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US6740144B2 Expired / Lapsed US ⏱️ 0.0 years remaining

Vacuum cleaner utilizing electrostatic filtration and electrostatic precipitator for use therein

Assignee: Polar Light Ltd
•
Filing: 2002-01-14
•
Granted: 2004-05-25
•
Expires: 2022-01-14
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Abstract

Abstract A device for filtering a dirty air stream in a vacuum cleaner to obtain a clean air stream includes subjecting the dirty air stream to a first cyclonic separation stage to obtain a partially cleaned air stream and subjecting the partially cleaned air stream to an electronic filtration stage and optionally a second cyclonic separation stage to obtain the clean air stream. The electronic filtration stage is optionally removable with a cyclonic cleaning stage from the vacuum cleaner. The electronic filtration stage is optionally an electrostatic precipitator which utilizes air flow through the vacuum cleaner to generate the voltage used by the electrostatic precipitator.

Inventors

  • 👤 Wayne Ernest Conrad
  • 👤 Helmut Gerhard Conrad

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 19:44
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/12; A47L9/122; A47L9/16; A47L9/1616; A47L9/1625; A47L9/1641; A47L9/1658; A47L9/1666; A47L9/1691; B; B01; B01D; B01D45/00; B01D45/12; B01D45/16; B01D50/00; B04; B04C; B04C5/00; B04C5/24; B04C9/00; B04C2009/002; Y; Y10; Y10S; Y10S55/00; Y10S55/03

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 77 words
An upright vacuum cleaner comprising: (a) a cleaning head; (b) an upper body portion pivotally mounted on the cleaning head, the upper body portion comprising a cyclonic cleaning stage, the cyclonic cleaning stage including a cyclonic container, wherein the cyclone container is removable from the upper body portion; and, (c) a motor for producing air flow through the vacuum cleaner positioned above the cyclonic cleaning stage when the upper body portion is pivoted to be generally vertical.
Claim 2
Dependent Claim 77 words
An upright vacuum cleaner comprising: (a) a cleaning head; (b) an upper body portion pivotally mounted on the cleaning head, the upper body portion comprising a cyclonic cleaning stage, the cyclonic cleaning stage including a cyclonic container, wherein the cyclone container is removable from the upper body portion; and, (c) a motor for producing air flow through the vacuum cleaner positioned above the cyclonic cleaning stage when the upper body portion is pivoted to be generally vertical.
Claim 3
Dependent Claim 21 words
The vacuum cleaner as claimed in claim 1 further comprising a second cyclonic cleaning stage downstream from the cyclonic cleaning stage.
Claim 4
Dependent Claim 28 words
The vacuum cleaner as claimed in claim 2 wherein the first cyclonic cleaning stage comprises one cyclone and the second cyclonic cleaning stage comprises at least one cyclone.
Claim 5
Dependent Claim 24 words
The vacuum cleaner as claimed in claim 2 wherein the second cyclonic cleaning stage comprises a plurality of cyclones arranged to operate in parallel.
Claim 6
Dependent Claim 23 words
The vacuum cleaner as claimed in claim 1 further comprising a further cleaning member positioned between the cyclonic cleaning stage and the motor.
Claim 7
Dependent Claim 17 words
The vacuum cleaner as claimed in claim 5 wherein the further cleaning member comprises an electrostatic precipitator.
Claim 8
Dependent Claim 19 words
The vacuum cleaner as claimed in claim 6 wherein the electrostatic precipitator is removably mounted in the cyclone container.
Claim 9
Dependent Claim 30 words
The vacuum cleaner as claimed in claim 7 wherein the cyclone container has an air outlet and the electrostatic precipitator is positioned in the air outlet of the cyclone container.
Claim 10
Dependent Claim 31 words
The vacuum cleaner as claimed in claim 7 wherein the cyclone container has an air outlet and the electrostatic precipitator is removably mounted in the air outlet of the cyclone container.
Claim 11
Dependent Claim 19 words
The vacuum cleaner as claimed in claim 1 wherein the cyclonic cleaning stage is the primary dirt separation member.

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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) 2007-05-25 2007-11-24 2008-05-25 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2011-05-25 2011-11-24 2012-05-25 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2015-05-25 2015-11-24 2016-05-25 $7700.00 Window Closed / Lapsed

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