US4577515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sampling valve for use in high-speed liquid chromatography
Assignee: Tokyo Rikakikai Co Ltd
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Filing: 1984-06-19
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Granted: 1986-03-25
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Expires: 2004-06-19
Abstract
Abstract A sampling valve for use in high-speed liquid chromatography comprising a first stator having therein a sample injection flow passage and a solution flow passage, a second stator (B; G; J) having therein solution flow passages and a discharge passage, and a rotor having therein three or more sample holding bores of different diameter, said rotor being rotatably interposed between said first and second stators.
Inventors
- 👤 Noboru Someya
- 👤 Rikizo Horikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:59
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/10; G01N35/1095; G01N35/1097; G01N30/00; G01N30/02; G01N30/04; G01N30/16; G01N30/20; G01N30/22
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
142 words
A sampling valve for use in a high-speed liquid chromatography comprising a first stator having therein a sample injection flow passage and a solution flow passage; a second stator having therein a solution flow passage and a discharge passage; a rotor having therein three or more sample holding bores of different diameter, said rotor being rotatably interposed between said first and second stators; and an axial shaft fixed between said stators, said axial shaft extending through said rotor in such a manner as to allow said rotor to rotate; either one of said stators or said shaft being provided with a length of engaging groove adapted to engage with a front end of a lever for rotating said rotor; a plurality of mounting holes being provided in such a positions as to permit the adjustment of the angular position of said rotor.
Claim 2
Dependent Claim
142 words
A sampling valve for use in a high-speed liquid chromatography comprising a first stator having therein a sample injection flow passage and a solution flow passage; a second stator having therein a solution flow passage and a discharge passage; a rotor having therein three or more sample holding bores of different diameter, said rotor being rotatably interposed between said first and second stators; and an axial shaft fixed between said stators, said axial shaft extending through said rotor in such a manner as to allow said rotor to rotate; either one of said stators or said shaft being provided with a length of engaging groove adapted to engage with a front end of a lever for rotating said rotor; a plurality of mounting holes being provided in such a positions as to permit the adjustment of the angular position of said rotor.
Claim 3
Dependent Claim
87 words
A sampling valve for use in high-speed liquid chromatography as claimed in claim 1, in which said stators are fixed with each other by means of a tubular member in which said rotor is rotatably housed; said rotor is provided in the periphery thereof with mounting holes which correspond each to one of said sample holding bores and which is capable of engaging with a rotating lever; said tubular member is provided with a slot for limiting the displacement of said rotating lever in the circumferential direction.
References Cited (Backward Citations)
US2973117A
Cited
US4476731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-24 | 1989-09-23 | 1990-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-24 | 1993-09-23 | 1994-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-24 | 1997-09-23 | 1998-03-25 | $7700.00 | Window Closed / Lapsed |