Patent US4672382A successfully refreshed from Google Patents.
Patent US3877428A successfully refreshed from Google Patents.
US3877428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable infusion control device
Assignee: Sorenson Research Co Inc
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Filing: 1973-04-30
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Granted: 1975-04-15
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Expires: 1993-04-30
Abstract
Abstract A novel infusion control device for selectively controlling the rate of administration of fluids parenterally to a patient. The control device provides attachment fittings which allow it to be placed at any point along a supply tube between a reservoir and the patient. A rotatable metering plate defines a capillary flow path between the input and output ports of the control device. The metering plate is axially rotatable with respect to the input and output ports to vary the effective length of the flow path so as to regulate the flow rate essentially uniformly between full flow and zero flow conditions.
Inventors
- 👤 Charles E Seagle
- 👤 Gordon S Reynolds
- 👤 Jr Karl A Pannier
- 👤 James L Sorenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:25
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/168; A61M5/16877
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
133 words
A variable infusion device for administering liquids parenterally to a patient comprising: a fluid receiving means; a fluid delivering means nonrotatably joined to the fluid receiving means; and metering means interposed between the fluid receiving means and the fluid delivering means and comprising a single metering plate the periphery of which is exposed and hand rotatable about an axis, a capillary formed in at least one face of the metering plate, the capillary comprising: at least two grooves of uniform cross-sectional area; each groove being formed along an arc of constant radius, the arc traversing less than 360* about the axis; and means providing fluid communication between the grooves; rotation of the metering plates altering the effective length of the capillary by a distance greater than the arcuate displacement of the metering plate.
Claim 2
Dependent Claim
133 words
A variable infusion device for administering liquids parenterally to a patient comprising: a fluid receiving means; a fluid delivering means nonrotatably joined to the fluid receiving means; and metering means interposed between the fluid receiving means and the fluid delivering means and comprising a single metering plate the periphery of which is exposed and hand rotatable about an axis, a capillary formed in at least one face of the metering plate, the capillary comprising: at least two grooves of uniform cross-sectional area; each groove being formed along an arc of constant radius, the arc traversing less than 360* about the axis; and means providing fluid communication between the grooves; rotation of the metering plates altering the effective length of the capillary by a distance greater than the arcuate displacement of the metering plate.
Claim 3
Dependent Claim
147 words
A varaible infusion device for administering fluids parenterally to a patient comprising: a fluid receiving means; a fluid delivering means nonrotatably joined to the fluid receiving means; at least first and second capillaries formed as coplanar grooves, such having a uniform cross-sectional area and lying in a plane transverse to the axis of the fluid receving means and the fluid delivering means, the first capillary having a first constant radius about an axis and defining an arc, the first capillary being in fluid communication with the fluid receiving means, the second capillary having a second constant radius about the axis and defining an arc, the second capillary being in fluid Communication with the fluid delivering means; and a fluid metering means comprising a channel transversely bridging the first and second capillaries to provide fluid communication therebetween, the channel being arcuately displaceable along the arc of the capillaries.
Claim 4
Dependent Claim
147 words
A varaible infusion device for administering fluids parenterally to a patient comprising: a fluid receiving means; a fluid delivering means nonrotatably joined to the fluid receiving means; at least first and second capillaries formed as coplanar grooves, such having a uniform cross-sectional area and lying in a plane transverse to the axis of the fluid receving means and the fluid delivering means, the first capillary having a first constant radius about an axis and defining an arc, the first capillary being in fluid communication with the fluid receiving means, the second capillary having a second constant radius about the axis and defining an arc, the second capillary being in fluid Communication with the fluid delivering means; and a fluid metering means comprising a channel transversely bridging the first and second capillaries to provide fluid communication therebetween, the channel being arcuately displaceable along the arc of the capillaries.
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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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |