US3945813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust collector
Assignee: Individual
•
Filing: 1975-01-16
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Granted: 1976-03-23
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Expires: 1995-01-16
Abstract
Abstract This invention relates to improvements in and relating to filtering dust collectors. The improved filtering dust-collector is characterized by the provision of a number of dust-repulsing electrodes which are provided in close proximity to or even embedded within the filter material, said electrodes being adapted for being impressed with a single phase or a multi-phase high A. C. voltage.
Inventors
- 👤 Koichi Iinoya
- 👤 Kazutaka Makino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:10
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/88; B03C3/885
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
194 words
A combined dust-collector and filter assembly wherein a stationary, regid and hollow casing is provided for defining a passage having an inlet and an outlet opening positioned at opposite sides of said casing for the receiption of a dust-containing gas stream and for the discharge of a refined gas stream after passage through the interior space of said casing, respectively, a plurality of ionizing stationary electrodes are provided in proximity to said inlet opening for ionizing dust particles contained in the said inlet stream, a mechanical filter disposed across said entire passage for filtering off said ionized dust particles from said inlet gas stream flowing through said filter, a plurality of dust-repulsing electrodes are positioned in close proximity to or within the material of said filter and a voltage source for applying multi-phase A.C. high voltage to said electrodes each time for short duration of time for electrodynamically driving separated and accumulated dust particles in the form of a filter cake deposited in and on said filter, off the filter, a hopper formed at the bottom of said casing for collecting the electrodynamically drivenoff dust particles, and a dust-discharge valve positioned in said hopper.
Claim 2
Dependent Claim
194 words
A combined dust-collector and filter assembly wherein a stationary, regid and hollow casing is provided for defining a passage having an inlet and an outlet opening positioned at opposite sides of said casing for the receiption of a dust-containing gas stream and for the discharge of a refined gas stream after passage through the interior space of said casing, respectively, a plurality of ionizing stationary electrodes are provided in proximity to said inlet opening for ionizing dust particles contained in the said inlet stream, a mechanical filter disposed across said entire passage for filtering off said ionized dust particles from said inlet gas stream flowing through said filter, a plurality of dust-repulsing electrodes are positioned in close proximity to or within the material of said filter and a voltage source for applying multi-phase A.C. high voltage to said electrodes each time for short duration of time for electrodynamically driving separated and accumulated dust particles in the form of a filter cake deposited in and on said filter, off the filter, a hopper formed at the bottom of said casing for collecting the electrodynamically drivenoff dust particles, and a dust-discharge valve positioned in said hopper.
Claim 3
Dependent Claim
21 words
A combined dust-collector and filter assembly as set forth in claim 1 wherein said dust-repulsing electrodes are imbedded in said filter.
Claim 4
Dependent Claim
189 words
A combined dust collector and filter assembly comprising a stationary, rigid, hollow casing defining a passage having an inlet and an outlet opening positioned at opposite ends of said casing for the reception of a dust contining gas stream and for the discharge of a refined gas stream after passage through the interior space of said casing respectively, a plurality of ionizing stationary electrodes mounted in said casing in proximity to said inlet opening for ionizing dust particles contained in said inlet stream, a mechanical filter disposed in said casing across said entire passage for filtering off said ionized dust particles from said inlet gas stream flowing through said filter, a plurality of dust-repulsing electrodes covered with respective insulator sheaths mounted in said casing in close proximity to the material of said filter and a voltage source for applying a.c. voltage to said electrodes periodically for a short duration of time for electrodynamically driving dust particles which have accumulated on said filter off said filter, a hopper formed at the bottom of said casing for collecting the driven-off dust particles and a dust discharge valve positioned in said hopper.
Claim 5
Dependent Claim
189 words
A combined dust collector and filter assembly comprising a stationary, rigid, hollow casing defining a passage having an inlet and an outlet opening positioned at opposite ends of said casing for the reception of a dust contining gas stream and for the discharge of a refined gas stream after passage through the interior space of said casing respectively, a plurality of ionizing stationary electrodes mounted in said casing in proximity to said inlet opening for ionizing dust particles contained in said inlet stream, a mechanical filter disposed in said casing across said entire passage for filtering off said ionized dust particles from said inlet gas stream flowing through said filter, a plurality of dust-repulsing electrodes covered with respective insulator sheaths mounted in said casing in close proximity to the material of said filter and a voltage source for applying a.c. voltage to said electrodes periodically for a short duration of time for electrodynamically driving dust particles which have accumulated on said filter off said filter, a hopper formed at the bottom of said casing for collecting the driven-off dust particles and a dust discharge valve positioned in said hopper.
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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) | 1979-03-23 | 1979-09-22 | 1980-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-23 | 1983-09-22 | 1984-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-23 | 1987-09-22 | 1988-03-23 | $7700.00 | Window Closed / Lapsed |