Patent US3693407A successfully refreshed from Google Patents.
US3693407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vented sampling device
Assignee: Kendall Co
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Filing: 1971-07-01
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Granted: 1972-09-26
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Expires: 1991-07-01
Abstract
Abstract In measuring manometrically the pressure of body fluids such as spinal fluid, a connector is provided which comprises an airpervious liquid-impervious closure plug at one end, together with a sampling slit in the surface of the connector.
Inventors
- 👤 Daniel M Mcwhorter
- 👤 Frank K Villari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:33
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/03; A61B5/032; G; G01; G01L; G01L19/00; G01L19/0007
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
111 words
A flexible air-vented closure for a conduit for liquids which comprises a flexible-waLled conduit providing a chamber open at one end, a passageway through the wall of said conduit, said passageway being pervious to gases but impervious to liquids to permit the escape of gases from said chamber when displaced by the introduction of liquid into said chamber; and an openable slit in a wall portion of said closure, the opposing wall edges of said slit normally lying in abuttment so as to prevent leakage of fluid from said chamber, said slit forming a drainage opening by distortion of the flexible walls to separate the abutting opposite edges of said slit.
Claim 2
Dependent Claim
111 words
A flexible air-vented closure for a conduit for liquids which comprises a flexible-waLled conduit providing a chamber open at one end, a passageway through the wall of said conduit, said passageway being pervious to gases but impervious to liquids to permit the escape of gases from said chamber when displaced by the introduction of liquid into said chamber; and an openable slit in a wall portion of said closure, the opposing wall edges of said slit normally lying in abuttment so as to prevent leakage of fluid from said chamber, said slit forming a drainage opening by distortion of the flexible walls to separate the abutting opposite edges of said slit.
Claim 3
Dependent Claim
28 words
The closure according to claim 1 in which the openable slit is located at a point lying between the open end of said closure and the gas-pervious passageway.
Claim 4
Dependent Claim
17 words
The closure according to claim 1 in which the flexible conduit is readily deflectable by digital manipulation.
Claim 5
Dependent Claim
133 words
A conduit having a gas-ventable chamber therein for the containment of liquid therein, at least a portion of the walls of said chamber being flexible, which comprises: an opening for the introduction of liquids into said chamber; a passageway from said chamber to the atmosphere outside of said chamber, said passageway being pervious to gases but impervious to liquids to permit the escape of gases from said chamber when displaced by the introduction of liquids into said chamber; and an openable slit in the flexible-walled portion of the conduit, the opposing wall edges of said slit being in abuttment so as to prevent leakage of fluid from said chamber, said slit forming a drainage opening by distortion of the flexible portion of the wall to separate the abutting opposite edges of said slit.
Claim 6
Dependent Claim
133 words
A conduit having a gas-ventable chamber therein for the containment of liquid therein, at least a portion of the walls of said chamber being flexible, which comprises: an opening for the introduction of liquids into said chamber; a passageway from said chamber to the atmosphere outside of said chamber, said passageway being pervious to gases but impervious to liquids to permit the escape of gases from said chamber when displaced by the introduction of liquids into said chamber; and an openable slit in the flexible-walled portion of the conduit, the opposing wall edges of said slit being in abuttment so as to prevent leakage of fluid from said chamber, said slit forming a drainage opening by distortion of the flexible portion of the wall to separate the abutting opposite edges of said slit.
Claim 7
Dependent Claim
16 words
The conduit of claim 4 wherein said slit is located between said opening and said passageway.
Claim 8
Dependent Claim
25 words
The conduit of claim 4 wherein said chamber has a passageway in communication therewith to conduct liquids from said chamber to a liquid monitoring device.
Claim 9
Dependent Claim
12 words
The conduit of claim 6 wherein said device is a closed-end manometer.
Claim 10
Dependent Claim
25 words
The conduit of claim 6 wherein the slit and the passageway communicating with said monitoring device are located intermediate the opening and the gas-pervious passageway.
Claim 11
Dependent Claim
27 words
The conduit of claim 8 wherein said gas-previous passageway comprises an opening in the wall of said conduit and a plug of microporous material closing said opening.
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) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |