Patent EP0033012A2 successfully refreshed from Google Patents.
EP0033012A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A device for the automatisation of at least one operation in an injector for gas chromatographic columns
Assignee: Fisons Instruments SpA
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Filing: 1980-12-24
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Granted: —
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Expires: 2000-12-24
Abstract
Abstract The device, which can be applied to injectors for gas chromatographic columns where the substance to be analysed is introduced by means of an injection syringe, has a passage for the body of the injection syringe, aligned with the injection channel of the injector, as well as at least one detector, in said passage, of the presence of said injection syringe body, said detector acting on at least one servomechanism which actuates one or more switching valves for controlling the desired operations of the injector and/or analytical means downstream the same.
Inventors
- 👤 Giorgio Sisti
- 👤 Bruno Tosi
- 👤 Sorin Trestianu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 03:51
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/24
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
123 words
1) A device for use in connection with injectors for gas chromatographic columns where the substances to be analysed are introduced by means of an injection syringe and needle, in order to automatize at least one of operations of injector and/or analytical means downstream same at the introduction or drawing back of said syringe, wherein said device comprises a passage for the injection syringe body, aligned with the injection channel of the injector, at least one detector for detecting the presence of said syringe body in at least one point of said passage, and at least one servomechanism controlled by said detector and actuating one or more switching valves for controlling one or more operations of said injector and/or analytical means downstream same.
Claim 2
Dependent Claim
123 words
1) A device for use in connection with injectors for gas chromatographic columns where the substances to be analysed are introduced by means of an injection syringe and needle, in order to automatize at least one of operations of injector and/or analytical means downstream same at the introduction or drawing back of said syringe, wherein said device comprises a passage for the injection syringe body, aligned with the injection channel of the injector, at least one detector for detecting the presence of said syringe body in at least one point of said passage, and at least one servomechanism controlled by said detector and actuating one or more switching valves for controlling one or more operations of said injector and/or analytical means downstream same.
Claim 3
Dependent Claim
42 words
2) A device according to claim 1, and wherein inside said passage and drownstream the action position of said detector, a lock is housed to retain said syringe body, said lock being able to be set in nonworking condition by said servomechanism.
Claim 4
Dependent Claim
45 words
3) A device according to claim 2, wherein said servomechanism actuates a valve controlling the opening and closing of the injection channel of said injector, and wherein said lock is positioned at a distance from said valve higher than the lenght of said injection needle.
Claim 5
Dependent Claim
14 words
4) A device according to claim 1, wherein said detector comprises a position sensor.
Claim 6
Dependent Claim
82 words
5) A device according to claim 4, wherein said detector comprises a lever freely oscillating around an axis perpendicular to the axis of said passage, wherein said lever has a shaped appendix protruding into said passage when said lever is in its rest condition, said appendix being able to be moved to cause an oscillation of said lever due to the insertion of an iniection syringe body into said passage, and wherein said lever has an arm acting on said position sensor.
Claim 7
Dependent Claim
15 words
6) A device according to claim 4, wherein said position sensor is an optical sensor.
Claim 8
Dependent Claim
32 words
7) A device according to claim 2, wherein said servomechanism comprises a fluidodynamically actuated cylinder-piston unit, of the double-acting type or single-acting with automatic reversal type, which is controlled by said detector.
Claim 9
Dependent Claim
30 words
8) A device according to claim 7, wherein said cylinder-piston unit mechanically controls the movements of at least one switching valve, as well as of a movable syringe retaining lock.
References Cited (Backward Citations)
No citation records indexed.
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