EP0035395A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Channel for sedimentation field flow fractionation
Assignee: EIDP Inc
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Filing: 1981-02-27
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Granted: —
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Expires: 2001-02-27
Abstract
Abstract A long, thin annular belt-like channel is designed for use in sedimentation field flow fractionation. The channel has a generally rectangular cross-section and a width to thickness aspect ratio (B to w) lying in the range of 3-50 to 1. The channel may be formed of a flattened capillary tube. The ratio of the thickness of the channel to the characteristic height of the particles to be separated (w to 1) is greater than 5 to 1.
Inventors
- 👤 Charles Heritage Dilks, Jr.
- 👤 Wallace Wen-Chuan Yau
- 👤 Joseph Jack Kirkland
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 05:53
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/04; B04B5/0442; B03; B03B; B03B5/00; B04B2005/045
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
96 words
Apparatus for separating particulates suspended in a fluid medium according to their effective masses, said apparatus having an annular cylindrical channel with a cylinder axis, said channel being sufficiently thin in the radial dimension to effect laminar flow therein, means for rotating said channel about said axis, means for passing said fluid medium circumferentially through said channel, and means for introducing said particulates into said medium for passaqe through said channel, wherein said channel is generally rectangular in cross-section and has a width to thickness aspect ratio lying in the range 3 - 50 to 1.
Claim 2
Dependent Claim
96 words
Apparatus for separating particulates suspended in a fluid medium according to their effective masses, said apparatus having an annular cylindrical channel with a cylinder axis, said channel being sufficiently thin in the radial dimension to effect laminar flow therein, means for rotating said channel about said axis, means for passing said fluid medium circumferentially through said channel, and means for introducing said particulates into said medium for passaqe through said channel, wherein said channel is generally rectangular in cross-section and has a width to thickness aspect ratio lying in the range 3 - 50 to 1.
Claim 3
Dependent Claim
20 words
Apparatus as claimed in claim 1 wherein said aspect ratio lies in the range of 3 - 20 to 1.
Claim 4
Dependent Claim
16 words
Apparatus according to any preceding claim wherein said channel is formed of a flattened capillary tube.
Claim 5
Dependent Claim
17 words
Apparatus as claimed in claim 3 wherein the rectangular cross-section of said channel has rounded end sections.
Claim 6
Dependent Claim
32 words
Apparatus as claimed in any preceding claim wherein the ratio of the thickness of said channel to the characteristic height of the particulates to be separated is greater than 5 to 1.
References Cited (Backward Citations)
No citation records indexed.
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