Patent US5853440A successfully refreshed from Google Patents.
US5853440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shroud and cyclonic cleaning apparatus incorporating same
Assignee: Dyson Technology Ltd
•
Filing: 1995-12-27
•
Granted: 1998-12-29
•
Expires: 2015-12-27
Abstract
Abstract The invention provides a shroud (10; 40) for use in apparatus incorporating cyclonic dust separation structure for separating dirt and dust from an airflow, the shroud (10; 40) including a perforated portion (14; 44) having a multiplicity of perforations (30; 46) for allowing the airflow to pass therethrough. According to invention, the perforated portion (14) has a lower edge (16) and a lip (18) depending therefrom, the lip (18) including a parallel-sided portion (34) having an inclined distal end and a step (38) formed radially inwardly of the parallel-sided portion (34) and at the proximal end thereof. The invention improves performance of the dust separation apparatus in conjunction with which the shroud (10; 40) is utilized.
Inventors
- 👤 James Dyson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:06
CPC Classifications
B; B04; B04C; B04C5/00; B04C5/08; B04C5/10; A; A47; A47L; A47L9/00; A47L9/10; A47L9/16; A47L9/1616; A47L9/1625; A47L9/1633; B04C11/00; B04C5/24; B04C5/26; Y; Y10; Y10S; Y10S55/00; Y10S55/03
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
62 words
A shroud for use in apparatus incorporating cyclonic dust separation means for separating dirt and dust from an airflow, the shroud comprising a perforated portion having a lower edge and a lip depending therefrom, the lip comprising a parallel-sided portion having an inclined distal end, wherein a step is formed radially inwardly of the parallel-sided portion and at the proximal end thereof.
Claim 2
Dependent Claim
62 words
A shroud for use in apparatus incorporating cyclonic dust separation means for separating dirt and dust from an airflow, the shroud comprising a perforated portion having a lower edge and a lip depending therefrom, the lip comprising a parallel-sided portion having an inclined distal end, wherein a step is formed radially inwardly of the parallel-sided portion and at the proximal end thereof.
Claim 3
Dependent Claim
23 words
A shroud as claimed in claim 1, wherein the breadth of the step is substantially equal to the breadth of the parallel-sided portion.
Claim 4
Dependent Claim
22 words
A shroud as claimed in claim 1 or 2, wherein the height of the step is substantially equal to the breadth thereof.
Claim 5
Dependent Claim
23 words
A shroud as claimed in any one of claims 1 or 2 wherein the breadth of the parallel-sided portion is substantially 2 mm.
Claim 6
Dependent Claim
26 words
A shroud as claimed in any one of claims 1 or 2 wherein the parallel-sided portion extends substantially parallel to the longitudinal axis of the shroud.
Claim 7
Dependent Claim
27 words
A shroud as claimed in any one of claims 1 or 2 wherein the lip extends substantially 15 mm below the lower edge of the perforated portion.
Claim 8
Dependent Claim
34 words
A shroud as claimed in any one of claims 1 or 2 wherein the distal end of the lip is inclined at an angle of substantially 45° to the parallel sides of the lip.
Claim 9
Dependent Claim
18 words
A shroud as claimed in any one of claims 1 or 2 wherein the perforated portion is cylindrical.
Claim 10
Dependent Claim
37 words
Apparatus as claimed in claim 1 wherein the cyclonic dust separation means comprise a low efficiency cyclone and a high efficiency cyclone positioned downstream of the low efficiency cyclone, the shroud being positioned between the two cyclones.
Claim 11
Dependent Claim
14 words
Apparatus as claimed in claim 9 wherein the apparatus consists of a vacuum cleaner.
Claim 12
Dependent Claim
21 words
A shroud as claimed in claim 3 wherein the parallel-sided portion extends substantially parallel to the longitudinal axis of the shroud.
Claim 13
Dependent Claim
21 words
A shroud as claimed in claim 4 wherein the parallel-sided portion extends substantially parallel to the longitudinal axis of the shroud.
Claim 14
Dependent Claim
13 words
A shroud as claimed in claim 3 wherein the perforated portion is cylindrical.
Claim 15
Dependent Claim
13 words
A shroud as claimed in claim 4 wherein the perforated portion is cylindrical.
Claim 16
Dependent Claim
13 words
A shroud as claimed in claim 5 wherein the perforated portion is cylindrical.
Claim 17
Dependent Claim
13 words
A shroud as claimed in claim 6 wherein the perforated portion is cylindrical.
Claim 18
Dependent Claim
13 words
A shroud as claimed in claim 7 wherein the perforated portion is cylindrical.
Claim 19
Dependent Claim
13 words
A shroud as claimed in claim 11 wherein the perforated portion is cylindrical.
Claim 20
Dependent Claim
13 words
A shroud as claimed in claim 12 wherein the perforated portion is cylindrical.
References Cited (Backward Citations)
US4593429A
Cited
US4826515A
Cited
US4853011A
Cited
US5160356A
Cited
US4643748A
Cited
US4853008A
Cited
US5078761A
Cited
US5062870A
Cited
US5090976A
Cited
US5145499A
Cited
EP0489565A1
Cited
EP0636338A2
Cited
EP0557096A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-12-28 | 2002-06-29 | 2002-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-12-28 | 2006-06-29 | 2006-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-12-28 | 2010-06-29 | 2010-12-29 | $7700.00 | Window Closed / Lapsed |