US3756243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow control system for physiological drainage
Assignee: Baxter International Inc
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Filing: 1971-09-23
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Granted: 1973-09-04
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Expires: 1991-09-23
Abstract
Abstract A flow control system for the positive control of drainage of fluid from a region of the body to be drained to a drainage site at another location. It provides means for the controlled positive shut-off of said drainage. The system includes a flow valve having an internal flow cavity with an inlet and an outlet. A partition divides the cavity into a pair of chambers, the inlet and outlet opening into different respective ones of the chambers. A port is formed in the partition, and a fluid actuated valving member is adapted to open and to close the port. A reservoir has a plenum chamber defined by a bounding wall portion which is movable to change the volume of the plenum chamber. A manually actuable control valve which has an open condition and a closed condition interconnects the plenum chamber of the reservoir to motive means for moving the valving member for opening and closing the flow valve.
Inventors
- 👤 R Schulte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:21
CPC Classifications
A; A61; A61M; A61M27/00; A61M27/002; A61M27/006
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
207 words
A flow control system for the positive control of drainage of fluid from a region of the body to be drained to another location, and providing for the controlled positive shut-off of said drainage, said system comprising: a flow valve having an internal flow cavity, an inlet to and an outlet from said flow cavity, a partition dividing the cavity into a pair of chambers, the inlet and outlet opening into different respective ones of said chambers, said partition having a port therein which interconnects the two chambers, a fluid-actuated valving member in one of said chambers comprising a closure element movable against and away from the partition so as to close or to open the port to flow therethrough, and motive chamber means having a movable wall carrying said closure element; a reservoir having a plenum chamber defined by a bounding wall, a portion of which is movable in order to reduce the volume of the plenum chamber; and a manually-actuable control valve having an open condition and a closed condition, interconnecting the plenum chamber of the reservoir and the motive chamber means of said valving member and being adapted to prevent flow between them in at least one direction therethrough while in its closed condition.
Claim 2
Dependent Claim
207 words
A flow control system for the positive control of drainage of fluid from a region of the body to be drained to another location, and providing for the controlled positive shut-off of said drainage, said system comprising: a flow valve having an internal flow cavity, an inlet to and an outlet from said flow cavity, a partition dividing the cavity into a pair of chambers, the inlet and outlet opening into different respective ones of said chambers, said partition having a port therein which interconnects the two chambers, a fluid-actuated valving member in one of said chambers comprising a closure element movable against and away from the partition so as to close or to open the port to flow therethrough, and motive chamber means having a movable wall carrying said closure element; a reservoir having a plenum chamber defined by a bounding wall, a portion of which is movable in order to reduce the volume of the plenum chamber; and a manually-actuable control valve having an open condition and a closed condition, interconnecting the plenum chamber of the reservoir and the motive chamber means of said valving member and being adapted to prevent flow between them in at least one direction therethrough while in its closed condition.
Claim 3
Dependent Claim
49 words
A system according to claim 1 in which the motive chamber means comprises a motive chamber bounded at least in part by the movable wall which is movable as a consequence of fluid pressure within the motive chamber so as to cause the closure means to close the port.
Claim 4
Dependent Claim
29 words
A system according to claim 2 in which the said wall of the motive chamber means is elastic so as to stretch while being moved to close the port.
Claim 5
Dependent Claim
22 words
A system according to claim 2 in which the closure means comprises a region of said wall of the motive chamber means.
Claim 6
Dependent Claim
76 words
A system according to claim 1 iN which a flexible diaphragm extends across the flow valve which is connected to the outlet and is adapted to move against the port to close the same when the fluid pressure in the outlet is greater than that in the inlet and to move away from the port to leave it open when the differential pressure is reversed, the diaphragm being disposed between the closure elements and the port.
Claim 7
Dependent Claim
49 words
A system according to claim 5 in which the motive chamber means comprises a motive chamber bounded at least in part by the movable wall which is movable as a consequence of fluid pressure within the motive chamber so as to cause the closure means to close the port.
Claim 8
Dependent Claim
29 words
A system according to claim 6 in which the said wall of the motive chamber means is elastic so as to stretch while being moved to close the port.
Claim 9
Dependent Claim
37 words
A system according to claim 1 in which the control valve comprises a check valve which opens to permit flow from the reservoir to the motive chamber means, and which closes to prevent it unless manually manipulated.
Claim 10
Dependent Claim
38 words
A system according to claim 1 in which the control valve comprises a wall having a slit therethrough which is closed when the wall is undistorted, and which is opened to flow when the said wall is distorted.
Claim 11
Dependent Claim
74 words
A system according to claim 1 in which the control valve comprises a body forming a cavity, a dome-shaped manually deformable valve element in said cavity having slits through its wall which are closed when the valve element is undistorted and open when the valve element is distorted, the inside of said dome being connected to the reservoir, and the cavity at the outside of the dome being connected to the motive chamber means.
Claim 12
Dependent Claim
31 words
A system according to claim 9 in which the body of the control valve has an upper and a lower peripheral zone, the slits extending between but not into said zones.
Claim 13
Dependent Claim
49 words
A system according to claim 9 in which the motive chamber means comprises a motive chamber bounded at least in part by the movable wall which is movable as a consequence of fluid pressure within the motive chamber so as to cause the closure means to close the port.
Claim 14
Dependent Claim
29 words
A system according to claim 12 in which the said wall of the motive chamber means is elastic so as to stretch while being moved to close the port.
Claim 15
Dependent Claim
22 words
A system according to claim 12 in which the closure means comprises a region of said wall of the motive chamber means.
Claim 16
Dependent Claim
77 words
A system according to claim 9 in which a flexible diaphragm extends across the flow valve chamber which is connected to the outlet and is adapted to move against the port to close the same when the fluid pressure in the outlet is greater than that in the inlet and to move away from the port to leave it open when the differential pressure is reversed, the diaphragm being disposed between the closure elements and the port.
Claim 17
Dependent Claim
49 words
A system according to claim 15 in which the motive chamber means comprises a motive chamber bounded at least in part by the movable wall which is movable as a consequence of fluid pressure within the motive chamber so as to cause the closure means to close the port.
Claim 18
Dependent Claim
29 words
A system according to claim 16 in which the said wall of the motive chamber means is elastic so as to stretch while being moved to close the port.
Claim 19
Dependent Claim
37 words
A system according to claim 9 in which the control valve comprises a check valve which opens to permit flow from the reservoir to the motive chamber means, and which closes to prevent it unless manually manipulated.
Claim 20
Dependent Claim
50 words
A system according to claim 8 in which the motive chamber means comprises a sink in the flow valve on the same side of the partition as the outlet, and a flexible and elastic sheet laid across said sink to form a motive chamber connected to the manually-actuable control valve.
Claim 21
Dependent Claim
148 words
In combination, a flow valve for the positive control of drainage of fluid from a region of the body to be drained to another location which flow valve provides for the controlled positive shut-off of said drainage, comprising a body having an internal flow cavity, an inleT to and an outlet from said flow cavity, a partition dividing the cavity into a pair of chambers, the inlet and outlet opening into different respective ones of said chambers, said partition having a port therein which interconnects the two chambers, a fluid-actuated valving member in one of said chambers comprising a closure element movable against and away from the partition so as to close or to open the port to flow therethrough, and motive chamber means having a movable wall portion carrying said closure element; and means for forcing liquid into said motive chamber means and releasably retaining it therein.
Claim 22
Dependent Claim
148 words
In combination, a flow valve for the positive control of drainage of fluid from a region of the body to be drained to another location which flow valve provides for the controlled positive shut-off of said drainage, comprising a body having an internal flow cavity, an inleT to and an outlet from said flow cavity, a partition dividing the cavity into a pair of chambers, the inlet and outlet opening into different respective ones of said chambers, said partition having a port therein which interconnects the two chambers, a fluid-actuated valving member in one of said chambers comprising a closure element movable against and away from the partition so as to close or to open the port to flow therethrough, and motive chamber means having a movable wall portion carrying said closure element; and means for forcing liquid into said motive chamber means and releasably retaining it therein.
Claim 23
Dependent Claim
49 words
A system according to claim 20 in which the motive chamber means comprises a motive chamber bounded at least in part by the movable wall which is movable as a consequence of fluid pressure within the motive chamber so as to cause the closure means to close the port.
Claim 24
Dependent Claim
29 words
A combination according to claim 21 in which the said wall of the motive chamber means is elastic so as to stretch while being moved to close the port.
Claim 25
Dependent Claim
22 words
A combination according to claim 21 in which the closure means comprises a region of said wall of the motive chamber means.
Claim 26
Dependent Claim
77 words
A combination according to claim 20 in which a flexible diaphragm extends across the flow valve chamber which is connected to the outlet and is adapted to move against the port to close the same when the fluid pressure in the outlet is greater than that in the inlet and to move away from the port to leave it open when the differential pressure is reversed, the diaphragm being disposed between the closure elements and the port.
Claim 27
Dependent Claim
49 words
A system according to claim 24 in which the motive chamber means comprises a motive chamber bounded at least in part by the movable wall which is movable as a consequence of fluid pressure within the motive chamber so as to cause the closure means to close the port.
Claim 28
Dependent Claim
29 words
A combination according to claim 25 in which the said wall of the motive chamber means is elastic so as to stretch while being moved to close the port.
Claim 29
Dependent Claim
50 words
A system according to claim 20 in which the motive chamber means comprises a sink in the flow valve on the same side of the partition as the outlet, and a flexible and elastic sheet laid across said sink to form a motive chamber connected to the manually-actuable control valve.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |