US3751880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carrier gas separating unit
Assignee: UNIVERSAL MONITOR CORP
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Filing: 1972-02-22
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Granted: 1973-08-14
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Expires: 1992-02-22
Abstract
Abstract A gas separating unit is provided for enriching a gas sample emerging from a gas chromatograph, or other source, such as the ambient atmosphere, liquid inlet device, etc., before the sample is introduced to a mass spectrometer gas analyzer. This separation is achieved by removing the carrier gas of the sample from the sample constituents which are to be subjected to mass spectrometric analysis in the analyzer. The separating unit of the invention makes use of a semipermeable membrane which is mounted in a unique housing. The housing is constructed, as will be described, so that the sample and carrier gases are directed across the membrane in a manner so as to make full use of the surface of the membrane, and to assure that all the gas mixture passing into the separating unit contacts the membrane.
Inventors
- 👤 M Holm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:43
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/62; G01N30/72; G01N30/7206; G01N30/722; B; B01; B01D; B01D53/00; B01D53/22; H; H01; H01J; H01J49/00; H01J49/02; H01J49/04; H01J49/0422; H01J49/0427
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
248 words
A gas separator unit for coupling a source, such as a gas chromatograph, or the like, to a gas analyzer, comprising: a housing defining an enclosed and hermetically sealed chamber; membrane means hermetically mounted within said chamber and extending thereacross to divide said chamber into two hermetically isolated compartments; a baffle mounted in one of said compartments and extending across a face of said membrane means in close proximity therewith and in spaced and parallel relationship; inlet means coupled to said housing for introducing a mixture of sample and carrier gases from said source into the space between said baffle and said face of said membrane means; first outlet means coupled to said housing and extending out from the other compartment of said chamber for passing the sample gases to said analyzer; and second outlet means mounted on said housing and extending out from said first-mentioned compartment of said chamber for exhausting said carrier gases, said inlet means comprising an elongated tubular member extending into said housing and affixed to said baffle to surround a central aperture therein, and said inlet means further comprising a tubular housing for supporting said tubular member on said first-named housing, said tubular housing and said tubular member being radially spaced from one another and in coaxial relationship so as to define an annular passage into said one of said compartments; and said second outlet means comprising an elongated tubular member communicating with said annular passage, and supported radially on said tubular housing.
Claim 2
Dependent Claim
248 words
A gas separator unit for coupling a source, such as a gas chromatograph, or the like, to a gas analyzer, comprising: a housing defining an enclosed and hermetically sealed chamber; membrane means hermetically mounted within said chamber and extending thereacross to divide said chamber into two hermetically isolated compartments; a baffle mounted in one of said compartments and extending across a face of said membrane means in close proximity therewith and in spaced and parallel relationship; inlet means coupled to said housing for introducing a mixture of sample and carrier gases from said source into the space between said baffle and said face of said membrane means; first outlet means coupled to said housing and extending out from the other compartment of said chamber for passing the sample gases to said analyzer; and second outlet means mounted on said housing and extending out from said first-mentioned compartment of said chamber for exhausting said carrier gases, said inlet means comprising an elongated tubular member extending into said housing and affixed to said baffle to surround a central aperture therein, and said inlet means further comprising a tubular housing for supporting said tubular member on said first-named housing, said tubular housing and said tubular member being radially spaced from one another and in coaxial relationship so as to define an annular passage into said one of said compartments; and said second outlet means comprising an elongated tubular member communicating with said annular passage, and supported radially on said tubular housing.
Claim 3
Dependent Claim
30 words
The combination defined in claim 1, in which said inlet means and said first outlet means are in axial alignment with one another on opposite sides of said membrane means.
Claim 4
Dependent Claim
36 words
The combination defined in claim 1, in which said membrane means comprises a semipermeable membrane of which the permeability of carrier gases and the permeability of sample gases is in a ratio of less than unity.
Claim 5
Dependent Claim
26 words
The combination defined in claim 3, in which said semipermeable membranes are constructed from material selected from a group consisting of polymers and stationary liquid phases.
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |