US4994097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotational particle separator
Assignee: Romico B B BVIO
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Filing: 1989-09-27
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Granted: 1991-02-19
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Expires: 2009-09-27
Abstract
Abstract A rotational separator for separating particulate material from gas includes a housing having a gas inlet, a gas outlet, and an outlet for separated particulate material; a centrifuge mounted for rotation in the housing and including separation channels which extend parallel to a common rotation axis; and a driver for rotating the centrifuge; wherein the particulate material separated has a cross-sectional dimension from about 0.1 to about 5 um, that the separation channels are provided with singly-connected cross-sections over a substantial part of the axial separation channel length, and that the hydraulic diameter of the separation channels and the average axial gas velocity are selected in mutual dependence such that the Reynolds number is less than 2400 and the gas passes through the separation channels in a laminar flow.
Inventors
- 👤 Jozef J. H. Brouwers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:21
CPC Classifications
B; B04; B04C; B04C9/00; B01; B01D; B01D45/00; B01D45/12; B01D45/14; B04C5/00; B04C5/12; B04C5/13; B04C2009/004; B04C2009/007
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
134 words
A rotational particle separator for separating particulate material having cross-sectional dimensions from about 0.1 micron to about 5 microns from a gas, said separator comprising: a housing having a gas inlet, a gas outlet and an outlet for separated particulate material; a centrifuge rotatably mounted in said housing along a rotation axis extending through said housing, said centrifuge including a plurality of radially-spaced individual separation channels which extend parallel to each other and parallel to said rotation axis, each of said separation channels having a cross-section along substantially the entire length thereof which extends azimuthally about said rotation axis by less than 360° to prevent azimuthal flows greater than 360° about said rotation axis in any of said individual separation channels; and means for rotating said centrifuge within said housing about said rotation axis.
Claim 2
Dependent Claim
134 words
A rotational particle separator for separating particulate material having cross-sectional dimensions from about 0.1 micron to about 5 microns from a gas, said separator comprising: a housing having a gas inlet, a gas outlet and an outlet for separated particulate material; a centrifuge rotatably mounted in said housing along a rotation axis extending through said housing, said centrifuge including a plurality of radially-spaced individual separation channels which extend parallel to each other and parallel to said rotation axis, each of said separation channels having a cross-section along substantially the entire length thereof which extends azimuthally about said rotation axis by less than 360° to prevent azimuthal flows greater than 360° about said rotation axis in any of said individual separation channels; and means for rotating said centrifuge within said housing about said rotation axis.
Claim 3
Dependent Claim
152 words
A rotational particle separator for separating particulate material having cross-sectional dimensions from about 0.1 micron to about 5 microns from a gas, said separator comprising: a housing having a gas inlet, a gas outlet and an outlet for separated particulate material; a centrifuge rotatably mounted in said housing along a rotation axis extending through said housing, said centrifuge including a plurality of radially-spaced individual separation channels which extend parallel to each other and parallel to said rotation axis, each of said separation channels extending azimuthally about said rotation axis by less than 360° to prevent azimuthal flows greater than 360° about said rotation axis in any of said individual separation channels, and each of said separation channels having boundary walls along substantially the entire length thereof bounding the separation in radial and azimuthal directions relative to the rotation axis; and means for rotating said centrifuge within said housing about said rotation axis.
Claim 4
Dependent Claim
152 words
A rotational particle separator for separating particulate material having cross-sectional dimensions from about 0.1 micron to about 5 microns from a gas, said separator comprising: a housing having a gas inlet, a gas outlet and an outlet for separated particulate material; a centrifuge rotatably mounted in said housing along a rotation axis extending through said housing, said centrifuge including a plurality of radially-spaced individual separation channels which extend parallel to each other and parallel to said rotation axis, each of said separation channels extending azimuthally about said rotation axis by less than 360° to prevent azimuthal flows greater than 360° about said rotation axis in any of said individual separation channels, and each of said separation channels having boundary walls along substantially the entire length thereof bounding the separation in radial and azimuthal directions relative to the rotation axis; and means for rotating said centrifuge within said housing about said rotation axis.
Claim 5
Dependent Claim
141 words
A rotational particle separator for separating particulate material having cross-sectional dimensions from about 0.1 micron to about 5 microns from a gas, said separator comprising: a housing having a gas inlet, a gas outlet and an outlet for separated particulate material; a centrifuge rotatably mounted in said housing along a rotation axis extending through said housing, said centrifuge including a plurality of radially-spaced individual separation channels which extend parallel to each other and parallel to said rotation axis, each of said separation channels extending azimuthally about said rotation axis by less than 360° to prevent azimuthal flows greater than 360° about said rotation axis in any of said individual separation channels, and each of said separation channels enclosed along substantially the entire length thereof by a single wall; and means for rotating said centrifuge within said housing about said rotation axis.
Claim 6
Dependent Claim
141 words
A rotational particle separator for separating particulate material having cross-sectional dimensions from about 0.1 micron to about 5 microns from a gas, said separator comprising: a housing having a gas inlet, a gas outlet and an outlet for separated particulate material; a centrifuge rotatably mounted in said housing along a rotation axis extending through said housing, said centrifuge including a plurality of radially-spaced individual separation channels which extend parallel to each other and parallel to said rotation axis, each of said separation channels extending azimuthally about said rotation axis by less than 360° to prevent azimuthal flows greater than 360° about said rotation axis in any of said individual separation channels, and each of said separation channels enclosed along substantially the entire length thereof by a single wall; and means for rotating said centrifuge within said housing about said rotation axis.
Claim 7
Dependent Claim
39 words
The rotational particle separator of claims 1, 2 or 3 further including rotary means installed upstream of the separation channels for controlling the division of gas flow over the separation channels and for preventing internal circulations in the centrifuge.
Claim 8
Dependent Claim
38 words
The rotational particle separator of claims 1, 2 or 3 further including rotary means installed downstream of the separation channels for controlling the division of gas over the separation channels and for preventing internal circulations in the centrifuge.
Claim 9
Dependent Claim
69 words
The rotational particle separator of claims 1, 2 or 3 further including upstream rotary means installed upstream of the separation channels for controlling the division of gas flow over the separation channels and for preventing internal circulation in the centrifuge, and including downstream rotary means installed downstream of the separation channels for controlling the division of gas over the separation channels and for preventing internal circulation in the centrifuge.
Claim 10
Dependent Claim
18 words
The rotational particle separator of claims 1, 2 or 3 wherein said separation channels have circular cross sections.
Claim 11
Dependent Claim
20 words
The rotational particle separator of claims 1, 2 or 3 wherein said separation channels have a generally rectangular cross section.
Claim 12
Dependent Claim
22 words
The rotational particle separator of claims 1, 2 or 3 wherein said centrifuge includes at least one hundred of said separation channels.
Claim 13
Dependent Claim
43 words
The rotational particle separator of claims 1, 2 or 3 wherein said centrifuge includes a cylindrical body having an upstream end and a downstream end and said separation channels extend within said cylindrical body from said upstream end to said downstream end thereof.
Claim 14
Dependent Claim
43 words
The rotational particle separator of claims 1, 2 or 3 wherein said centrifuge includes at least ten narrowly spaced, concentric cylinders which are separated by respective annuluses and includes at least one azimuthally-placed, axially-extending partition in each annulus to define said separation channels.
Claim 15
Dependent Claim
24 words
The rotational particle separator of claims 1, 2 or 3 wherein the separation channels include at least one hundred channels having a circular cross-section.
Claim 16
Dependent Claim
26 words
The rotational particle separator of claims 1, 2 or 3 wherein the separation channels are formed by at least one hundred channels having a non-circular cross-section.
Claim 17
Dependent Claim
27 words
The rotational particle separator of claims 1, 2 or 3 wherein the separation channels are formed by at least one hundred channels perforated in a massive cylinder.
Claim 18
Dependent Claim
36 words
The rotational particle separator of claims 1, 2 or 3 wherein the downstream end of a separation channel extends axially beyond the downstream end of separation channels arranged at a larger radius of the rotational axis.
Claim 19
Dependent Claim
20 words
The rotational particle separator of claims 1, 2 or 3 further including a pre-separator installed upstream from the separation channels.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-02-18 | 1994-08-20 | 1995-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-18 | 1998-08-20 | 1999-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-18 | 2002-08-20 | 2003-02-19 | $7700.00 | Window Closed / Lapsed |