for occluding the first flexible tube when the crank is in the first crank position, and for occluding the second flexible tube when the crank is in the second crank position; and releasable latch means for latching the crank in the first crank position and for releasing the crank in response to a control signal to allow the bias force to pivot the crank to the second crank position.
Claim 21
Dependent Claim
46 words
The system valve of claim 17 wherein the means for sensing a condition comprises: means for sensing when the crank has moved to a position which can only be reached if the second flexible tube is not in position to be occluded by the occluder means.
Claim 22
Dependent Claim
51 words
The system of claim 17 wherein the means for sensing a condition comprises: means for sensing rate of movement of the crank from the position in which the first tube is pinched off toward the position in which the second tube is pinched off and providing a signal in response thereto.
Claim 23
Dependent Claim
90 words
The system of claim 16 wherein the sequence valve comprises: a spring biased pivotable tube pincher for pinching off the first and then the second tube; a pivotable latch for holding the tube pincher in a position in which the first tube is pinched off; and a solenoid which releases the latch in response to a control signal to permit the latch to pivot out of engagement with the tube pincher and thereby allow the tube pincher to pivot to a position in which the second tube is pinched off.
Claim 24
Dependent Claim
46 words
The system of claim 20 wherein the means for sensing a condition comprises: means for sensing when the tube pincher has moved to a position which can only be reached if the second flexible tube is not in position to be occluded by the occluder means.
Claim 25
Dependent Claim
52 words
The system of claim 20 wherein the means for sensing a condition comprises: means for sensing rate of movement of the tube pincher from the position in which the first pincher is pinched off toward the position in which the second tube is pinched off and providing a signal in response thereto.
Claim 26
Dependent Claim
123 words
An IV administration system comprising: a first source of a first IV fluid; a second source of a second IV fluid; an IV control device having an inlet and an outlet for delivering IV fluids; a first flexible tube connected between the first source and the inlet; a second flexible tube connected between the second source and the inlet; a sequence valve for initially occluding the first flexible tube and then occluding the second flexible tube in response to a control signal; means for providing the control signal to the sequence valve; and means for sensing a condition indicative of failure of the sequence valve to occlude the second tube in response to the control signal and providing a signal in response thereto.
Claim 27
Dependent Claim
123 words
An IV administration system comprising: a first source of a first IV fluid; a second source of a second IV fluid; an IV control device having an inlet and an outlet for delivering IV fluids; a first flexible tube connected between the first source and the inlet; a second flexible tube connected between the second source and the inlet; a sequence valve for initially occluding the first flexible tube and then occluding the second flexible tube in response to a control signal; means for providing the control signal to the sequence valve; and means for sensing a condition indicative of failure of the sequence valve to occlude the second tube in response to the control signal and providing a signal in response thereto.
Claim 28
Dependent Claim
22 words
The system of claim 23 wherein the sequence valve includes a movable occluder which is actuated in response to the control signal.
Claim 29
Dependent Claim
27 words
The system of claim 24 wherein the means for sensing a condition senses a rate of movement of the occluder and providing a signal in response thereto.
Claim 30
Dependent Claim
35 words
The system of claim 24 wherein the means for sensing a condition senses movement of the occluder to a position which is only possible if the second tube is not in position to be occluded.
Claim 31
Dependent Claim
22 words
The system of claim 23 wherein the means for sensing a condition senses absence of the second tube from the sequence valve.
References Cited (Backward Citations)
FR1130107A
Cited
US3601124A
Cited
US3895649A
Cited
US4094318A
Cited
US4114617A
Cited
US4230151A
Cited
US4316460A
Cited
US4324238A
Cited
US4236880A
Cited
US4265240A
Cited
US4425116A
Cited
US4460358A
Cited
US4391598A
Cited
US4430074A
Cited
US4397642A
Cited
US4451255A
Cited
US4512764A
Cited
US4484599A
Cited
US4533347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-19 | 1990-07-21 | 1991-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-19 | 1994-07-21 | 1995-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-19 | 1998-07-21 | 1999-01-20 | $7700.00 | Window Closed / Lapsed |