US3653188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust collector
Assignee: Fuller Co
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Filing: 1970-06-18
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Granted: 1972-04-04
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Expires: 1990-06-18
Abstract
Abstract A dust collecting apparatus of the filter bag type including a housing having a plurality of filter bags mounted therein. Dirty gas flows into the inside of the bags and passes therethrough to an exhaust conduit. The dust in the gas is deposited on the inside surface of the bags. A reverse flow of clean air is used to clean the bags. This reverse flow collapses the bags and the collected dust falls into a hopper. A baffle arrangement controls the flow of clean air. Magnetically actuated reed switches mounted on some of the bags are used to control the baffle arrangement and thus the flow of clean air. In one form of the invention, a motor gradually opens a baffle in the clean air line to gradually increase the rate of clean air flow. When the bags collapse a predetermined amount, the reed switches are opened and the motor stops to thereby prevent a further increase in the reverse air flow and a further collapse of the bags.
Inventors
- 👤 Ervin Fisher
- 👤 Jay Warshawsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:12
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/04; B01D46/42; B01D46/44; B01D46/46; B01D46/66; B01D46/70; B01D2265/00; B01D2265/02; B01D2265/023
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
100 words
A dust collecting apparatus comprising: a housing; at least one flexible fabric filter bag mounted in said housing and having internal and external surfaces; means for supplying gas to be cleaned to said internal surface for passage through said filter bag whereby dust in said gas is deposited on said internal surface; means for exhausting cleaned gas from the said external surface; means for removing dust deposited on said internal surface of said filter bag including means for collapsing said filter bag; and means responsive to the collapse of the filter bag for limiting the amount said filter bag collapses.
Claim 2
Dependent Claim
100 words
A dust collecting apparatus comprising: a housing; at least one flexible fabric filter bag mounted in said housing and having internal and external surfaces; means for supplying gas to be cleaned to said internal surface for passage through said filter bag whereby dust in said gas is deposited on said internal surface; means for exhausting cleaned gas from the said external surface; means for removing dust deposited on said internal surface of said filter bag including means for collapsing said filter bag; and means responsive to the collapse of the filter bag for limiting the amount said filter bag collapses.
Claim 3
Dependent Claim
71 words
The dust collecting apparatus of claim 1 further comprising a tube sheet mounted in said housing and dividing said housing into first and second chambers and having at least one opening therein; said filter bag being open at one end and secured to said tube sheet so that its open end is in communication with the opening in said tube sheet and the filter bag is positioned in the second chamber.
Claim 4
Dependent Claim
46 words
The dust collecting apparatus of claim 2 wherein said means for supplying gas to be cleaned is flow connected to one of said first and second chambers and the means for exhausting cleaned gas is flow connected to the other of said first and second chambers.
Claim 5
Dependent Claim
110 words
The dust collector of claim 3 wherein said means for supplying gas to be cleaned is flow connected to said first chamber and said means for exhausting cleaned gas is flow connected to said second chamber and said means for collapsing said filter bag includes means for selectively connecting said second chamber to a source of clean air, means for preventing gas to be cleaned from being supplied to said first chamber and means for applying a reduced pressure to the inside of the filter bag whereby said filter bag is collapsed and dust which is deposited on the internal surface of the filter bag is removed from said bag.
Claim 6
Dependent Claim
35 words
The dust collector of claim 4 wherein said means for selectively connecting said second chamber to a source of clean air includes damper means for controlling the supply of clean air to the second chamber.
Claim 7
Dependent Claim
32 words
The dust collector of claim 5 wherein said means responsive to the amount said filter bag collapses is a position response switch mounted on said filter bag for controlling said damper means.
Claim 8
Dependent Claim
15 words
The dust collector of claIm 6 wherein said switch is a magnetically actuated reed switch.
Claim 9
Dependent Claim
23 words
The dust collector of claim 6 further comprising hopper means coextensive with said first chamber for collecting and discharging dust from the collector.
Claim 10
Dependent Claim
27 words
The dust collector of claim 1 wherein said means for limiting the amount the filter bag collapses includes a position responsive switch mounted on the filter bag.
Claim 11
Dependent Claim
185 words
In a dust collecting apparatus including a housing having a hopper for discharging collected dust, first duct means for supplying gas to be cleaned to the inside of said housing, second duct means for exhausting cleaned gas from the inside of said housing, a plurality of flexible fabric filter bags mounted in said housing, and means for directing gas to be cleaned to the inside of said filter bags whereby the gas passes through the filter filter bags and dust is deposited on the inside of the filter bags, means for removing the dust deposited on the inside of the filter bag from the inside of the filter bags comprising: means for selectively supplying clean air to the inside of the housing on the outside of the filter bags at a pressure greater than the pressure on the inside of the filter bags to thereby cause said filter bags to collapse and the dust deposited on the inside of the filter bags to fall into the hopper; and means responsive to the collapse of the filter bags for limiting the amount said filter bags collapse.
Claim 12
Dependent Claim
185 words
In a dust collecting apparatus including a housing having a hopper for discharging collected dust, first duct means for supplying gas to be cleaned to the inside of said housing, second duct means for exhausting cleaned gas from the inside of said housing, a plurality of flexible fabric filter bags mounted in said housing, and means for directing gas to be cleaned to the inside of said filter bags whereby the gas passes through the filter filter bags and dust is deposited on the inside of the filter bags, means for removing the dust deposited on the inside of the filter bag from the inside of the filter bags comprising: means for selectively supplying clean air to the inside of the housing on the outside of the filter bags at a pressure greater than the pressure on the inside of the filter bags to thereby cause said filter bags to collapse and the dust deposited on the inside of the filter bags to fall into the hopper; and means responsive to the collapse of the filter bags for limiting the amount said filter bags collapse.
Claim 13
Dependent Claim
55 words
The dust collecting apparatus of claim 10 wherein said means for selectively supplying clean air to the inside of the housing includes means for selectively connecting the inside of the housing to a source of clean air and means for substantially preventing gas to be cleaned from being supplied to the inside of the housing.
Claim 14
Dependent Claim
52 words
In the dust collecting apparatus of claim 11, said means for removing the dust further comprising baffle means mounted in said means for supplying clean air to the inside of the housing for controlling the flow of clean air to the inside of the housing and means for controlling said baffle means.
Claim 15
Dependent Claim
65 words
In the dust collecting apparatus of claim 12, said means for controlling said baffle means includes motor means operatively connected to said baffle means for opening and closing said baffle means and position actuated switch means mounted on at least one of said filter bags and operatively connected to said motor means to thereby define said means for limiting the amount the filter bags collapse.
Claim 16
Dependent Claim
35 words
In the dust collecting apparatus of claim 13, said position actuated switch means is a magnetically actuated reed switch which opens when the filter bag on which it is mounted collapses a predetermined a mount.
Claim 17
Dependent Claim
117 words
A dust collecting apparatus comprising: a housing; at least one flexible fabric filter bag mounted in said housing and having internal and external surfaces; means for supplying gas to be cleaned to one of said internal and external surfaces for passage through said filter bag whereby dust in said gas is deposited on one of said internal and external surfaces; means for exhausting cleaned gas from the other of said internal and external surfaces; means for removing dust deposited on one of said internal and external surfaces of said filter bag including means for deforming said filter bag; and means responsive to the deformation of the filter bag for limiting the amount the filter bag is deformed.
Claim 18
Dependent Claim
117 words
A dust collecting apparatus comprising: a housing; at least one flexible fabric filter bag mounted in said housing and having internal and external surfaces; means for supplying gas to be cleaned to one of said internal and external surfaces for passage through said filter bag whereby dust in said gas is deposited on one of said internal and external surfaces; means for exhausting cleaned gas from the other of said internal and external surfaces; means for removing dust deposited on one of said internal and external surfaces of said filter bag including means for deforming said filter bag; and means responsive to the deformation of the filter bag for limiting the amount the filter bag is deformed.
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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |