US4968301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable infusion device
Assignee: CareFusion 303 Inc
•
Filing: 1989-02-02
•
Granted: 1990-11-06
•
Expires: 2009-02-02
Abstract
Abstract A disposable IV infusion device for ambulatory patients comprises a disk-shaped cover plate and a disk-shaped impeller plate which are interconnected by a stretched membrane that joins the edge of the cover plate with the edge of the impeller plate. The effect of the membrane is to urge the plates into juxtaposition. A fluid port is formed on the cover plate for fluid communication through the port with a collapsible fluid chamber established between the plates. Fluid, when injected into the chamber between the plates, is subsequently expelled through the port for controlled infusion to a patient as the membrane pulls the plates toward each other to collapse the chamber.
Inventors
- 👤 Giorgio di Palma
- 👤 Victor L. Bartholomew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:09
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/142; A61M5/145; A61M5/148; A61M5/152; A61M5/14244; Y; Y10; Y10S; Y10S128/00; Y10S128/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
142 words
A portable device for infusing fluids to a patient which comprises: a first rigid plate having a fluid port, said first plate being circumscribed by an edge; a second rigid plate circumscribed by an edge; a stretched elastic membrane interconnecting and surrounding said respective edges for urging said first and second plates from a first configuration, in which said plates are separated to establish a fluid chamber therebetween, into a second configuration, wherein said plates are juxtaposed, to expel fluid from said chamber through said port to said patient, said membrane being disposed to urge said first and second plates between said first and second configurations with a substantially constant force; an IV line connected in fluid communication with said port; and a roller clamp associated with said IV line to control the flow of fluid from said chamber through said line.
Claim 2
Dependent Claim
142 words
A portable device for infusing fluids to a patient which comprises: a first rigid plate having a fluid port, said first plate being circumscribed by an edge; a second rigid plate circumscribed by an edge; a stretched elastic membrane interconnecting and surrounding said respective edges for urging said first and second plates from a first configuration, in which said plates are separated to establish a fluid chamber therebetween, into a second configuration, wherein said plates are juxtaposed, to expel fluid from said chamber through said port to said patient, said membrane being disposed to urge said first and second plates between said first and second configurations with a substantially constant force; an IV line connected in fluid communication with said port; and a roller clamp associated with said IV line to control the flow of fluid from said chamber through said line.
Claim 3
Dependent Claim
23 words
A portable device for infusing fluids to a patient as recited in claim 1 wherein said membrane is made of an elastomeric material.
Claim 4
Dependent Claim
170 words
An ambulatory IV fluid infusion pump for infusing fluid to a patient which comprises: a cover plate bounded by an edge and formed with a fluid port; an impeller plate bounded by an edge; a stretched elastic membrane connecting said edge of said cover plate to said edge of said impeller plate for pulling said impeller plate toward said cover plate to expel fluid held therebetween by said membrane through said port to said patient, said membrane being surroundingly disposed around the respective said edges to pull said impeller plate toward said cover plate with a substantially constant force; a liner having a periphery, said liner being disposed between said cover plate and said impeller plate, and said periphery of said liner being attached to said cover plate to establish a fluid chamber between said liner and said cover plate, and an IV line connected in fluid communication with said port, and means associated with said IV line to control the flow of fluid from said chamber through said line.
Claim 5
Dependent Claim
170 words
An ambulatory IV fluid infusion pump for infusing fluid to a patient which comprises: a cover plate bounded by an edge and formed with a fluid port; an impeller plate bounded by an edge; a stretched elastic membrane connecting said edge of said cover plate to said edge of said impeller plate for pulling said impeller plate toward said cover plate to expel fluid held therebetween by said membrane through said port to said patient, said membrane being surroundingly disposed around the respective said edges to pull said impeller plate toward said cover plate with a substantially constant force; a liner having a periphery, said liner being disposed between said cover plate and said impeller plate, and said periphery of said liner being attached to said cover plate to establish a fluid chamber between said liner and said cover plate, and an IV line connected in fluid communication with said port, and means associated with said IV line to control the flow of fluid from said chamber through said line.
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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) | 1993-11-05 | 1994-05-07 | 1994-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-05 | 1998-05-07 | 1998-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-05 | 2002-05-07 | 2002-11-06 | $7700.00 | Window Closed / Lapsed |