Patent US5298025A successfully refreshed from Google Patents.
US5298025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sequential flow rate infusion rate
Assignee: Baxter International Inc
•
Filing: 1993-04-12
•
Granted: 1994-03-29
•
Expires: 2013-04-12
Abstract
Abstract The present invention provides a casing having a plurality of sources of pressurized liquid. The sources of pressurized liquid are preferably contained in at least one elastomeric bladder. Housing is provided to establish fluid communication between the sources of pressurized liquid. Additionally, at least one flow restrictor is provided to regulate the flow of pressurized liquid. A single or a plurality of flow restrictors can be used to regulate the flow of liquid between the sources of pressurized liquid. The plurality of sources of pressurized liquid can be contained under different pressures which can be provided by varying the size of the elastomeric storage area. The casing further contains an inlet port and an exit port in fluid communication with the sources of pressurized liquid to provide for filling and dispensing of the fluid.
Inventors
- 👤 Steve Hessel
- 👤 William C. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:06
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/142; A61M5/145; A61M5/148; A61M5/152; A61M5/1407; A61M5/1408; Y; Y10; Y10S; Y10S128/00; Y10S128/12
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
107 words
A device for infusing liquid into a patient comprising: casing defining a plurality of cavities; resilient elastomeric bladders corresponding to each of the defined cavities, the elastomeric bladders and the defined cavities defining fluid chambers within the interior of the bladders; elongated prestress member contained within the fluid chamber of at least one elastomeric bladder, the prestress member having a substantially uniform, circular cross-sectional shape; the casing further defining fluid communication means adapted for providing fluid communication between the plurality of elastomeric bladders to provide a fluid system; and housing defining a fill port and an exit port in fluid communication with the plurality of elastomeric bladders.
Claim 2
Independent Claim
107 words
A device for infusing liquid into a patient comprising: casing defining a plurality of cavities; resilient elastomeric bladders corresponding to each of the defined cavities, the elastomeric bladders and the defined cavities defining fluid chambers within the interior of the bladders; elongated prestress member contained within the fluid chamber of at least one elastomeric bladder, the prestress member having a substantially uniform, circular cross-sectional shape; the casing further defining fluid communication means adapted for providing fluid communication between the plurality of elastomeric bladders to provide a fluid system; and housing defining a fill port and an exit port in fluid communication with the plurality of elastomeric bladders.
Claim 3
Dependent Claim
17 words
The device of claim 1 wherein the fluid communication means includes lumens defined in the prestress member.
Claim 4
Dependent Claim
25 words
The device of claim 1 wherein the fluid chambers include means for providing different fluid flow rates from each of the plurality of fluid chambers.
Claim 5
Dependent Claim
20 words
The device of claim 3 wherein the means for providing different fluid flow rates includes providing different sized elastomeric bladders.
Claim 6
Dependent Claim
25 words
The device of claim 3 wherein the means for providing different fluid flow rates includes providing at lest one flow restrictor in the fluid system.
Claim 7
Dependent Claim
16 words
The device of claim 1 wherein the plurality of elastomeric bladders are in series fluid communication.
Claim 8
Independent Claim
87 words
A device for infusing liquid into a patient comprising: casing defining of sources of pressurized liquid in fluid communication with each other to provide a fluid system; housing defining a fill port and an exit port in fluid communication with the sources of pressurized liquid; and means for providing different fluid flow rates from each of the plurality of sources of pressurized liquid, the means for providing different fluid flow rates comprising at least one capillary tube flow restrictor secured within a lumen in the fluid system.
Claim 9
Independent Claim
87 words
A device for infusing liquid into a patient comprising: casing defining of sources of pressurized liquid in fluid communication with each other to provide a fluid system; housing defining a fill port and an exit port in fluid communication with the sources of pressurized liquid; and means for providing different fluid flow rates from each of the plurality of sources of pressurized liquid, the means for providing different fluid flow rates comprising at least one capillary tube flow restrictor secured within a lumen in the fluid system.
Claim 10
Dependent Claim
30 words
The device of claim 7 wherein the sources of pressurized liquid includes a resilient elastomeric bladder which defines a fluid chamber containing pressurized liquid within the interior of the bladder.
Claim 11
Dependent Claim
18 words
The device of claim 8 further wherein the fluid chambers are contained in cavities defined in the casing.
Claim 12
Dependent Claim
21 words
The device of claim 8 wherein the means for providing different fluid flow rates further includes providing different sized elastomeric bladders.
Claim 13
Dependent Claim
21 words
The device of claim 7 wherein the plurality of sources of pressurized liquid are in series fluid communication with each other.
Claim 14
Independent Claim
111 words
A device for infusing liquid into a patient comprising: casing defining a plurality of cavities; resilient elastomeric bladders corresponding to each of the defined cavities, the elastomeric bladders and the defined cavities defining fluid chambers within the interior of the bladders; a prestress member contained within the fluid chamber of at least one elastomeric bladder; the casing further defining fluid communication means adapted for providing fluid communication in series between the plurality of elastomeric bladders to provide a fluid system wherein the fluid communication means comprises lumens defined in the prestress member; and housing defining a fill port and an exit port in fluid communication with the plurality of elastomeric bladders.
Claim 15
Independent Claim
111 words
A device for infusing liquid into a patient comprising: casing defining a plurality of cavities; resilient elastomeric bladders corresponding to each of the defined cavities, the elastomeric bladders and the defined cavities defining fluid chambers within the interior of the bladders; a prestress member contained within the fluid chamber of at least one elastomeric bladder; the casing further defining fluid communication means adapted for providing fluid communication in series between the plurality of elastomeric bladders to provide a fluid system wherein the fluid communication means comprises lumens defined in the prestress member; and housing defining a fill port and an exit port in fluid communication with the plurality of elastomeric bladders.
Claim 16
Independent Claim
103 words
A device for infusing fluid into a patient comprising: casing defines a plurality of sources of pressurized liquid in fluid communication with each other to provide a fluid system, the sources of pressurized liquid each comprising a resilient elastomeric bladder which defines a fluid chamber for containing pressurized liquid within the interior of the bladder; housing defining a fill port and an exit portion fluid communication with the sources of pressurized liquid; and means for providing different fluid flow rates from each of the plurality of sources of pressurized liquid, the means for providing different fluid flow rates comprising different sized elastomeric bladders.
Claim 17
Independent Claim
103 words
A device for infusing fluid into a patient comprising: casing defines a plurality of sources of pressurized liquid in fluid communication with each other to provide a fluid system, the sources of pressurized liquid each comprising a resilient elastomeric bladder which defines a fluid chamber for containing pressurized liquid within the interior of the bladder; housing defining a fill port and an exit portion fluid communication with the sources of pressurized liquid; and means for providing different fluid flow rates from each of the plurality of sources of pressurized liquid, the means for providing different fluid flow rates comprising different sized elastomeric bladders.
Claim 18
Dependent Claim
18 words
The device of claim 13 further wherein the fluid cambers are contained in cavities defined in the casing.
Claim 19
Dependent Claim
26 words
The device of claim 13 wherein the means for providing different fluid flow rates further includes providing at lest one flow restrictor in the fluid system.
Claim 20
Dependent Claim
21 words
The device of claim 13 wherein the plurality of sources of pressurized liquid are in series fluid communication with each other.
References Cited (Backward Citations)
US2589728A
Cited
US3698595A
Cited
US3767078A
Cited
US4391600A
Cited
US4544371A
Cited
US4548607A
Cited
US4702397A
Cited
US4741733A
Cited
US4857055A
Cited
US4769008A
Cited
US4915693A
Cited
US5011477A
Cited
US5019047A
Cited
US5080652A
Cited
US5049141A
Cited
US5135497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-03-28 | 1997-09-27 | 1998-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-28 | 2001-09-27 | 2002-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-28 | 2005-09-27 | 2006-03-29 | $7700.00 | Window Closed / Lapsed |