US3583401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vented closed drainage system with double lumen tube
Assignee: CR Bard Inc
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Filing: 1969-01-21
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Granted: 1971-06-08
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Expires: 1989-01-21
Abstract
Abstract Means for eliminating the negative pressure problem in a closed urinary (or other) drainage system by use of a drainage tube having two lumens, in communication adjacent the upstream end of the tube and also adjacent the lower end where the tube lumens open into a drip chamber having a vent, the drip chamber preferably being formed with an enlarged base and large flutter valve extending into a drainage receptacle such as a bedside bag.
Inventors
- 👤 Vincent L Vailiancourt
- 👤 Robert W Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:05
CPC Classifications
A; A61; A61F; A61F5/00; A61F5/44; A61F5/441
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
72 words
A closed system for drainage of liquid from a body cavity comprising a tubular conduit having a single liquid inlet opening in the cavity and a downwardly extending section, and a drainage receptacle in a position to receive liquid from said conduit, the downwardly extending section including a drainage tube having two lumens which are in communication at the upstream end of the tube and adjacent the downstream end of the tube.
Claim 2
Dependent Claim
72 words
A closed system for drainage of liquid from a body cavity comprising a tubular conduit having a single liquid inlet opening in the cavity and a downwardly extending section, and a drainage receptacle in a position to receive liquid from said conduit, the downwardly extending section including a drainage tube having two lumens which are in communication at the upstream end of the tube and adjacent the downstream end of the tube.
Claim 3
Dependent Claim
36 words
A system according to claim 1 which includes a drip chamber into which projects the lower end of the tube, communication between the lumens being through said drip chamber and said chamber being vented to atmosphere.
Claim 4
Dependent Claim
35 words
A system according to claim 1 in which the tubular conduit comprises a catheter and an adapter connecting the catheter to the drainage tube, communication between the lumens being through a passage within said adapter.
Claim 5
Dependent Claim
36 words
A system according to claim 3 which includes a drip chamber into which projects the lower end of the tube, communication between the lumens being through said drip chamber and said chamber being vented to atmosphere.
Claim 6
Dependent Claim
20 words
A system according to claim 2 in which the drip chamber is provided with a flutter valve on its outlet.
Claim 7
Dependent Claim
29 words
A system according to claim 2 in which the lower portion of the drip chamber is enlarged and is provided with a wide flaring flutter valve on its outlet.
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |