US3886937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Medical administration set for dispensing plural medical liquids
Assignee: Kendall Mcgraw Laboratories Inc
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Filing: 1973-05-07
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Granted: 1975-06-03
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Expires: 1993-05-07
Abstract
Abstract A tubular ''''Y'''' administration set for sequentially delivering a plurality of medical liquids to a patient over prolonged periods of time. A low pressure responsive valve located in a first arm of the ''''Y'''' set, has a movable internal structure that automatically opens and closes the first arm in response to changes in relative surface level heights of two gravity feed liquids supplied to the set''s first and second arms. As these relative surface levels change, the valve''s movable internal structure automatically goes through an open-close-open sequence to cause flow from the arms to the leg in a first-second-first arm sequence.
Inventors
- 👤 Donald E Bobo
- 👤 Charles J Mcphee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:06
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/1407; A61M5/1408; F; F16; F16K; F16K15/00; F16K15/14; F16K15/144; F16K15/147; F16K15/1472; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/2567; Y10T137/2569; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/788; Y10T137/7882; Y10T137/7886
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
255 words
In a system for administering two liquids which includes an administration tube with an upper liquid receiving end, a lower dispensing end, a drip housing between the administration tube ends, a side port below the drip housing, and the system has a secondary tube with an upper liquid receiving end and a lower end connected to the side port of the administration tube, the improvement which comprises: A first non-pressurized liquid container having liquid therein and connected to the upper end of the administration tube; a second non-pressurized liquid container having liquid therein and connected to an upper end of the second tube; a valve in the administration tube between the drip housing and side port, which valve has a movable internal structure that is normally closed when liquid pressure at opposite ends of the valve are equal, but which valve''s internal structure moves to open a passage for liquid flow at a rate of 250 ml/hr with a pressure drop of less than 20 inches of water applied across the valve caused by liquid in the second container dropping below the liquid level in the first container by a distance of less than 20 inches; a puncturable resealable diaphragm closing off the side port; a tubular cannula connected to a lower end of the second tube and extending through the diaphragm; and there is a flow regulator on the administration tube between the side port and lower dispensing end for maintaining a generally constant liquid flow rate from either of the two non-pressurized containers.
Claim 2
Dependent Claim
255 words
In a system for administering two liquids which includes an administration tube with an upper liquid receiving end, a lower dispensing end, a drip housing between the administration tube ends, a side port below the drip housing, and the system has a secondary tube with an upper liquid receiving end and a lower end connected to the side port of the administration tube, the improvement which comprises: A first non-pressurized liquid container having liquid therein and connected to the upper end of the administration tube; a second non-pressurized liquid container having liquid therein and connected to an upper end of the second tube; a valve in the administration tube between the drip housing and side port, which valve has a movable internal structure that is normally closed when liquid pressure at opposite ends of the valve are equal, but which valve''s internal structure moves to open a passage for liquid flow at a rate of 250 ml/hr with a pressure drop of less than 20 inches of water applied across the valve caused by liquid in the second container dropping below the liquid level in the first container by a distance of less than 20 inches; a puncturable resealable diaphragm closing off the side port; a tubular cannula connected to a lower end of the second tube and extending through the diaphragm; and there is a flow regulator on the administration tube between the side port and lower dispensing end for maintaining a generally constant liquid flow rate from either of the two non-pressurized containers.
Claim 3
Dependent Claim
255 words
In a system for administering two liquids which includes an administration tube with an upper liquid receiving end, a lower dispensing end, a drip housing between the administration tube ends, a side port below the drip housing, and the system has a secondary tube with an upper liquid receiving end and a lower end connected to the side port of the administration tube, the improvement which comprises: A first non-pressurized liquid container having liquid therein and connected to the upper end of the administration tube; a second non-pressurized liquid container having liquid therein and connected to an upper end of the second tube; a valve in the administration tube between the drip housing and side port, which valve has a movable internal structure that is normally closed when liquid pressure at opposite ends of the valve are equal, but which valve''s internal structure moves to open a passage for liquid flow at a rate of 250 ml/hr with a pressure drop of less than 20 inches of water applied across the valve caused by liquid in the second container dropping below the liquid level in the first container by a distance of less than 20 inches; a puncturable resealable diaphragm closing off the side port; a tubular cannula connected to a lower end of the second tube and extending through the diaphragm; and there is a flow regulator on the administration tube between the side port and lower dispensing end for maintaining a generally constant liquid flow rate from either of the two non-pressurized containers.
Claim 4
Dependent Claim
255 words
In a system for administering two liquids which includes an administration tube with an upper liquid receiving end, a lower dispensing end, a drip housing between the administration tube ends, a side port below the drip housing, and the system has a secondary tube with an upper liquid receiving end and a lower end connected to the side port of the administration tube, the improvement which comprises: A first non-pressurized liquid container having liquid therein and connected to the upper end of the administration tube; a second non-pressurized liquid container having liquid therein and connected to an upper end of the second tube; a valve in the administration tube between the drip housing and side port, which valve has a movable internal structure that is normally closed when liquid pressure at opposite ends of the valve are equal, but which valve''s internal structure moves to open a passage for liquid flow at a rate of 250 ml/hr with a pressure drop of less than 20 inches of water applied across the valve caused by liquid in the second container dropping below the liquid level in the first container by a distance of less than 20 inches; a puncturable resealable diaphragm closing off the side port; a tubular cannula connected to a lower end of the second tube and extending through the diaphragm; and there is a flow regulator on the administration tube between the side port and lower dispensing end for maintaining a generally constant liquid flow rate from either of the two non-pressurized containers.
Claim 5
Dependent Claim
39 words
The combination according to claim 1, wherein the valve includes an expandable member with two resilient reed portions that converge toward each other in a direction from the liquid receiving end to the side port of the administration tube.
Claim 6
Dependent Claim
40 words
The combination according to claim 1, wherein the valve has a valve seat; a rigid post in close proximity to the valve seat; and a resilient disc engaging the rigid post and urged by the post against the valve seat.
References Cited (Backward Citations)
US2129983A
Cited
US2989052A
Cited
US2962193A
Cited
US2999499A
Cited
US3177870A
Cited
US3217711A
Cited
US3332418A
Cited
US3463159A
Cited
US3595467A
Cited
US3568977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |