US5053031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump infusion system
Assignee: Baxter International Inc
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Filing: 1989-03-21
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Granted: 1991-10-01
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Expires: 2009-03-21
Abstract
Abstract An infusion system includes an implantable housing having a storage reservoir that is dimensioned and arranged to contain a supply of a medication and a holding reservoir that is dimensioned and arranged to receive a dosage of the medication from the storage reservoir. A pump assembly is included for enabling a patient to cause a dosage of the medication to be transferred from the storage reservoir to the holding reservoir, and pressurizing components maintain the dosage under pressure within the holding reservoir in order to cause the dosage to discharge through an output port to the infusion location. One embodiment accomplishes this with an elongated bladder of elastomeric material in fluid communication with the storage reservoir and the output port. The bladder inflates as it fills with the dosage to maintain the dosage under pressure, and a capillary element disposed intermediate the bladder and the output port restricts the rate of discharge. This embodiment allows the dispensing of medication at a uniform constant flow rate.
Inventors
- 👤 Alexander S. Borsanyi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:47
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/142; A61M5/14244; A61M5/14276; A61M5/1428; A61M5/141; Y; Y10; Y10S; Y10S128/00; Y10S128/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
152 words
An infusion system comprising a non-metallic housing sized to contain: (a) a storage reservoir having inlet means leading from the exterior to the interior of the housing; (b) a holding reservoir in fluid communication with the storage reservoir, said holding reservoir being smaller in volume than said storage reservoir; (c) an elastomeric bladder means contained within the holding reservoir for maintaining the fluid located therein under continual constant pressure, said bladder means expanding with said fluid to exert said continual constant pressure; (d) pump means actuated by external manual pressure for moving a dosage of fluid from the storage reservoir into the holding reservoir, wherein said bladder means expands and exerts said continual constant pressure on said fluid; (e) an outlet port leading from the holding reservoir to the exterior of the housing; and (f) means for restricting the rate at which fluid discharges from the holding reservoir through the outlet port.
Claim 2
Dependent Claim
152 words
An infusion system comprising a non-metallic housing sized to contain: (a) a storage reservoir having inlet means leading from the exterior to the interior of the housing; (b) a holding reservoir in fluid communication with the storage reservoir, said holding reservoir being smaller in volume than said storage reservoir; (c) an elastomeric bladder means contained within the holding reservoir for maintaining the fluid located therein under continual constant pressure, said bladder means expanding with said fluid to exert said continual constant pressure; (d) pump means actuated by external manual pressure for moving a dosage of fluid from the storage reservoir into the holding reservoir, wherein said bladder means expands and exerts said continual constant pressure on said fluid; (e) an outlet port leading from the holding reservoir to the exterior of the housing; and (f) means for restricting the rate at which fluid discharges from the holding reservoir through the outlet port.
Claim 3
Dependent Claim
27 words
The system as recited in claim 1, further comprising: catheter means connected in fluid communication with the outlet port for conveying the fluid to a remote location.
Claim 4
Dependent Claim
23 words
The infusion system of claim 1 wherein said restricting means includes a capillary element disposed intermediate the holding reservoir and the outlet port.
Claim 5
Dependent Claim
138 words
An infusion system comprising a non-metallic housing sized to contain: (a) a storage reservoir having inlet means leading from the exterior to the interior of the housing; (b) a holding reservoir in fluid communication with the storage reservoir, said holding reservoir being smaller in volume than said storage reservoir; (c) an elastomeric wall associated with the holding reservoir for maintaining the fluid located therein under continual constant pressure; (d) pump means actuated by external manual pressure for moving a dosage of fluid from the storage reservoir into the holding reservoir, wherein said elastomeric wall expands and exerts said continual constant pressure on said fluid; (e) an outlet port leading from the holding reservoir to the exterior of the housing; and (f) means for restricting the rate at which fluid discharges from the holding reservoir through the outlet port.
Claim 6
Dependent Claim
138 words
An infusion system comprising a non-metallic housing sized to contain: (a) a storage reservoir having inlet means leading from the exterior to the interior of the housing; (b) a holding reservoir in fluid communication with the storage reservoir, said holding reservoir being smaller in volume than said storage reservoir; (c) an elastomeric wall associated with the holding reservoir for maintaining the fluid located therein under continual constant pressure; (d) pump means actuated by external manual pressure for moving a dosage of fluid from the storage reservoir into the holding reservoir, wherein said elastomeric wall expands and exerts said continual constant pressure on said fluid; (e) an outlet port leading from the holding reservoir to the exterior of the housing; and (f) means for restricting the rate at which fluid discharges from the holding reservoir through the outlet port.
Claim 7
Dependent Claim
23 words
The infusion system of claim 4 wherein said restricting means includes a capillary element disposed intermediate the holding reservoir and the outlet port.
Claim 8
Dependent Claim
167 words
An infusion system comprising a non-metallic housing sized to contain: (a) a storage reservoir having inlet means leading from the exterior to the interior of the housing; (b) a holding reservoir in fluid communication with the storage reservoir, said holding reservoir being smaller in volume than said storage reservoir and including at least one elastomeric wall, with the volume of said holding reservoir to the volume of said reservoir being provided to ensure that said elastomeric wall expands upon introduction of said fluid to said holding reservoir to maintain the fluid located therein under continual constant pressure; (c) pump means actuated by external manual pressure for moving a dosage of fluid from the storage reservoir into the holding reservoir, wherein said elastomeric wall expands and exerts said continual constant pressure on said fluid; (d) an outlet port leading from the holding reservoir to the exterior of the housing; and (e) means for restricting the rate at which fluid discharges from the holding reservoir through the outlet port.
Claim 9
Dependent Claim
167 words
An infusion system comprising a non-metallic housing sized to contain: (a) a storage reservoir having inlet means leading from the exterior to the interior of the housing; (b) a holding reservoir in fluid communication with the storage reservoir, said holding reservoir being smaller in volume than said storage reservoir and including at least one elastomeric wall, with the volume of said holding reservoir to the volume of said reservoir being provided to ensure that said elastomeric wall expands upon introduction of said fluid to said holding reservoir to maintain the fluid located therein under continual constant pressure; (c) pump means actuated by external manual pressure for moving a dosage of fluid from the storage reservoir into the holding reservoir, wherein said elastomeric wall expands and exerts said continual constant pressure on said fluid; (d) an outlet port leading from the holding reservoir to the exterior of the housing; and (e) means for restricting the rate at which fluid discharges from the holding reservoir through the outlet port.
Claim 10
Dependent Claim
23 words
The infusion system of claim 6 wherein said restricting means includes a capillary element disposed intermediate the holding reservoir and the outlet port.
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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) | 1994-09-30 | 1995-04-01 | 1995-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-30 | 1999-04-01 | 1999-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-30 | 2003-04-01 | 2003-10-01 | $7700.00 | Window Closed / Lapsed |