Patent US3385426A successfully refreshed from Google Patents.
US3733908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sampling valve and compound detection system
Assignee: T-HYDRONAUTICS Inc A CORP OF TX
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Filing: 1971-04-28
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Granted: 1973-05-22
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Expires: 1991-04-28
Abstract
Abstract A sampling valve is provided for use with a chromatographic column or any other appropriate detection device for use in the detection of compounds in an ambient medium, such as air. The valve includes a housing having a plurality of apertures therein for respective communication with at least a carrier medium, the ambient medium and the detection device. A movable valve body is mounted within the housing and is provided with a plurality of apertures for selective communication with predetermined ones of the housing apertures. A platinum wire or other absorbing means is retained within a predetermined one of the valve body apertures and is selectively exposed to the ambient medium. The valve body is then moved and the platinum wire is heated to desorb the compounds in the presence of the carrier medium, such as helium, and the carrier medium, together with the compounds, are passed through the detection device to enable detection of the presence of the compounds.
Inventors
- 👤 A Linenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:29
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/10; G01N35/1095; G01N35/1097; G01N30/00; G01N30/02; G01N30/04; G01N30/16; G01N30/20; G01N30/06; G01N30/12; G01N2030/126; G01N2030/128
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
219 words
A sampling valve for use with a detection device, for concentrating at least one compound from an ambient medium and for enabling the compound to be injected into the detection device, comprising: a housing having a plurality of apertures communicating respectively with at least a supply of a carrier medium, said ambient medium and the detection device; a valve body movably mounted within the housing and having a plurality of apertures therein for selective communication with predetermined ones of said housing apertures; said valve body further having first and second channels in fluid communication with and positioned adjacent to the ends of a first one of said valve body apertures to enable said first valve body aperture to be selectively positioned in fluid communication with said housing apertures; said valve body having first and second passages in fluid communication with and positioned adjacent to the ends of a second one of said valve body apertures; means for adsorbing said compound from the ambient medium retained within said second valve body aperture; means in operative relationship for enabling selective movement of the valve body; and means in operative relationship for selectively heating said adsorber means to desorb the compound from the adsorbing means when the second one of said valve body apertures is in fluid communication with the detection device.
Claim 2
Dependent Claim
219 words
A sampling valve for use with a detection device, for concentrating at least one compound from an ambient medium and for enabling the compound to be injected into the detection device, comprising: a housing having a plurality of apertures communicating respectively with at least a supply of a carrier medium, said ambient medium and the detection device; a valve body movably mounted within the housing and having a plurality of apertures therein for selective communication with predetermined ones of said housing apertures; said valve body further having first and second channels in fluid communication with and positioned adjacent to the ends of a first one of said valve body apertures to enable said first valve body aperture to be selectively positioned in fluid communication with said housing apertures; said valve body having first and second passages in fluid communication with and positioned adjacent to the ends of a second one of said valve body apertures; means for adsorbing said compound from the ambient medium retained within said second valve body aperture; means in operative relationship for enabling selective movement of the valve body; and means in operative relationship for selectively heating said adsorber means to desorb the compound from the adsorbing means when the second one of said valve body apertures is in fluid communication with the detection device.
Claim 3
Dependent Claim
44 words
A sampling valve as in claim 1 wherein the housing includes at least a first aperture in fluid communication with the ambient medium, a second aperture in fluid communication with the carrier medium and a third aperture in fluid communication with the detection device.
Claim 4
Dependent Claim
62 words
A sampling valve as in claim 2 wherein said movement means include means for enabling sequential movement of the valve body between a first position where the second valve body aperture is in fluid communication with the first housing aperture and to a second position where the second valve body aperture is in fluid communication with the second and third housing apertures.
Claim 5
Dependent Claim
47 words
A sampling valve as in claim 3 wherein the first valve body aperture is in fluid communication with the second and third housing apertures when the valve body is in said first position to enable a substantially constant flow of the carrier medium into the detection device.
Claim 6
Dependent Claim
47 words
A sampling valve as in claim 4 wherein said passages are positioned to enable brief purging communication between the first and second housing apertures via the second valve body aperture and the passages as the valve body is moved between the first position and the second position.
Claim 7
Dependent Claim
38 words
A sampling valve as in claim 5 further including a fourth housing aperture positioned for fluid communication with the first housing aperture and with the second valve body aperture when the valve body is in the first position.
Claim 8
Dependent Claim
25 words
A sampling valve as in claim 6 wherein the valve body is in the form of a truncated cone for enhanced sealing with the housing.
Claim 9
Dependent Claim
47 words
A sampling valve as in claim 6 wherein said heating means include: a storage capacitor; leads in circuit with said adsorbing means and said capacitor; and a switch in circuit with said leads and said capacitor for enabling selective discharge of the capacitor through said adsorber means.
Claim 10
Dependent Claim
17 words
A sampling valve as in claim 5 wherein said adsorbing means includes a coil of platinum wire.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |