Patent US2662833A successfully refreshed from Google Patents.
Patent US3678656A successfully refreshed from Google Patents.
US3678656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separating device for mixtures of gaseous or vaporous substances, especially for separating a carrier gas from a fraction to be analyzed in a combined gaschromatograph and mass-spectrometer
Assignee: Individual
•
Filing: 1970-04-06
•
Granted: 1972-07-25
•
Expires: 1990-04-06
Abstract
Abstract This invention relates to a device for separating mixtures of gasses or vapors. The device utilizes a separating chamber having an inlet for admitting the mixture by viscous flow. The chamber has two outlets, one of which permits molecular flow and the other of which permits viscous flow. Separation occurs when the lower molecular weight fraction of the mixture predominantly leaves the chamber through the outlet permitting molecular flow while the higher molecular weight fraction leaves through the viscous flow outlet. The device may be employed, for example, to separate the helium carrier gas from a hydrocarbon where the mixture is eluted from a gas chromatograph and it is desired to concentrate the hydrocarbon for analysis by mass spectrometry.
Inventors
- 👤 Curt Brunnee
- 👤 Hans-Joachim Bultemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:12
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/84; G01N30/62; G01N30/72; G01N30/7293
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
131 words
A device for separating mixtures of gaseous or vaporous substances into a first fraction of lower molecular weight and a second fraction of higher molecular weight, the device comprising means forming a separating chamber, an inlet through which the mixture viscously flows into the separating chamber, the separating chamber having a movable wall spaced from a fixed wall to provide an elongated narrow slit therebetween, means coacting with the movable wall for changing the gap between the movable wall and the fixed wall whereby the narrow slit provides a first exit whose gap is adjustable within the range permitting molecular flow of the first fraction through the slit to an exhaust passage, and the separating chamber having a second exit permitting the second fraction to viscously Flow out of the chamber.
Claim 2
Independent Claim
131 words
A device for separating mixtures of gaseous or vaporous substances into a first fraction of lower molecular weight and a second fraction of higher molecular weight, the device comprising means forming a separating chamber, an inlet through which the mixture viscously flows into the separating chamber, the separating chamber having a movable wall spaced from a fixed wall to provide an elongated narrow slit therebetween, means coacting with the movable wall for changing the gap between the movable wall and the fixed wall whereby the narrow slit provides a first exit whose gap is adjustable within the range permitting molecular flow of the first fraction through the slit to an exhaust passage, and the separating chamber having a second exit permitting the second fraction to viscously Flow out of the chamber.
Claim 3
Dependent Claim
49 words
the separating device according to claim 1 wherein one of the walls providing the first exit slit has a thin edge defining one side of the slit and the other wall has a relatively broad surface parallel to the thin edge and defining the other side of the slit.
Claim 4
Dependent Claim
33 words
The separating device according to claim 1, wherein the separating chamber is in the form of a long channel having the inlet at one end and the second exit at the opposite end.
Claim 5
Dependent Claim
20 words
The separating device according to claim 3, wherein the first exit extends substantially along the entire length of the channel.
Claim 6
Dependent Claim
18 words
The separating device according to claim 4, wherein the long channel is in the form of a spiral.
Claim 7
Dependent Claim
29 words
The separating device according to claim 5, wherein the device further includes an exhaust passage forming a spiral contiguous to the separating chamber and forming therewith a double spiral.
Claim 8
Dependent Claim
34 words
The separating device according to claim 2 wherein the separating chamber is annular, and the inlet and second exit are disposed at diametrically opposite locations on the annulus to obtain the greatest separation therebetween.
Claim 9
Dependent Claim
77 words
The separating device according to claim 1, further comprising means forming a second separating chamber, the second chamber having an independently moveable wall spaced from a fixed wall to provide an elongated narrow slit therebetween whose gap can be adjusted, the two separating chambers being connected by a channel dimensioned for viscous flow whereby the velocity of flow in the connecting channel is greater than the velocity of diffusion of the second fraction across the first exit.
References Cited (Backward Citations)
US1747155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |