Patent US3961255A successfully refreshed from Google Patents.
Patent US3744217A successfully refreshed from Google Patents.
US3744217A
Expired / Lapsed
US
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High-voltage ozone-free electrostatic air filter
Assignee: AEROPUR AG
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Filing: 1970-12-23
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Granted: 1973-07-10
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Expires: 1990-12-23
Abstract
Abstract An electrostatic air filter having an air duct defined in part by opposed walls over which liquid flows continuously. An electrode is suspended between the aforesaid walls and cooperates therewith to purify the air flowing through the duct. The electrode is connected to a high voltage source and is preferably divided into two parts, one of which is designed to produce a strong ionization with spray discharge.
Inventors
- 👤 P Ebert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:51
CPC Classifications
C; C01; C01B; C01B13/00; C01B13/10; C01B13/11; F; F24; F24F; F24F8/00; F24F8/10; F24F8/192; C01B2201/00; C01B2201/20; C01B2201/22; C01B2201/24; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y10; Y10S; Y10S55/00; Y10S55/36
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
130 words
Apparatus for filtering air comprising in combination: a duct having an inlet opening at one end and an outlet opening at the other end, the said duct having spaced opposed walls; means for causing liquid to flow over said walls; means in said duct for causing a flow of air therethrough; electrode means suspended in said duct between said walls, said electrode means being divided into a first section adjacent to said inlet opening and a second section adjacent to said outlet opening, said first section having a plurality of spaced plates extending transversally to the flow of air through said duct and said second section having flat plates extending parallel to the flow of air through said duct; and a high-voltage direct current generating means connected to said electrode.
Claim 2
Dependent Claim
130 words
Apparatus for filtering air comprising in combination: a duct having an inlet opening at one end and an outlet opening at the other end, the said duct having spaced opposed walls; means for causing liquid to flow over said walls; means in said duct for causing a flow of air therethrough; electrode means suspended in said duct between said walls, said electrode means being divided into a first section adjacent to said inlet opening and a second section adjacent to said outlet opening, said first section having a plurality of spaced plates extending transversally to the flow of air through said duct and said second section having flat plates extending parallel to the flow of air through said duct; and a high-voltage direct current generating means connected to said electrode.
Claim 3
Dependent Claim
24 words
The apparatus as claimed in claim 1 wherein the said generating means generates an operating current of between 20 and 100 KV direct current.
Claim 4
Dependent Claim
25 words
The apparatus as claimed in claim 2 further characterized by an active carbon filter in said duct between said electrode means and said outlet opening.
Claim 5
Dependent Claim
19 words
Apparatus according to claim 1 wherein both said duct and said electrode means are provided with generally U-shaped configurations.
Claim 6
Dependent Claim
34 words
Apparatus according to claim 1 wherein the said liquid is water, and wherein there is provided means for heating the water in order to increase the moistening of the air passing through said duct.
Claim 7
Dependent Claim
34 words
Apparatus according to claim 1 wherein there is provided means for injecting chemicals into the liquid being caused to flow over said walls, the said chemicals being operative to perfume or disinfect the liquid.
References Cited (Backward Citations)
US804291A
Cited
US3124437A
Cited
FR529210A
Cited
US1605648A
Cited
DE858692C
Cited
US3238702A
Cited
US3672126A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |