Patent US3751992A successfully refreshed from Google Patents.
US3751992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromatography valve
Assignee: DANIEL ELECTRONICS INSTRUMENTATION
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Filing: 1971-07-07
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Granted: 1973-08-14
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Expires: 1991-07-07
Abstract
Abstract A sampling device for extracting a sample to be analyzed having a volume less than 0.01 microliter from a fluid stream by selectively introducing a slideably supported shaft into the fluid stream to expose a sample retaining capillary hole in the shaft to the fluid stream. An ultrasonic oscillator is positioned in the the fluid stream to add vibrational energy thereto to force a liquid sample into the capillary hole. The shaft is, subsequently, withdrawn from the fluid stream to deliver the fluid sample to a fluid analyzing means.
Inventors
- 👤 D Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:03
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/16; G01N30/20; G01N2030/204; G01N2030/207
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
154 words
A sampling valve comprising sample storage means having a sample storage volume of less than 0.01 microliters, means for introducing said sample storage means into a fluid stream to be analyzed, said means for introducing said sample storage means including means for slideably supporting said sample storage means and means for moving said sample storage means between a first and a second position, means for removing a sample from said sample storage volume when said sample storage means is in said second position, said means for removing a sample from said sample storage volume including a source of a carrier fluid connected to said means for slideably supporting said storage means and arranged to introduce a carrier fluid into said sample storage volume when said sample storage means is in said second position, and means for adding vibrational energy to the fluid to be analyzed to force said fluid into said sample storage volume.
Claim 2
Dependent Claim
154 words
A sampling valve comprising sample storage means having a sample storage volume of less than 0.01 microliters, means for introducing said sample storage means into a fluid stream to be analyzed, said means for introducing said sample storage means including means for slideably supporting said sample storage means and means for moving said sample storage means between a first and a second position, means for removing a sample from said sample storage volume when said sample storage means is in said second position, said means for removing a sample from said sample storage volume including a source of a carrier fluid connected to said means for slideably supporting said storage means and arranged to introduce a carrier fluid into said sample storage volume when said sample storage means is in said second position, and means for adding vibrational energy to the fluid to be analyzed to force said fluid into said sample storage volume.
Claim 3
Dependent Claim
20 words
A sampling valve as set forth in claim 1 wherein said means for adding vibrational energy is an ultrasonic transducer.
Claim 4
Dependent Claim
40 words
A sampling valve as set forth in claim 1 wherein aid means for introducing said sample storage means includes fluid sealing means arranged to isolate said sample storage volume between said first and second position of said sample storage means.
Claim 5
Dependent Claim
45 words
A sampling valve as set forth in claim 1 wherein said means for moving said sample storage means includes a fluid operating ram means and a selectively operable valve means connected to said ram means for selectively introducing an energizing fluid into said ram means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |