Patent US3675658A successfully refreshed from Google Patents.
US3675658A
Expired / Lapsed
US
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Catheter with valved fluid reservoir
Assignee: Kendall Co
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Filing: 1970-09-03
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Granted: 1972-07-11
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Expires: 1990-09-03
Abstract
Abstract In a self-inflating catheter provided with a reservoir of fluid under pressure, the reservoir is provided with internal slit valves, opening by distortion under digital pressure, to control the flow of inflating fluid.
Inventors
- 👤 Glenn N Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:44
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/1018; A61M25/10184; A61M25/10185; A61M25/10181; A61M25/10183
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
146 words
In a retention-type catheter containing a self-inflating mechanism comprising a reservoir filled with fluid under pressure, said reservoir having an outlet portion connected by a lumen to an inflatable retention balloon situated in the distal end of said catheter, and a substantially oppositely-placed inlet portion, that improvement which comprises the provision in at least the outlet portion of said reservoir of a soft, resilient hollow cylindrical slit valve with one closed end, the closed end of said valve being oriented toward said reservoir, the closed end of said valve containing a slit which opens by distortion upon the application of digital pressure on the side walls of said valve and closes upon the release of said pressure, the fluid pressure in the reservoir being in excess of the pressure needed to inflate the retention balloon but less than the pressure needed to open said slit valve.
Claim 2
Dependent Claim
146 words
In a retention-type catheter containing a self-inflating mechanism comprising a reservoir filled with fluid under pressure, said reservoir having an outlet portion connected by a lumen to an inflatable retention balloon situated in the distal end of said catheter, and a substantially oppositely-placed inlet portion, that improvement which comprises the provision in at least the outlet portion of said reservoir of a soft, resilient hollow cylindrical slit valve with one closed end, the closed end of said valve being oriented toward said reservoir, the closed end of said valve containing a slit which opens by distortion upon the application of digital pressure on the side walls of said valve and closes upon the release of said pressure, the fluid pressure in the reservoir being in excess of the pressure needed to inflate the retention balloon but less than the pressure needed to open said slit valve.
Claim 3
Dependent Claim
43 words
A catheter according to claim 1 in which a pair of resilient slit valves of the type described therein are fixed into both the inlet and the outlet portions of the reservoir, the closed ends of both valves being oriented toward saId reservoir.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |