US4077886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal liquid chromatograph
Assignee: Nidec Advanced Motor Corp
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Filing: 1976-01-27
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Granted: 1978-03-07
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Expires: 1996-01-27
Abstract
Abstract A centrifugal liquid chromatograph, in which, in place of a prior art separating part in a liquid chromatograph, which portion is composed of a separating column and a feed pump, a pair of upper and lower horizontal discs are arranged vertically in spaced relation to each other, so that a separating medium may be filled in the gap defined therebetween, and the pair of discs are rotated, while a solvent as a mobile phase is being introduced through a central port provided in the upper disc into a space defined between the aforesaid pair of discs, whereby the mobile phase may make ingress into a stationary phase due to a centrifugal force, thereby achieving rapid separation of components from a sample, thus dispensing with a feed pump.
Inventors
- 👤 Tosao Fukuda
- 👤 Hiroshi Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:23
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/38; B; B01; B01D; B01D15/00; B01D15/08; B01D15/10; B01D15/18; B04; B04B; B04B5/00; B04B5/04; B04B5/0442; G01N30/90; G01N2030/381; G01N2030/903
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
221 words
A centrifugal liquid chromatograph comprising; separating means consisting of a pair of upper and lower horizontal discs which are vertically arranged in spaced-apart relationship with respect to each other, and a porous spacer disposed between said pair of discs along the circumference thereof, said separating means having a space defined between said pair of discs and filled with a separating medium, said upper disc having a central inlet port, through which a sample and a developer are to be fed to said separating means, said porous spacer consisting of a rigid core wire having a ring shape and a coil of rigid wire of a considerably small gauge wound around said rigid core wire in a spiral form at substantially a constant pitch and a tape of porous material closely adhered to the coil of rigid wire of considerably small gauge in a manner to fill the respective gaps between the adjoining wires of a considerably small gauge; a drive unit for rotating said separating means in a manner to permit adjustment of the r.p.m. thereof, and for forcing components separated from a sample towards the circumferential portion of said separating means due to centrifugal force; and detecting means for receiving the sample forced out from the outer circumferential portion of said separating means and detecting components separated from the sample.
Claim 2
Dependent Claim
221 words
A centrifugal liquid chromatograph comprising; separating means consisting of a pair of upper and lower horizontal discs which are vertically arranged in spaced-apart relationship with respect to each other, and a porous spacer disposed between said pair of discs along the circumference thereof, said separating means having a space defined between said pair of discs and filled with a separating medium, said upper disc having a central inlet port, through which a sample and a developer are to be fed to said separating means, said porous spacer consisting of a rigid core wire having a ring shape and a coil of rigid wire of a considerably small gauge wound around said rigid core wire in a spiral form at substantially a constant pitch and a tape of porous material closely adhered to the coil of rigid wire of considerably small gauge in a manner to fill the respective gaps between the adjoining wires of a considerably small gauge; a drive unit for rotating said separating means in a manner to permit adjustment of the r.p.m. thereof, and for forcing components separated from a sample towards the circumferential portion of said separating means due to centrifugal force; and detecting means for receiving the sample forced out from the outer circumferential portion of said separating means and detecting components separated from the sample.
Claim 3
Dependent Claim
65 words
A centrifugal liquid chromatograph as defined in claim 1, wherein a cylindrical wall is attached to said upper disc, said cylindrical wall projecting upwards but outwards from the circumferential portion of the central inlet port provided in said upper disc, and having an internal space serving as a reservoir for storing the developer necessary for development of the sample for a given period of time.
Claim 4
Dependent Claim
90 words
A centrifugal liquid chromatograph as defined in claim 1, wherein said separating means is removably secured through the intermediary of the lower disc thereof to a rotary shaft of said drive unit, and a truncated conical shaped liquid guide is removably secured to the outer periphery of a bearing for said rotary shaft, said conical liquid guide being located below said separating means and being adapted to receive therein the developer as well as components of the sample which are discharged from the outer circumferential portion of said separating means.
Claim 5
Dependent Claim
62 words
A centrifugal liquid chromatograph as defined in claim 3, wherein a reflector is removably mounted on the outer periphery of a bearing for said rotary shaft, said reflector having an inclined surface and being disposed above the inclined surface of said conical shaped liquid guide, with its inclined surface facing the inclined surface of the liquid guide at a small spacing therefrom.
Claim 6
Dependent Claim
94 words
A centrifugal liquid chromatograph as defined in claim 3, wherein there is provided an automatic developer supply mechanism having a developer suction pipe, said developer suction pipe having one end open in a given position on an inner diameter of a developer cylinder which is to be formed by the developer in the developer charging portion according to the rotation of said separating means, and said automatic developer supply mechanism feeding circulatively excessive developer through a developer supply line into said developer charging portion, said excessive developer being pumped up through said suction pipe.
Claim 7
Dependent Claim
58 words
A centrifugal liquid chromatograph as defined in claim 3, wherein there are provided a defoamer and a detector disposed on the downstream side of said defoamer as viewed from the separating means, said defoamer removing air bubbles contained in the developer as well as components separated from the sample which have been forced out from said separating means.
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) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |