US6461508B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for separating dirt or dust from an airflow
Assignee: Dyson Technology Ltd
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Filing: 1999-07-16
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Granted: 2002-10-08
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Expires: 2019-07-16
Abstract
Abstract The invention provides apparatus for separating dirt or dust from an airflow, comprising a collector ( 32 ) having an outer wall ( 32 a ) forming an air-rotational surface, an inner wall ( 34 a ), an airflow inlet for introducing the airflow substantially tangentially to the outer wall ( 32 a ), an airflow outlet for removing air from the collector ( 32 ), and at least one fin or baffle ( 30 ) positioned within the collector ( 32 ), characterized in that the or each fin or baffle ( 30 ) is located on the inner wall ( 34 a ) of the collector ( 32 ) and projects outwardly therefrom. The presence of the fins or baffles ( 30 ) on the inner wall ( 34 a ) discourages re-entrainment of dirt and dust particles remaining within the separation apparatus after the airflow therethrough has been discontinued.
Inventors
- 👤 Andrew Walter McRae Thomson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:50
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/16; A47L9/1616; A47L9/1625; A47L9/1633; A47L9/1683; B; B01; B01D; B01D45/00; B01D45/04; B01D45/08; B04; B04C; B04C5/00; B04C5/08; B04C5/103; B04C5/24; B04C5/26; Y; Y10; Y10S; Y10S55/00; Y10S55/03
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
113 words
A cyclonic separator for separating dirt or dust from an airflow, comprising: an outer wall, an inner wall, a collecting area located between the outer wall and the inner wall for collecting dirt or dust separated from the airflow, an airflow inlet for introducing the airflow substantially tangentially to the outer wall, an airflow outlet for removing air from the separator, the airflow inlet and the airflow outlet being spaced apart from the collecting area, and at least one first fin or baffle positioned within the separator, wherein each first fin or baffle is located at least partly in the collecting area on the inner wall and projects outwardly from the inner wall.
Claim 2
Dependent Claim
113 words
A cyclonic separator for separating dirt or dust from an airflow, comprising: an outer wall, an inner wall, a collecting area located between the outer wall and the inner wall for collecting dirt or dust separated from the airflow, an airflow inlet for introducing the airflow substantially tangentially to the outer wall, an airflow outlet for removing air from the separator, the airflow inlet and the airflow outlet being spaced apart from the collecting area, and at least one first fin or baffle positioned within the separator, wherein each first fin or baffle is located at least partly in the collecting area on the inner wall and projects outwardly from the inner wall.
Claim 3
Dependent Claim
17 words
A cyclonic separator as claimed in claim 1 , comprising a plurality of first fins or baffles.
Claim 4
Dependent Claim
18 words
A cyclonic separator as claimed in claim 2 , comprising between two and six first fins or baffles.
Claim 5
Dependent Claim
15 words
A cyclonic separator as claimed in claim 3 , comprising four first fins or baffles.
Claim 6
Dependent Claim
28 words
A cyclonic separator as claimed in claim 1 , 2 , 3 or 4 , wherein each first fin or baffle extends radially outwardly from the inner wall.
Claim 7
Dependent Claim
28 words
A cyclonic separator as claimed in claim 5 , wherein each fin or baffle has an upper edge which is inclined to a longitudinal axis of the separator.
Claim 8
Dependent Claim
32 words
A cyclonic separator as claimed in claim 5 , wherein each fin or baffle extends between one quarter and three quarters of a distance between the inner wall and the outer wall.
Claim 9
Dependent Claim
16 words
A cyclonic separator as claimed in claim 5 , wherein the outer wall is substantially cylindrical.
Claim 10
Dependent Claim
16 words
A cyclonic separator as claimed in claim 5 , wherein the inner wall is substantially cylindrical.
Claim 11
Dependent Claim
35 words
A cyclonic separator as claimed in claim 1 , 2 , 3 or 4 , wherein each first fin or baffle has an upper edge which is inclined to a longitudinal axis of the separator.
Claim 12
Dependent Claim
27 words
A cyclonic separator as claimed in claim 10 , wherein the angle of inclination of the upper edge to the longitudinal axis is between 30° and 60°.
Claim 13
Dependent Claim
27 words
A cyclonic separator as claimed in claim 11 , wherein the angle of inclination of the upper edge to the longitudinal axis is between 45° and 50°.
Claim 14
Dependent Claim
32 words
A cyclonic separator as claimed in claim 10 , wherein each fin or baffle extends between one quarter and three quarters of a distance between the inner wall and the outer wall.
Claim 15
Dependent Claim
16 words
A cyclonic separator as claimed in claim 10 , wherein the outer wall is substantially cylindrical.
Claim 16
Dependent Claim
16 words
A cyclonic separator as claimed in claim 10 , wherein the inner wall is substantially cylindrical.
Claim 17
Dependent Claim
38 words
A cyclonic separator as claimed in claim 1 , 2 , 3 or 4 , wherein each first fin or baffle extends one quarter and three quarters of a distance between the inner wall and the outer wall.
Claim 18
Dependent Claim
29 words
A cyclonic separator as claimed in claim 16 , wherein each first fin or baffle extends substantially half of the distance between the inner wall and the outer wall.
Claim 19
Dependent Claim
16 words
A cyclonic separator as claimed in claim 16 , wherein the outer wall is substantially cylindrical.
Claim 20
Dependent Claim
16 words
A cyclonic separator as claimed in claim 16 , wherein the inner wall is substantially cylindrical.
Claim 21
Dependent Claim
16 words
A cyclonic separator as claimed in claim 1 , wherein the outer wall is substantially cylindrical.
Claim 22
Dependent Claim
16 words
A cyclonic separator as claimed in claim 1 , wherein the inner wall is substantially cylindrical.
Claim 23
Dependent Claim
23 words
A cyclonic separator as claimed in claim 21 , further comprising a second cyclonic separator, of which the inner wall forms a part.
Claim 24
Dependent Claim
25 words
A cyclonic separator as claimed in claim 22 , wherein the second cyclonic separator has a higher efficiency of separation than the first cyclonic separator.
Claim 25
Dependent Claim
23 words
A cyclonic separator as claimed in claim 23 , wherein the second cyclonic separator is located substantially wholly within the first cyclonic separator.
Claim 26
Dependent Claim
23 words
A cyclonic separator as claimed in claim 22 , wherein the second cyclonic separator is located substantially wholly within the first cyclonic separator.
Claim 27
Dependent Claim
28 words
A cyclonic separator as claimed in claim 1 , further comprising additional fins or baffles provided on the outer wall radially outwardly of the first fins or baffles.
Claim 28
Dependent Claim
26 words
A cyclonic separator as claimed in claim 26 , wherein the additional fins or baffles have substantially the same shape as the first fins or baffles.
Claim 29
Dependent Claim
38 words
A cyclonic separator as claimed in claim 26 , wherein the distance between pairs of the first and additional fins or baffles is between one eighth and one half of the distance between the inner and outer walls.
Claim 30
Dependent Claim
35 words
A cyclonic separator as claimed in claim 28 , wherein the distance between pairs of the first and additional fins or baffles is substantially one quarter of the distance between the inner and outer walls.
Claim 31
Dependent Claim
17 words
A cyclonic separator as claimed in claim 1 , wherein the outer wall forms an air-rotational surface.
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) | 2005-10-07 | 2006-04-08 | 2006-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-10-07 | 2010-04-08 | 2010-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-10-07 | 2014-04-08 | 2014-10-08 | $7700.00 | Window Closed / Lapsed |