US4722732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intravenous fluid supply system
Assignee: Individual
•
Filing: 1986-10-20
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Granted: 1988-02-02
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Expires: 2006-10-20
Abstract
Abstract An intravenous fluid system incorporates an elastomeric reservoir in which the intravenous fluid is retained under pressure and fed at a controlled rate to a cannula which is inserted into the patient. The reservoir is contained in a translucent housing which is open to the atmosphere through a check valve and which is connected to the line connecting the reservoir to the cannula through another check valve which permits flow of fluid into the housing when the outlet of the cannula is plugged.
Inventors
- 👤 James Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:57
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/142; A61M5/145; A61M5/148; A61M5/152; A61M5/168; A61M5/16831
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
134 words
Apparatus for supplying an intravenous fluid to a patient, comprising in combination an elastomeric reservoir containing a quantity of intravenous fluid under pressure, an outlet port from said reservoir, cannula means for insertion into a vein or artery of said patient, a first conduit connected between said cannula and said outlet port for carrying said fluid to said cannula, metering valve means disposed between said port and said cannula for adjustably controlling the rate of flow of said fluid from said reservoir to said cannula, a housing, an air inlet port in said housing, a fluid return inlet port in said housing, a second conduit connected between said first conduit and said return inlet port, and first check valve means in said second conduit for preventing the flow of fluid therethrough toward said cannula.
Claim 2
Dependent Claim
134 words
Apparatus for supplying an intravenous fluid to a patient, comprising in combination an elastomeric reservoir containing a quantity of intravenous fluid under pressure, an outlet port from said reservoir, cannula means for insertion into a vein or artery of said patient, a first conduit connected between said cannula and said outlet port for carrying said fluid to said cannula, metering valve means disposed between said port and said cannula for adjustably controlling the rate of flow of said fluid from said reservoir to said cannula, a housing, an air inlet port in said housing, a fluid return inlet port in said housing, a second conduit connected between said first conduit and said return inlet port, and first check valve means in said second conduit for preventing the flow of fluid therethrough toward said cannula.
Claim 3
Dependent Claim
6 words
Apparatus according to claim 1 comprising
Claim 4
Dependent Claim
27 words
drip chamber means connected between said outlet port and said cannular for providing a visual indication of the rate of flow of said fluid to the patient.
Claim 5
Dependent Claim
27 words
drip chamber means connected between said outlet port and said cannular for providing a visual indication of the rate of flow of said fluid to the patient.
Claim 6
Dependent Claim
62 words
Apparatus according to claim 2 wherein said drip chamber comprises a rigid transparent casing enclosing a drip chamber, a drip tube means opening into the top of said chamber, a self sealing injection port in said casing for receiving a hollow needle through which air may be injected into said chamber, and a fluid outlet port at the bottom of said casing.
Claim 7
Dependent Claim
46 words
Apparatus according to claim 2 comprising a rigid housing enclosing said reservoir, flexible tube means connecting said outlet port to said drip chamber means, said flexible tube means being sufficiently long to permit said drip chamber means to be positioned against the side of said housing.
Claim 8
Dependent Claim
23 words
Apparatus according to claim 2 comprising means exclusive of the intravenous fluid path through said drip chamber for injecting air into said chamber.
Claim 9
Dependent Claim
133 words
Apparatus for supplying an intravenous fluid to a patient, comprising in combination an elastomeric reservoir containing a quantity of intravenous fluid under pressure, an outlet port from said reservoir, metering valve means disposed over said port for adjustably controlling the rate of flow of said fluid from said reservoir, cannula means for insertion into a vein or artery of said patient, a first conduit connected between said cannula and said metering valve means for carrying said fluid to said cannula, an impervious housing enclosing said reservoir, an air inlet port in said housing, a fluid return inlet port in said housing, a second conduit connected between said first conduit and said return inlet port, and first check valve means in said second conduit for preventing the flow of fluid therethrough toward said cannula.
Claim 10
Dependent Claim
133 words
Apparatus for supplying an intravenous fluid to a patient, comprising in combination an elastomeric reservoir containing a quantity of intravenous fluid under pressure, an outlet port from said reservoir, metering valve means disposed over said port for adjustably controlling the rate of flow of said fluid from said reservoir, cannula means for insertion into a vein or artery of said patient, a first conduit connected between said cannula and said metering valve means for carrying said fluid to said cannula, an impervious housing enclosing said reservoir, an air inlet port in said housing, a fluid return inlet port in said housing, a second conduit connected between said first conduit and said return inlet port, and first check valve means in said second conduit for preventing the flow of fluid therethrough toward said cannula.
Claim 11
Dependent Claim
31 words
Apparatus according to claim 6, comprising second check valve means connected over said air inlet port for preventing the flow of fluid out of said housing through said air inlet port.
Claim 12
Dependent Claim
22 words
Apparatus according to claim 8, wherein said air inlet port is located at a substantial distance above said fluid return inlet port.
Claim 13
Dependent Claim
25 words
Apparatus according to claim 8 wherein said housing includes a translucent portion through which the level of return fluid in said housing can be observed.
Claim 14
Dependent Claim
29 words
Apparatus according to claim 8 comprising means disposed between said first check valve means and said housing for providing a visible indication of fluid flow in said second conduit.
Claim 15
Dependent Claim
35 words
Apparatus according to claim 6 comprising a tubular member mounted in said first conduit means, said tubular member having a branch conduit therein, and said first check valve means being mounted in said branch conduit.
Claim 16
Dependent Claim
38 words
Apparatus according to claim 12 wherein said first conduit means comprises a first flexible tube connected between said metering valve means and said tubular member, and a second flexible tube connected between said tubular member and said cannula.
Claim 17
Dependent Claim
26 words
Apparatus according to claim 12 wherein said second conduit means comprises a third flexible tube connected between said tubular member and said fluid return inlet port.
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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) | 1991-02-01 | 1991-08-03 | 1992-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-01 | 1995-08-03 | 1996-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-01 | 1999-08-03 | 2000-02-02 | $7700.00 | Window Closed / Lapsed |