Patent US3895741A successfully refreshed from Google Patents.
US3895741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intravenous fluids administration apparatus
Assignee: SPARTAMED Inc A CORP OF UT
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Filing: 1972-09-27
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Granted: 1975-07-22
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Expires: 1992-09-27
Abstract
Abstract Apparatus for parenteral fluid administration to a patient wherein a pliant bag containing the liquid to be administered is supported between two pressure pads having mutually-confronting, spaced-apart, pressure-applying faces. A side edge and the bottom edge of one of the pads is offset from the corresponding side and bottom edge of the other pad. As one pressure pad approaches the other, pressure is applied to the pliant bag and the liquid is forced therefrom through a bottom outlet disposed below the pressure plates. When the pliant bag is fully squeezed and its side-walls are in contact, portions of the pliant bag adjacent the offset bottom edges and the offset side edges of the pressure plates form a lateral duct at the bottom of the bag for the remaining liquid and a riser duct which is in communication with the lateral duct and extends for the full height of the bag interior. Any gases present in the pliant bag rise to the top of the riser duct while the liquid remains at the bottom of the bag in the lateral duct. Thus no gas is ever administered to the patient.
Inventors
- 👤 Bede Stanislaus Nugent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:20
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/142; A61M5/145; A61M5/148; A61M5/1483
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
218 words
Apparatus for parenteral fluid administration to a patient comprising: a. two pressure pads having mutually confronting spaced apart pressure applying faces, a side edge and bottom edge of one face being offset from the corresponding side edge and bottom edge of the other face; b. a pliant bag having a bottom outlet, a gaseous content and a liquid content; c. means to support said pliant bag sandwiched between said faces so that its liquid content may drain through said outlet, the outlet extending beneath one of said pads; d. loading means operable to cause one of said pressure pads to approach the face of said other pressure pad; e. said faces being so sized that when, by said approach, they bring opposed side-walls of said pliant bag therebetween into contact thereby to halt further said approach of said faces, portions of said side-walls remain bulged apart suffIciently for the squeezed bag still to contain said gaseous content thereby to avoid its reaching the patient; and said pressureapplying faces being formed that the said bulged apart sidewall portions form a lateral duct in and at the bottom of the bag to which said outlet opens, and also forms at least one riser duct which opens to said lateral duct and extends for the full height of the bag interior.
Claim 2
Dependent Claim
218 words
Apparatus for parenteral fluid administration to a patient comprising: a. two pressure pads having mutually confronting spaced apart pressure applying faces, a side edge and bottom edge of one face being offset from the corresponding side edge and bottom edge of the other face; b. a pliant bag having a bottom outlet, a gaseous content and a liquid content; c. means to support said pliant bag sandwiched between said faces so that its liquid content may drain through said outlet, the outlet extending beneath one of said pads; d. loading means operable to cause one of said pressure pads to approach the face of said other pressure pad; e. said faces being so sized that when, by said approach, they bring opposed side-walls of said pliant bag therebetween into contact thereby to halt further said approach of said faces, portions of said side-walls remain bulged apart suffIciently for the squeezed bag still to contain said gaseous content thereby to avoid its reaching the patient; and said pressureapplying faces being formed that the said bulged apart sidewall portions form a lateral duct in and at the bottom of the bag to which said outlet opens, and also forms at least one riser duct which opens to said lateral duct and extends for the full height of the bag interior.
Claim 3
Dependent Claim
70 words
Apparatus according to claim 1 wherein said pressure pads comprise a first pad having a pressure-applying face able to bear evenly against a fluid-stocked bag over substantially the entire area of one of its sidewalls, and a second pad having a pressure-applying face which is stepped to provide a projecting portion able to bear evenly against the opposite side-wall of the bag over an area less than its entire area.
Claim 4
Dependent Claim
64 words
Apparatus according to claim 1 which includes an open-fronted cabinet within which a fluid-stocked bag may be suspended, wherein said first pad consists of the rear wall of said cabinet and an inflatable bag placed in front of that wall, and wherein said second pad consists of a door adapted to be closed and held closed relative to the open front of said cabinet.
Claim 5
Dependent Claim
14 words
Apparatus according to claim 1 wherein said second pad is made of transparent material.
Claim 6
Dependent Claim
32 words
Apparatus according to claim 1 which includes a cabinet within which a fluid-stocked bag may be suspended, and wherein said loading means include a manually operable air pump housed inside said cabinet.
References Cited (Backward Citations)
US2515440A
Cited
US2766907A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |