US4501161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Autosampler
Assignee: RIKEN
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Filing: 1983-01-20
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Granted: 1985-02-26
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Expires: 2003-01-20
Abstract
Abstract This invention relates to an apparatus for automatically sampling a clarified test solution from a suspension to be tested, which comprises two filtering tubes being immersed in the suspension, a circulator connected to the one tube, and a sampling cell connected to the circulator and the other tube. The suspension is sucked by the circulator and filtered through the one tube. The filtered and clarified test solution is sampled in the sampling cell and the residual test solution is returned to the suspension through the other tube. A flow direction of the test solution is reversed at intervals so that the filtering tubes are not blocked by suspending solids.
Inventors
- 👤 Isao Endo
- 👤 Teruyuki Nagamune
- 👤 Ichiro Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:27
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/10; G01N1/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
145 words
An autosampler for sampling a clarified test solution from a suspension to be tested, which comprises two filtering tubes which are adapted to be immersed in the suspension, a circulator connected in series with one filtering tube, a sampling cell for sampling test solution, and the other filtering tube, the sampling cell being connected between the circulator and the other filtering tube, the circulator being operable to draw a test solution from the one filtering tube, whereby the test solution is filtered and clarified, to deliver the filtered and clarified test solution to the sampling cell, whereby the test solution is sampled, and to return the residual test solution from the sampling cell to the suspension through the other filtering tube, and said circulator being operable to periodically reverse the flow direction of the test solution so that the filtering tubes do not become blocked.
Claim 2
Dependent Claim
145 words
An autosampler for sampling a clarified test solution from a suspension to be tested, which comprises two filtering tubes which are adapted to be immersed in the suspension, a circulator connected in series with one filtering tube, a sampling cell for sampling test solution, and the other filtering tube, the sampling cell being connected between the circulator and the other filtering tube, the circulator being operable to draw a test solution from the one filtering tube, whereby the test solution is filtered and clarified, to deliver the filtered and clarified test solution to the sampling cell, whereby the test solution is sampled, and to return the residual test solution from the sampling cell to the suspension through the other filtering tube, and said circulator being operable to periodically reverse the flow direction of the test solution so that the filtering tubes do not become blocked.
Claim 3
Dependent Claim
20 words
The autosampler as defined in claim 1, wherein a pressure indicator is provided between the circulator and each filtering tube.
Claim 4
Dependent Claim
17 words
The autosampler as defined in claim 1, wherein the suspension is a culture broth of a microorganism.
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) | 1988-02-26 | 1988-08-27 | 1989-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-26 | 1992-08-27 | 1993-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-26 | 1996-08-27 | 1997-02-26 | $7700.00 | Window Closed / Lapsed |