US4430216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed preparative countercurrent chromatography with a multiple layer coiled column
Assignee: United States Department of Health and Human Services
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Filing: 1982-09-09
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Granted: 1984-02-07
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Expires: 2002-09-09
Abstract
Abstract A horizontal flow-through apparatus for two-phase countercurrent chromatography consisting of a horizontal multi-layer helically coiled column carried on a flanged reel which is rotated about its own axis and simultaneously revolved around a stationary central parallel horizontal pipe at the same angular velocity and in the same direction to prevent twisting of its inlet and outlet flow tubes, which extend through the stationary central pipe. The multi-layer array can retain a large volume of the stationary phase against a high flow rate of the mobile phase, enabling the separation of the sample components to be completed in a relatively short period of time.
Inventors
- 👤 Yoichiro Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:35
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/38; G01N30/42; B; B01; B01D; B01D11/00; B01D11/04; B01D11/0476; B01D11/048
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
97 words
An apparatus for continuous countercurrent chromatography comprising a support, helical separation column means including means to retain a large volume of stationary phase comprising a multi-layer helically coiled column rotatably mounted on the support on a first axis, inlet and outlet flow tubes connected to the terminal ends of said multi-layer coiled column, and means to simultaneously rotate said multi-layer coiled column around said first axis and revolve it around a second axis spaced from and being parallel to said first axis, whereby to simultaneously develop both force reversals and centrifugal forces in said multi-layer coiled column.
Claim 2
Independent Claim
97 words
An apparatus for continuous countercurrent chromatography comprising a support, helical separation column means including means to retain a large volume of stationary phase comprising a multi-layer helically coiled column rotatably mounted on the support on a first axis, inlet and outlet flow tubes connected to the terminal ends of said multi-layer coiled column, and means to simultaneously rotate said multi-layer coiled column around said first axis and revolve it around a second axis spaced from and being parallel to said first axis, whereby to simultaneously develop both force reversals and centrifugal forces in said multi-layer coiled column.
Claim 3
Dependent Claim
20 words
The apparatus of claim 1, wherein said coiled column is mounted horizontally with said first and second axes being horizontal.
Claim 4
Dependent Claim
30 words
The apparatus of claim 2, and fixed elongated tubular guide means extending along said second axis and receiving said flow tubes and defining a protective housing for said flow tubes.
Claim 5
Dependent Claim
37 words
The apparatus of claim 3, and means to simultaneously rotate said multi-layer coiled column around said first axis and revolve said multi-layer coiled column around said second axis at relative rates avoiding twisting of said flow tubes.
Claim 6
Dependent Claim
59 words
The apparatus of claim 2, and wherein said support includes spaced parallel bar members mounted for rotation around said second axis, means rotatably mounting said multi-layer coiled column on said first axis between end portions of said bar members, and counterweight means connected to opposite end portions of said bar members substantially symmetrically relative to said helically coiled column.
Claim 7
Dependent Claim
33 words
The apparatus of claim 5, and wherein said means rotatably mounting said multi-layer coiled column includes detachable bearing retention means rotatably securing said coiled column to the outer ends of said bar members.
Claim 8
Dependent Claim
56 words
The apparatus of claim 2, and wherein said support includes a pair of spaced parallel bar members mounted for rotation around said second axis, and wherein said multi-layer coiled column comprises a supporting reel with the multi-layer column helically wound thereon, said reel having an axial shaft journalled between end portions of said parallel bar members.
Claim 9
Dependent Claim
27 words
The apparatus of claim 7, and counterweight means connected between the opposite end portions of said spaced parallel bar members substantially symmetrically relative to said supporting reel.
Claim 10
Dependent Claim
22 words
The apparatus of claim 7, and fixed elongated tubular guide means extending along said second axis and protectively receiving said flow tubes.
Claim 11
Dependent Claim
73 words
The apparatus of claim 7, and fixed elongated tubular guide means extending along said second axis and protectively receiving said flow tubes, and wherein said means to simultaneously rotate said multi-layer coiled column and revove it comprises a fixed sun gear on said tubular guide means and a planet gear on said reel shaft meshing with said fixed sun gear, and drive means to rotate said parallel bar members around said second axis.
Claim 12
Dependent Claim
23 words
The apparatus of claim 10, and wherein said planet gear and sun gear are identical, whereby to avoid twisting of said flow tubes.
Claim 13
Dependent Claim
18 words
The apparatus of claim 10, and wherein said bar members are journalled on said fixed tubular guide means.
Claim 14
Dependent Claim
24 words
The apparatus of claim 12, and counterweight means mounted between the end portions of said bar members substantially symmetrically opposite to said supporting reel.
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) | 1987-02-06 | 1987-08-08 | 1988-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-06 | 1991-08-08 | 1992-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-06 | 1995-08-08 | 1996-02-07 | $7700.00 | Window Closed / Lapsed |