US6425931B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclonic separation apparatus
Assignee: Dyson Technology Ltd
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Filing: 1999-03-22
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Granted: 2002-07-30
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Expires: 2019-03-22
Abstract
Abstract The invention provides cyclonic separation apparatus containing a cyclone body having at least one fluid inlet and a fluid outlet, the fluid outlet being concentric with the longitudinal axis of the cyclone body. The cyclonic separation apparatus also contains a vortex finder projecting from an end surface of the cyclone body into the interior of the cyclonic separator, and a centerbody located partially within the vortex finder. The centerbody projects beyond the distal edge of the vortex finder so that the distance between the end surface of the cyclone body and the further end of the centerbody is at least twice the smallest diameter of the vortex finder, and the cross-sectional area of the centerbody is circular at any point along its length.
Inventors
- 👤 James Hugh Croggon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:54
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/0081; A47L9/10; A47L9/16; A47L9/1616; A47L9/1625; A47L9/1633; A47L9/1658; B; B04; B04C; B04C11/00; B04C5/00; B04C5/12; B04C5/13; B04C2005/136; Y; Y10; Y10S; Y10S55/00; Y10S55/03
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
129 words
A cyclonic separation apparatus comprising a cyclone body having at least one fluid inlet and a fluid outlet, the fluid outlet being concentric with a longitudinal axis of the cyclone body and comprising a vortex finder projecting from an end surface of the cyclone body into the interior thereof, and a centerbody located partially within the vortex finder and projecting beyond the end thereof opposite the end surface so that the distance between the end surface of the cyclone body and the furthermost end of the centerbody is at least twice the smallest diameter of the vortex finder, the cross-sectional area of the centerbody being circular at any point along its length, wherein the centerbody tapers inwardly towards its furthermost end and is hemispherical, conical or frusto-conical in shape.
Claim 2
Dependent Claim
129 words
A cyclonic separation apparatus comprising a cyclone body having at least one fluid inlet and a fluid outlet, the fluid outlet being concentric with a longitudinal axis of the cyclone body and comprising a vortex finder projecting from an end surface of the cyclone body into the interior thereof, and a centerbody located partially within the vortex finder and projecting beyond the end thereof opposite the end surface so that the distance between the end surface of the cyclone body and the furthermost end of the centerbody is at least twice the smallest diameter of the vortex finder, the cross-sectional area of the centerbody being circular at any point along its length, wherein the centerbody tapers inwardly towards its furthermost end and is hemispherical, conical or frusto-conical in shape.
Claim 3
Dependent Claim
40 words
A cyclonic separation apparatus as claimed in claim 1 , wherein the distance between the end surface of the cyclone body and the furthermost end of the centerbody is at least 2.3 times the smallest diameter of the vortex finder.
Claim 4
Dependent Claim
40 words
A cyclonic separation apparatus as claimed in claim 2 , wherein the distance between the end surface of the cyclone body and the furthermost end of the centerbody is at least 2.5 times the smallest diameter of the vortex finder.
Claim 5
Dependent Claim
22 words
A cyclonic separation apparatus as claimed in claim 1 , wherein the centerbody is generally cylindrical with at least one hemispherical end.
Claim 6
Dependent Claim
22 words
A cyclonic separation apparatus as claimed in claim 1 ; wherein the centerbody is generally cylindrical with at least one conical end.
Claim 7
Dependent Claim
30 words
A cyclonic separation apparatus as claimed in claim 1 , wherein the diameter of the centerbody is no more than one half of the smallest diameter of the vortex finder.
Claim 8
Dependent Claim
30 words
A cyclonic separation apparatus as claimed in claim 6 , wherein the diameter of the centerbody is no more than one third of the smallest diameter of the vortex finder.
Claim 9
Dependent Claim
32 words
A cyclonic separation apparatus as claimed in claim 7 , wherein the smallest diameter of the vortex finder is about 32 mm and the diameter of the centerbody is about 6 mm.
Claim 10
Dependent Claim
35 words
A cyclonic separation apparatus as claimed in claim 8 , wherein the distance of the furthermost end of the centerbody is between 80 mm and 110 mm from the end surface of the cyclone body.
Claim 11
Dependent Claim
35 words
A cyclonic separation apparatus as claimed in claim 9 , wherein the distance of the furthermost end of the centerbody is between 85 mm and 95 mm from the end surface of the cyclone body.
Claim 12
Dependent Claim
32 words
A cyclonic separation apparatus as claimed in claim 7 , wherein the smallest diameter of the vortex finder is about 30 mm and the diameter of the centerbody is about 10 mm.
Claim 13
Dependent Claim
35 words
A cyclonic separation apparatus as claimed in claim 11 , wherein the distance of the furthermost end of the centerbody is between 50 mm and 90 mm from the end surface of the cyclone body.
Claim 14
Dependent Claim
35 words
A cyclonic separation apparatus as claimed in claim 12 , wherein the distance of the furthermost end of the centerbody is between 60 mm and 70 mm from the end surface of the cyclone body.
Claim 15
Dependent Claim
30 words
A cyclonic separation apparatus as claimed in claim 1 , wherein the centerbody projects beyond a lower edge of the vortex finder to a distance of at least 10 mm.
Claim 16
Dependent Claim
29 words
A cyclonic separation apparatus as claimed in claim 14 , wherein the centerbody projects beyond the lower edge of the vortex finder to a distance of about 14.4 mm.
Claim 17
Dependent Claim
29 words
A cyclonic separation apparatus as claimed in claim 14 , wherein the centerbody projects beyond the lower edge of the vortex finder to a distance of about 16.5 mm.
Claim 18
Dependent Claim
33 words
A cyclonic separation apparatus as claimed in claim 1 , wherein the centerbody is supported in the vortex finder by supporting tabs extending as far as an interior wall of the vortex finder.
Claim 19
Dependent Claim
16 words
A cyclonic separation apparatus as claimed in claim 17 , wherein the tabs are diametrically opposed.
Claim 20
Dependent Claim
16 words
A cyclonic separation apparatus as claimed in claim 17 , wherein the tabs comprise helical vanes.
Claim 21
Dependent Claim
34 words
A cyclonic separation apparatus as claimed in claim 17 , wherein the tabs and the interior wall of the vortex finder incorporate retaining means for retaining the centerbody in position inside the vortex finder.
Claim 22
Dependent Claim
21 words
A cyclonic separation apparatus as claimed in claim 20 , wherein the retaining means comprises resilient tongues engageable with corresponding grooves.
Claim 23
Dependent Claim
133 words
A vacuum cleaner incorporating a cyclonic separation apparatus comprising a cyclone body having at least one fluid inlet and a fluid outlet, the fluid outlet being concentric with a longitudinal axis of the cyclone body and comprising a vortex finder projecting from an end surface of the cyclone body into the interior thereof, and a centerbody located partially within the vortex finder and projecting beyond the end thereof opposite the end surface so that the distance between the end surface of the cyclone body and the furthermost end of the centerbody is at least twice the smallest diameter of the vortex finder, the cross-sectional area of the centerbody being circular at any point along its length, wherein the centerbody tapers inwardly towards its furthermost end and is hemispherical, conical or frusto-conical in shape.
Claim 24
Dependent Claim
133 words
A vacuum cleaner incorporating a cyclonic separation apparatus comprising a cyclone body having at least one fluid inlet and a fluid outlet, the fluid outlet being concentric with a longitudinal axis of the cyclone body and comprising a vortex finder projecting from an end surface of the cyclone body into the interior thereof, and a centerbody located partially within the vortex finder and projecting beyond the end thereof opposite the end surface so that the distance between the end surface of the cyclone body and the furthermost end of the centerbody is at least twice the smallest diameter of the vortex finder, the cross-sectional area of the centerbody being circular at any point along its length, wherein the centerbody tapers inwardly towards its furthermost end and is hemispherical, conical or frusto-conical in shape.
References Cited (Backward Citations)
CH388267A
Cited
US4278452A
Cited
GB2084904A
Cited
US4810264A
Cited
WO1991006750A1
Cited
US5444982A
Cited
WO1997012660A1
Cited
WO1997046323A1
Cited
US6024874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-07-29 | 2006-01-28 | 2006-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-07-29 | 2010-01-28 | 2010-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-07-29 | 2014-01-28 | 2014-07-30 | $7700.00 | Window Closed / Lapsed |