US4473382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cleaning and circulating apparatus
Assignee: Lasko Holdings Inc
•
Filing: 1983-07-08
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Granted: 1984-09-25
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Expires: 2003-07-08
Abstract
Abstract Air cleaning and circulating apparatus is disclosed, wherein the apparatus is of the hassock fan type with a negative ion generator in the intake air stream to charge particles to be removed, which are then passed over and or through a charged filter which removes them, the air is ionized a second time and discharged for use.
Inventors
- 👤 Edward P. Cheslock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:19
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/28; B03C3/02; B03C3/04; B03C3/14; B03C3/155; F; F24; F24F; F24F8/00; F24F8/10; F24F8/192; Y; Y02; Y02A; Y02A50/00; Y02A50/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
143 words
Air cleaning and circulating apparatus of the hassock fan type which includes a dish shaped base, an electric motor mounted to said base, a shaft extending vertically upwardly from said motor, a fan mounted to said shaft, a plurality of vertically extending ribs mounted to said base, a plurality of panels detachably mounted to said ribs, said panels being provided with air intake slots therein, a cone mounted to said ribs at the top, a top panel detachably mounted to said cone spaced upwardly from said panels, at least one negative ion generator mounted to said cone adjacent the center thereof, a filter mounted to said cone adjacent said ion generator in the path of air from said fan, and at least one negative ion generator mounted to said cone on the opposite side of said filter from said first mentioned ion generator.
Claim 2
Dependent Claim
143 words
Air cleaning and circulating apparatus of the hassock fan type which includes a dish shaped base, an electric motor mounted to said base, a shaft extending vertically upwardly from said motor, a fan mounted to said shaft, a plurality of vertically extending ribs mounted to said base, a plurality of panels detachably mounted to said ribs, said panels being provided with air intake slots therein, a cone mounted to said ribs at the top, a top panel detachably mounted to said cone spaced upwardly from said panels, at least one negative ion generator mounted to said cone adjacent the center thereof, a filter mounted to said cone adjacent said ion generator in the path of air from said fan, and at least one negative ion generator mounted to said cone on the opposite side of said filter from said first mentioned ion generator.
Claim 3
Dependent Claim
21 words
Air cleaning and circulating apparatus as defined in claim 1 in which said electric motor is provided with speed control means.
Claim 4
Dependent Claim
25 words
Air cleaning and circulating apparatus as defined in claim 1 in which said filter includes a filter element which carries an un-induced positive electrical charge.
Claim 5
Dependent Claim
18 words
Air cleaning and circulating apparatus as defined in claim 1 in which said filter includes a removable pre-filter.
Claim 6
Dependent Claim
20 words
Air cleaning and circulating apparatus as defined in claim 4 in which said filter includes an electrically charged filter element.
Claim 7
Dependent Claim
19 words
Air cleaning and circulating apparatus as defined in claim 5 in which said electrically charged filter element is pre-charged.
Claim 8
Dependent Claim
20 words
Air cleaning and circulating apparatus as defined in claim 5 in which said electrically charged filter element is electrically conductive.
References Cited (Backward Citations)
US2431724A
Cited
US2652193A
Cited
US2630267A
Cited
US2625319A
Cited
US3716966A
Cited
US4069026A
Cited
US3747300A
Cited
US3783588A
Cited
US3929436A
Cited
US4185972A
Cited
US4334766A
Cited
DE2920813A1
Cited
US4253852A
Cited
US4339782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-25 | 1988-03-26 | 1988-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-25 | 1992-03-26 | 1992-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-25 | 1996-03-26 | 1996-09-25 | $7700.00 | Window Closed / Lapsed |