US4597298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrodynamic sample introducing system
Assignee: BIFOK AB
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Filing: 1984-12-18
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Granted: 1986-07-01
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Expires: 2004-12-18
Abstract
Abstract A sample introduction system comprises a sampling circuit and a carrier stream circuit where the two circuits share a volumetric conduit which is at all times connected to and simultaneously opened to both sampling and carrier circuits. This system allows, by a controlled combination of hydrostatic and hydrodynamic forces, to create a well-defined sample zone within the volumetric circuit and then to transport this zone, in a well-reproduced manner, into a continuous flow analyzer where an assay of sample solution components may be performed quantitatively, if necessary even with the aid of chemical reactions, from the signal as provided by a flow-through detector.
Inventors
- 👤 Jaromir Ruzicka
- 👤 Elo H. Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:33
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/08; G01N35/085; G01N35/10; G01N35/1095
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
294 words
A method for introducing a volume of liquid sample into a liquid carrier stream in a continuous liquid flow analysis system comprising the steps of: flowing a liquid carrier stream through a conduit having a common inlet through which said carrier stream and a liquid sample stream are both introduced into said conduit, a volumetric conduit portion defining a sample zone having a sample volume and a common outlet through which said carrier stream an said sample stream are both removed from said conduit wherein flowing said carrier stream through said conduit is provided by pumping said carrier stream into said conduit at a location upstream from said conduit and simultaneously pumping said carrier stream from said conduit at a location downstream from said conduit; maintaining said sample stream in flow communication with both said common inlet and outlet during flow of said carrier stream therethrough, and wherein the flow of said sample stream is stopped during flow of said carrier stream through said conduit; stopping the flow of said carrier stream through said common inlet into said conduit wherein stopping of said carrier stream flow is provided by simultaneously stopping said pumping at said upstream and downstream locations; maintaining said carrier stream in flow communication with said volumetric conduit portion at said common inlet and outlet during flow of said sample stream therethrough; flowing said sample stream through said common inlet, volumetric conduit portion and common outlet to provide a liquid sample volume equal to said sample volume in said volumetric conduit portion; stopping the flow of said sample stream through said volumetric conduit portion; and flowing the carrier stream through said conduit to sweep said sample volume from said volumetric conduit portion to thereby introduce said sample volume into said carrier stream.
Claim 2
Independent Claim
294 words
A method for introducing a volume of liquid sample into a liquid carrier stream in a continuous liquid flow analysis system comprising the steps of: flowing a liquid carrier stream through a conduit having a common inlet through which said carrier stream and a liquid sample stream are both introduced into said conduit, a volumetric conduit portion defining a sample zone having a sample volume and a common outlet through which said carrier stream an said sample stream are both removed from said conduit wherein flowing said carrier stream through said conduit is provided by pumping said carrier stream into said conduit at a location upstream from said conduit and simultaneously pumping said carrier stream from said conduit at a location downstream from said conduit; maintaining said sample stream in flow communication with both said common inlet and outlet during flow of said carrier stream therethrough, and wherein the flow of said sample stream is stopped during flow of said carrier stream through said conduit; stopping the flow of said carrier stream through said common inlet into said conduit wherein stopping of said carrier stream flow is provided by simultaneously stopping said pumping at said upstream and downstream locations; maintaining said carrier stream in flow communication with said volumetric conduit portion at said common inlet and outlet during flow of said sample stream therethrough; flowing said sample stream through said common inlet, volumetric conduit portion and common outlet to provide a liquid sample volume equal to said sample volume in said volumetric conduit portion; stopping the flow of said sample stream through said volumetric conduit portion; and flowing the carrier stream through said conduit to sweep said sample volume from said volumetric conduit portion to thereby introduce said sample volume into said carrier stream.
Claim 3
Dependent Claim
27 words
A method according to claim 1 wherein said method is carrier out in repeated sequences to introduce a series of liquid sample volumes into said carrier stream.
Claim 4
Dependent Claim
34 words
A method according to claim 1 wherein the liquid sample volume after introduction into said liquid carrier stream is passed with said carrier stream to an analysis system for measurement of a sample characteristic.
Claim 5
Dependent Claim
33 words
A method according to claim 3 including the additional step of adding one or more additional streams to said liquid carrier stream after introduction of said liquid sample volume into said carrier stream.
Claim 6
Independent Claim
234 words
A method for introducing a volume of liquid sample into a liquid carrier steam in a continuous liquid flow analysis system comprising the steps of: flowing a liquid carrier stream through a conduit having a common inlet through which said carrier stream and a liquid sample stream are both introduced into said conduit, a volumetric conduit portion defining a sample zone having a sample volume and a common outlet through which said carrier stream and said sample stream are both removed from said conduit; maintaining said sample stream in flow communication with both said common inlet and outlet during flow of said carrier stream therethrough, and wherein the flow of said sample stream is stopped during flow of said carrier stream through said conduit; stopping the flow of said carrier stream through said common inlet into said conduit; maintaining said carrier stream in flow communication with said volumetric conduit portion at said common inlet and outlet during flow of said sample stream therethrough; flowing said sample stream through said common inlet, volumetric conduit portion and common outlet to provide a liquid sample volume equal to said sample volume in said volumetric conduit portion wherein flowing said sample stream through said conduit is provided by pumping said sample stream into said conduit at a location upstream from said conduit and simultaneously pumping said sample stream from said conduit at a location downstream from said conduit;
Claim 7
Independent Claim
234 words
A method for introducing a volume of liquid sample into a liquid carrier steam in a continuous liquid flow analysis system comprising the steps of: flowing a liquid carrier stream through a conduit having a common inlet through which said carrier stream and a liquid sample stream are both introduced into said conduit, a volumetric conduit portion defining a sample zone having a sample volume and a common outlet through which said carrier stream and said sample stream are both removed from said conduit; maintaining said sample stream in flow communication with both said common inlet and outlet during flow of said carrier stream therethrough, and wherein the flow of said sample stream is stopped during flow of said carrier stream through said conduit; stopping the flow of said carrier stream through said common inlet into said conduit; maintaining said carrier stream in flow communication with said volumetric conduit portion at said common inlet and outlet during flow of said sample stream therethrough; flowing said sample stream through said common inlet, volumetric conduit portion and common outlet to provide a liquid sample volume equal to said sample volume in said volumetric conduit portion wherein flowing said sample stream through said conduit is provided by pumping said sample stream into said conduit at a location upstream from said conduit and simultaneously pumping said sample stream from said conduit at a location downstream from said conduit;
Claim 8
Dependent Claim
60 words
stopping the flow of said sample stream through said volumetric conduit portion and wherein stopping of said sample stream is provided by simultaneously stopping said pumping at said upstream and downstream locations; and flowing the carrier stream through said conduit to sweep said sample volume from said volumetric conduit portion to thereby introduce said sample volume into said carrier stream.
Claim 9
Dependent Claim
60 words
stopping the flow of said sample stream through said volumetric conduit portion and wherein stopping of said sample stream is provided by simultaneously stopping said pumping at said upstream and downstream locations; and flowing the carrier stream through said conduit to sweep said sample volume from said volumetric conduit portion to thereby introduce said sample volume into said carrier stream.
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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) | 1989-06-30 | 1989-12-30 | 1990-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-30 | 1993-12-30 | 1994-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-30 | 1997-12-30 | 1998-07-01 | $7700.00 | Window Closed / Lapsed |