Patent US4521231A successfully refreshed from Google Patents.
US4521231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High capacity gas filter system
Assignee: General Electric Environmental Services Inc
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Filing: 1983-11-10
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Granted: 1985-06-04
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Expires: 2003-11-10
Abstract
Abstract A high capacity gas filter having a particulate collector hopper having a bag housing mounted thereon with the walls of the housing extending outwardly and upwardly from the hopper. The walls terminate in gas passages which may be covered by outwardly extending hoods open at the underside thereof so as to provide for entrance of the dirty air. This opening extends substantially the entire periphery of the housing. A rigid tube sheet having orifices therein extends across the top of the bag housing and rigid frames support bag filters extending downwardly below the orifices and into the housing. A clean air plenum is mounted above the rigid sheet and is connected to a blower for pulling air through the gas passage, downwardly and inwardly along and through the filters and into the clean air plenum. This configuration permits a lower velocity air input and thus provides a higher air-to-cloth ratio while substantially reducing bag deterioration.
Inventors
- 👤 Norman Z. Shilling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:07
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/04; B01D46/66; B01D46/70; B01D46/71
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
153 words
A high capacity gas filter comprising a particulate collector hopper; a housing mounted on said hopper and communicating therewith, said housing comprising wall means extending outwardly and upwardly from said hopper; a rigid sheet having a plurality of orifices therein; gas permeable means interconnecting the upper edges of said wall means about the perimeter of said rigid sheet so as to provide a circumferential gas passage; a plurality of frames supported by said rigid sheet and extending downwardly from said orifices and into said housing; a filter bag surrounding each of said frames, the filter bag extending through the housing and terminating at the lower end of the housing; a clean air plenum mounted above said rigid sheet; and means for causing gas to pass into said housing through said circumferential gas passage, downwardly and inwardly along said filter bags, through said filter bags and into said plenum without the use of baffles.
Claim 2
Dependent Claim
153 words
A high capacity gas filter comprising a particulate collector hopper; a housing mounted on said hopper and communicating therewith, said housing comprising wall means extending outwardly and upwardly from said hopper; a rigid sheet having a plurality of orifices therein; gas permeable means interconnecting the upper edges of said wall means about the perimeter of said rigid sheet so as to provide a circumferential gas passage; a plurality of frames supported by said rigid sheet and extending downwardly from said orifices and into said housing; a filter bag surrounding each of said frames, the filter bag extending through the housing and terminating at the lower end of the housing; a clean air plenum mounted above said rigid sheet; and means for causing gas to pass into said housing through said circumferential gas passage, downwardly and inwardly along said filter bags, through said filter bags and into said plenum without the use of baffles.
Claim 3
Dependent Claim
22 words
The filter of claim 1 wherein the distal ends of said filter bags terminate substantially at the lower end of said housing.
Claim 4
Dependent Claim
16 words
The filter of claim 1 wherein said gas permeable means comprises an open circumferential gas passage.
Claim 5
Dependent Claim
14 words
The filter of claim 3 further comprising a debris screen mounted across said passage.
Claim 6
Dependent Claim
14 words
The filter of claim 1 wherein said filter bags are of a fabric material.
Claim 7
Dependent Claim
24 words
The filter of claim 1 further comprising means for intermittently applying pulses of air through said orifices into the interior of said filter bags.
Claim 8
Dependent Claim
16 words
The filter of claim 1 wherein all of said filter bags are mounted above said hopper.
Claim 9
Dependent Claim
15 words
The filter of claim 1 wherein said frames are removable and said bags are replaceable.
Claim 10
Dependent Claim
145 words
A high capacity gas filter comprising a particulate collector hopper; a housing having outwardly extending walls mounted on said hopper; an open hood mounted on said walls about the upper perimeter of said housing so as to provide a circumferential gas passage between the exterior and interior of said housing; a tube sheet having a plurality of orifices therein mounted on top of said hood so as to cover said housing; a plurality of frame supported elongated filter bags extending downwardly into said housing from each of said orifices, said filter bags terminating at the lower end of the housing; a clean air plenum mounted above said rigid sheet; and means for causing gas to pass through said circumferential passage into the upper area of said housing, downwardly and inwardly along and through said filter bags and into said plenum without the use of baffles.
Claim 11
Dependent Claim
145 words
A high capacity gas filter comprising a particulate collector hopper; a housing having outwardly extending walls mounted on said hopper; an open hood mounted on said walls about the upper perimeter of said housing so as to provide a circumferential gas passage between the exterior and interior of said housing; a tube sheet having a plurality of orifices therein mounted on top of said hood so as to cover said housing; a plurality of frame supported elongated filter bags extending downwardly into said housing from each of said orifices, said filter bags terminating at the lower end of the housing; a clean air plenum mounted above said rigid sheet; and means for causing gas to pass through said circumferential passage into the upper area of said housing, downwardly and inwardly along and through said filter bags and into said plenum without the use of baffles.
Claim 12
Dependent Claim
15 words
The filter of claim 9 further comprising a debris screen mounted across said open hood.
Claim 13
Dependent Claim
22 words
The filter of claim 9 wherein the distal ends of said filter bags terminate substantially at the lower end of said housing.
Claim 14
Dependent Claim
14 words
The filter of claim 9 wherein said filter bags are of a fabric material.
Claim 15
Dependent Claim
23 words
The filter of claim 9 further comprising means for intermittently applying pulses of air through said orifices into the interior of said bags.
References Cited (Backward Citations)
US960564A
Cited
US1757834A
Cited
US1837836A
Cited
US1843639A
Cited
US2035592A
Cited
FR1078802A
Cited
US3057137A
Cited
US3212237A
Cited
US3295298A
Cited
US3480330A
Cited
US3648442A
Cited
DE2058142A1
Cited
US3739557A
Cited
US3877899A
Cited
US3856489A
Cited
US3871845A
Cited
US3898062A
Cited
US3945400A
Cited
US3955947A
Cited
US4133659A
Cited
US4113449A
Cited
DE2738504A1
Cited
US4277255A
Cited
US4336035A
Cited
US4297115A
Cited
US4360370A
Cited
US4343631A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-03 | 1988-12-03 | 1989-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-03 | 1992-12-03 | 1993-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-03 | 1996-12-03 | 1997-06-04 | $7700.00 | Window Closed / Lapsed |