US3675466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sampling valve and system for the detection of predetermined compounds in air
Assignee: T-HYDRONAUTICS Inc A CORP OF TX
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Filing: 1970-08-19
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Granted: 1972-07-11
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Expires: 1990-08-19
Abstract
Abstract A sampling valve for use with a chromatographic column or any other appropriate detection device for enabling the detection of predetermined compounds in an ambient medium, such as air. The valve includes a housing member having a plurality of apertures therein for enabling respective communication with at least a carrier medium, the ambient medium and the chromatographic column. A movable valve body member is mounted within the housing and is provided with a plurality of apertures for selective communication with predetermined ones of the housing member apertures. A platinum gauze member is retained within a predetermined one of the valve body member apertures and is selectively exposed to the ambient medium. The valve body member is then moved and the platinum gauze member is heated to desorb the predetermined compound in the presence of the carrier medium, such as helium, and the carrier medium together with the predetermined compound are passed through the chromatographic column to enable detection of the presence of the predetermined compound.
Inventors
- 👤 Amos Linenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:25
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/16; G01N30/20; G01N30/06; G01N30/12; G01N2030/126; G01N2030/128
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
227 words
In a detection device, a sampling valve for concentrating at least one predetermined compound in an ambient medium comprising: a housing having a first aperture having an inlet and outlet end, both communicating with the ambient medium and a second aperture communicating with the detection device; a valve body movably mounted within the housing and having a Vshaped aperture therein for selective communication with the housing apertures; means for adsorbing said predetermined compound locatable in the valve body aperture; means for sequentially moving the valve body between a first position where the valve body aperture communicates with the first housing aperture to expose the adsorbing means located in the valve body aperture to the ambient medium and to a second position wherE the valve body aperture communicates with the second housing aperture; a tubular member in communicating relationship between the second housing aperture and the detection device; said adsorbing means passing into the tubular member when the valve body aperture is moved to the second position from the first position; means for selectively heating the adsorber means in the tubular member to desorb the predetermined compound from the adsorber means; means for passing a carrier medium over the heated adsorber means to pick up the desorbed compound and transmit it to the detection device; and means for returning the adsorbing means back to the valve body aperture.
Claim 2
Dependent Claim
227 words
In a detection device, a sampling valve for concentrating at least one predetermined compound in an ambient medium comprising: a housing having a first aperture having an inlet and outlet end, both communicating with the ambient medium and a second aperture communicating with the detection device; a valve body movably mounted within the housing and having a Vshaped aperture therein for selective communication with the housing apertures; means for adsorbing said predetermined compound locatable in the valve body aperture; means for sequentially moving the valve body between a first position where the valve body aperture communicates with the first housing aperture to expose the adsorbing means located in the valve body aperture to the ambient medium and to a second position wherE the valve body aperture communicates with the second housing aperture; a tubular member in communicating relationship between the second housing aperture and the detection device; said adsorbing means passing into the tubular member when the valve body aperture is moved to the second position from the first position; means for selectively heating the adsorber means in the tubular member to desorb the predetermined compound from the adsorber means; means for passing a carrier medium over the heated adsorber means to pick up the desorbed compound and transmit it to the detection device; and means for returning the adsorbing means back to the valve body aperture.
Claim 3
Dependent Claim
21 words
The device of claim 1, wherein the valve body aperture is sealed to the ambient medium when in the second position.
Claim 4
Dependent Claim
49 words
The device of claim 1, in which the means for returning the adsorbing means comprises: a holder located within the tubular member for holding the adsorbing means; and means for selectively moving the holder within the tubular member to impell the adsorbing means back into the valve body aperture.
Claim 5
Dependent Claim
14 words
The device of claim 3, wherein the tubular member is inclined to the vertical.
Claim 6
Dependent Claim
17 words
The device of claim 3, wherein the adsorbing means include a substantially spherical mass of adsorptive material.
Claim 7
Dependent Claim
25 words
The device of claim 3, wherein the heating means includes an oven surrounding the tubular member for selectively heating the adsorbing means in its holder.
Claim 8
Dependent Claim
23 words
The device of claim 3, wherein the holder is of magnetizable material and the moving means includes an electromagnet surrounding the tubular member.
Claim 9
Dependent Claim
22 words
The device of claim 3, wherein the carrier medium is supplied to the tubular member between the valve body and the holder.
Claim 10
Dependent Claim
29 words
The device of claim 8, including means for purging the valve body aperture with the carrier medium as the valve body aperture moves between said first and second positions.
Claim 11
Dependent Claim
35 words
The device of claim 9, where the purging means includes a purge aperture in the housing that communicates with the valve body aperture and permits the carrier medium to pass through the valve body aperture.
Claim 12
Independent Claim
304 words
A device for the detection of a predetermined compound in air comprising: a. a gas chromatographic column for separating compounds in a gas stream; b. detection means downstream from said column for indicating the presence of said predetermined compound in the gas stream; c. a sampling valve for concentrating the compound from the air and transferring the compound from the air in an air-free atmosphere to the gas column, said sampling valve comprising: i. a valve housing having an air inlet and outlet, and a discharge outlet communicating with the gas chromatographic column, ii. a valve body movably mounted within the valve housing and having an aperture therein for selective communication with the housing''s air inlet and outlet when the valve body is in a first position and with the discharge outlet when the valve body is in a second position, iii. means for moving said valve between said first and second positions, and iv. adsorber means located within the valve body aperture for adsorbing and concentrating the compound from air; d. means for passing air through the valve housing and the valve body aperture in said first position to expose the adsorber means to the air; e. purge means communicating the valve body aperture with a supply of air-free carrier gas as the valve body passes through a position intermediate said first and second positions to purge the valve body aperture and the adsorber means of residual air; f. heater means for selectively heating the adsorber means after it has adsorbed the compound and been purged of residual air to desorb the compound from the adsorber means; and g. means for passing air-free carrier gas over the heated adsorber means when the valve body aperture is in said second position to pick up the desorbed compound and transmit it to the gas column.
Claim 13
Independent Claim
304 words
A device for the detection of a predetermined compound in air comprising: a. a gas chromatographic column for separating compounds in a gas stream; b. detection means downstream from said column for indicating the presence of said predetermined compound in the gas stream; c. a sampling valve for concentrating the compound from the air and transferring the compound from the air in an air-free atmosphere to the gas column, said sampling valve comprising: i. a valve housing having an air inlet and outlet, and a discharge outlet communicating with the gas chromatographic column, ii. a valve body movably mounted within the valve housing and having an aperture therein for selective communication with the housing''s air inlet and outlet when the valve body is in a first position and with the discharge outlet when the valve body is in a second position, iii. means for moving said valve between said first and second positions, and iv. adsorber means located within the valve body aperture for adsorbing and concentrating the compound from air; d. means for passing air through the valve housing and the valve body aperture in said first position to expose the adsorber means to the air; e. purge means communicating the valve body aperture with a supply of air-free carrier gas as the valve body passes through a position intermediate said first and second positions to purge the valve body aperture and the adsorber means of residual air; f. heater means for selectively heating the adsorber means after it has adsorbed the compound and been purged of residual air to desorb the compound from the adsorber means; and g. means for passing air-free carrier gas over the heated adsorber means when the valve body aperture is in said second position to pick up the desorbed compound and transmit it to the gas column.
Claim 14
Dependent Claim
46 words
The device of claim 11 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 the selective discharge of said capacitor through said adsorber means.
Claim 15
Dependent Claim
32 words
The device of claim 11 wherein said adsorbing means include a piece of platinum gauze or any other adsorptive material of any metal or chemical fixidly mounted within the valve body aperture.
Claim 16
Dependent Claim
42 words
The device of claim 11, wherein the purge means comprises a carrier gas inlet and an outlet for the carrier gas in the valve housing, said inlet and outlet communicating with the valve body aperture as it passes through said intermediate position.
Claim 17
Dependent Claim
72 words
The device of claim 14, including a passage in the valve body communicating with the carrier gas inlet and the discharge outlet when the valve body is in said first position, said carrier gas inlet also communicating with the valve body aperture when the valve body is in said second position to transmit the desorbed compound to the gas column, thereby maintaining a substantially constant flow of carrier gas to the column.
Claim 18
Dependent Claim
82 words
The device of claim 15, wherein the carrier gas inlet comprises a first aperture in the housing communicating with the valve body aperture when said valve body is at said intermediate position and a second aperture in the housing communicating with the valve body aperture when the valve body is at said second position and with the valve body passage when the valve body is at said first position; said first and second apertures communicating with a common supply of carrier gas.
Claim 19
Dependent Claim
20 words
The device of claim 11, wherein the adsorber means is retained within the valve body aperture during exposure and heating.
Claim 20
Independent Claim
266 words
A device for the detection of a predetermined compound in air comprising: a. a gas chromatographic column for separating compounds in a gas stream; b. detection means downstream from said column for indicating the presence of said predetermined compound in the gas stream; c. a sampling valve for concentrating the predetermined compound from the air comprising a valve housing having an air inlet and outlet and a discharge outlet communicating with the gas chromatographic column; d. a valve body movably mounted within the valve housing and having a V-shaped aperture therein for selective communication with the housing''s air inlet and outlet when the valve body is in a first position and with the discharge outlet when the valve body is in a second position; e. means for moving the valve body between said first and second positions; f. adsorber means located in the V-shaped aperture when the valve body is in the first position for adsorbing and concentrating said predetermined compound from the air; g. a tubular member in communicating relationship between the discharge outlet and the column, said adsorber means falling out of the valve body aperture and into the tubular member when the valve body is in the second position; h. means for selectively heating the adsorber means to desorb the compound from the adsorber means when the adsorber means is located in the tubular member; i. means for passing carrier gas over the heated adsorber means to pick up the desorbed compound and transmit it to the detection means; and j. means for returning the adsorber means back into the valve body aperture.
Claim 21
Independent Claim
266 words
A device for the detection of a predetermined compound in air comprising: a. a gas chromatographic column for separating compounds in a gas stream; b. detection means downstream from said column for indicating the presence of said predetermined compound in the gas stream; c. a sampling valve for concentrating the predetermined compound from the air comprising a valve housing having an air inlet and outlet and a discharge outlet communicating with the gas chromatographic column; d. a valve body movably mounted within the valve housing and having a V-shaped aperture therein for selective communication with the housing''s air inlet and outlet when the valve body is in a first position and with the discharge outlet when the valve body is in a second position; e. means for moving the valve body between said first and second positions; f. adsorber means located in the V-shaped aperture when the valve body is in the first position for adsorbing and concentrating said predetermined compound from the air; g. a tubular member in communicating relationship between the discharge outlet and the column, said adsorber means falling out of the valve body aperture and into the tubular member when the valve body is in the second position; h. means for selectively heating the adsorber means to desorb the compound from the adsorber means when the adsorber means is located in the tubular member; i. means for passing carrier gas over the heated adsorber means to pick up the desorbed compound and transmit it to the detection means; and j. means for returning the adsorber means back into the valve body aperture.
Claim 22
Dependent Claim
25 words
The device of claim 18 including means for purging the valve body aperture of ambient medium as it moves between said first and second positions.
Claim 23
Dependent Claim
65 words
The device of claim 19, wherein the carrier medium is supplied to the tubular member and the purging means includes a purge outlet in the valve housing, said valve body aperture communicating with the purge outlet and the discharge outlet of the valve housing as the valve body moves between said first and second positions to flush the aperture and adsorber means of residual air.
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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) | 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 |