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US4077784A
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US
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Electric filter
Assignee: Individual
•
Filing: 1975-09-29
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Granted: 1978-03-07
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Expires: 1995-09-29
Abstract
Abstract An electric filter for separating impurities from air including a housing which contains separator plates disposed in spaced relationship and formed of conductive material and alternate ones of said plates are connected to opposite poles of a source of voltage.
Inventors
- 👤 Lauri Vayrynen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:57
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/02; B03C3/04; B03C3/06; Y; Y10; Y10S; Y10S55/00; Y10S55/33
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
162 words
An electric filter for separating impurities from air comprising: a first housing member and a second housing member constructed of an electrical insulating material; at least one tubular electrostatic separator plate integrally secured at one axial end to a first side of each of said housing members, said separator plates being constructed of an electrical insulating material; insulating means securing said housing members together in a spaced relationship so that the first sides of the housing members face each other and so that the separator plates are coaxial and radially spaced from each other thereby forming an air passage between the separator plates; air inlet means formed in the first housing member and air outlet means formed in the second housing member; an electrically conductive coating formed on said separator plates and on the first side of each housing member; and means for connecting the electrically conductive coatings on the two housing members to opposite poles of a source of electrical energy.
Claim 2
Dependent Claim
162 words
An electric filter for separating impurities from air comprising: a first housing member and a second housing member constructed of an electrical insulating material; at least one tubular electrostatic separator plate integrally secured at one axial end to a first side of each of said housing members, said separator plates being constructed of an electrical insulating material; insulating means securing said housing members together in a spaced relationship so that the first sides of the housing members face each other and so that the separator plates are coaxial and radially spaced from each other thereby forming an air passage between the separator plates; air inlet means formed in the first housing member and air outlet means formed in the second housing member; an electrically conductive coating formed on said separator plates and on the first side of each housing member; and means for connecting the electrically conductive coatings on the two housing members to opposite poles of a source of electrical energy.
Claim 3
Dependent Claim
29 words
The electric filter as defined in claim 1 and in which the outer radial surface of the radially outermost separator plate is not coated with the electrically conductive material.
Claim 4
Dependent Claim
40 words
The electric filter as defined in claim 1 and in which said insulating means comprises a tubular insulating member constructed of electrically insulating material and disposed axially between said housing members and around the outer periphery of the housing members.
Claim 5
Dependent Claim
29 words
The electric filter as defined in claim 3 and in which said insulating member is provided with an interior surface, said surface being provided with a plurality of grooves.
Claim 6
Dependent Claim
34 words
The electric filter as defined in claim 1 and including a check valve disposed in said outlet means to permit gas flow only in the direction from said inlet means to said outlet means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |