US3915677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injector and septum for gas chromatographic apparatus and other equipment
Assignee: Individual
•
Filing: 1973-06-29
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Granted: 1975-10-28
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Expires: 1993-06-29
Abstract
Abstract An injector arrangement in which an injector chamber is provided with at least two septa. The injector is for gas chromatographic apparatus and other equipment where a sample is to be introduced through a hollow needle which is pushed through a septum. The two or more septa are arranged in relative positions so that the hollow needle first penetrates one septum whereby the tip of the needle enters the interior of the injector chamber. Thereafter, the needle is forced through a second septum whereupon the tip of the needle appears on the outside of the chamber, where the needle can be cleaned. After the cleaning action, the needle is retracted so that the tip is returned to the interior of the injector chamber where the injection process can then proceed.
Inventors
- 👤 Asbjorn Oppegaard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:34
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/16; G01N30/18; B; B01; B01D; B01D15/00; B01D15/08; B01D15/10; B01D15/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
108 words
AN INJECTOR ARRANGEMENT FOR INTRODUCING SAMPLES INTO PHYSICAL-CHEMICAL INVESTIGATION APPARATUS BY MEANS OF A SYRINGE, COMPRISING IN COMBINATION: AN INJECTOR BLOCK, A ROTATION SUPPORT MOUNTED ON SAID INJECTOR BLOCK AND ADAPTED TO RECEIVE A SYRINGE, AN ANNULAR SEAL BETWEEN SAID ROTATING SUPPORT AND SAID INJECTOR BLOCK, A FIRST CHANNEL EXTENDING THROUGH SAID ROTATING SUPPORT AND HAVING AN OPENING WITHIN SAID ANNULAR SEAL, A FIRST SEPTUM CLOSING SAID FIRST CHANNEL, A SECOND CHANNEL EXTENDING THROUGH SAID INJECTOR BLOCK AAND HAVING AN OPENING WITNIN SAID ANNULAR SEAL, A SECOND SEPTUM CLOSING SAID SECOND CHANNEL, A TIRD CHANNEL EXTENDING INTO SAID INJECTOR BLOCK AND HAVING AN OPENING WITHIN SAID ANNULAR SEAL,
Claim 2
Dependent Claim
108 words
AN INJECTOR ARRANGEMENT FOR INTRODUCING SAMPLES INTO PHYSICAL-CHEMICAL INVESTIGATION APPARATUS BY MEANS OF A SYRINGE, COMPRISING IN COMBINATION: AN INJECTOR BLOCK, A ROTATION SUPPORT MOUNTED ON SAID INJECTOR BLOCK AND ADAPTED TO RECEIVE A SYRINGE, AN ANNULAR SEAL BETWEEN SAID ROTATING SUPPORT AND SAID INJECTOR BLOCK, A FIRST CHANNEL EXTENDING THROUGH SAID ROTATING SUPPORT AND HAVING AN OPENING WITHIN SAID ANNULAR SEAL, A FIRST SEPTUM CLOSING SAID FIRST CHANNEL, A SECOND CHANNEL EXTENDING THROUGH SAID INJECTOR BLOCK AAND HAVING AN OPENING WITNIN SAID ANNULAR SEAL, A SECOND SEPTUM CLOSING SAID SECOND CHANNEL, A TIRD CHANNEL EXTENDING INTO SAID INJECTOR BLOCK AND HAVING AN OPENING WITHIN SAID ANNULAR SEAL,
Claim 3
Dependent Claim
24 words
The arrangement as defined in claim 1 wherein said septa are self-sealing for maintaining a seal around said needle after penetration of said septa.
Claim 4
Dependent Claim
32 words
An injector arrangement according to claim 1, in which said first, second and third channels are arranged with an inclination at approximately the same angle with respect to said axis of rotation.
Claim 5
Dependent Claim
29 words
An injector arrangement according to claim 1, in which at least one of said septa is located at an end of its associated channel remote from said annular seal.
Claim 6
Dependent Claim
19 words
The injector arrangement as defined in claim 1 including gas chromatographic apparatus communicating and cooperating with said third channel.
Claim 7
Dependent Claim
20 words
The injector arrangement as defined in claim 1 including a syringe connected to said needle and filled with said sample.
References Cited (Backward Citations)
US2584397A
Cited
US3205711A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |