Patent US4666472A successfully refreshed from Google Patents.
US4666472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust collector with deflector means
Assignee: Venturedyne Ltd
•
Filing: 1985-10-15
•
Granted: 1987-05-19
•
Expires: 2005-10-15
Abstract
Abstract A dust collector comprising a hopper, an exhaust chamber, a wall separating the hopper and the exhaust chamber and including an opening, a hollow filter assembly for filtering contaminated air flowing through the opening from the hopper, the filter assembly comprising filter medium and having upper and lower ends, the upper end of the filter assembly registering with the wall opening such that the hopper is generally sealed from the exhaust chamber except through the wall opening and the filter medium of the filter assembly, an inlet into the hopper for introducing contaminated air into the hopper so that the contaminated air is caused to flow to the exhaust chamber through the filter medium whereby airborne contaminants are accumulated on the filter medium, a nozzle for selectively directing reverse pulses of air into the wall opening from the exhaust chamber whereby the reverse air pulses enter the filter assembly and generate airflow through the filter medium in the reverse of the direction of contaminated airflow to remove accumulated contaminants from the filter medium, and a deflector cylinder housed inside the lower end of the filter assembly for preventing the air pulses from impinging upon the filter medium.
Inventors
- 👤 William J. Klimczak
- 👤 Rano R. Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:05
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; B01D46/2403; B01D46/2411; B01D46/0039; B01D46/0041; B01D46/42; B01D46/4281; B01D46/52; B01D46/521; B01D46/66; B01D46/70; B01D46/71
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
294 words
A dust collector comprising a hopper, an exhaust chamber, a wall separating said hopper and said exhaust chamber, said wall including an opening, means for filtering contaminated air flowing through said opening from said hopper, said filtering means including a hollow filter assembly comprising filter medium and having upper and lower ends, said upper end of said filter assembly registering with said wall opening such that said hopper is generally sealed from said exhaust chamber except through said wall opening and said filter medium of said filter assembly, means defining an inlet into said hopper for introducing contaminated air into said hopper so that the contaminated air is caused to flow to said exhaust chamber through said filter medium whereby airborne contaminants are accumulated on said filter medium, means for selectively directing reverse pulses of air into said wall opening from said exhaust chamber whereby the reverse air pulses enter said filter assembly and generate airflow through said filter medium in the reverse of the direction of contaminated airflow to remove accumulated contaminants from said filter medium, and means for preventing the air pulses from impinging upon said filter medium, said means including deflector means housed inside said lower end of said filter assembly and generate deflector means including an air impermeable cylinder having an open upper end and an outer surface, said cylinder being supported by said lower end of said filter assembly and being positioned inside said filter assembly with said outer surface spaced from said filter medium, and with said upper end of said cylinder opening upwardly into said filter assembly, and said cylinder having a length such that the air pulses entering said wall opening enter said upper end of said cylinder and do not impinge upon said filter medium.
Claim 2
Dependent Claim
294 words
A dust collector comprising a hopper, an exhaust chamber, a wall separating said hopper and said exhaust chamber, said wall including an opening, means for filtering contaminated air flowing through said opening from said hopper, said filtering means including a hollow filter assembly comprising filter medium and having upper and lower ends, said upper end of said filter assembly registering with said wall opening such that said hopper is generally sealed from said exhaust chamber except through said wall opening and said filter medium of said filter assembly, means defining an inlet into said hopper for introducing contaminated air into said hopper so that the contaminated air is caused to flow to said exhaust chamber through said filter medium whereby airborne contaminants are accumulated on said filter medium, means for selectively directing reverse pulses of air into said wall opening from said exhaust chamber whereby the reverse air pulses enter said filter assembly and generate airflow through said filter medium in the reverse of the direction of contaminated airflow to remove accumulated contaminants from said filter medium, and means for preventing the air pulses from impinging upon said filter medium, said means including deflector means housed inside said lower end of said filter assembly and generate deflector means including an air impermeable cylinder having an open upper end and an outer surface, said cylinder being supported by said lower end of said filter assembly and being positioned inside said filter assembly with said outer surface spaced from said filter medium, and with said upper end of said cylinder opening upwardly into said filter assembly, and said cylinder having a length such that the air pulses entering said wall opening enter said upper end of said cylinder and do not impinge upon said filter medium.
Claim 3
Dependent Claim
43 words
A dust collector as set forth in claim 1 wherein said air pulse directing means includes means for causing the air pulses to propagate toward said wall opening in a cone-shaped pattern, said means including pulse generating means spaced above said wall opening.
Claim 4
Dependent Claim
17 words
A dust collector as set forth in claim 2 wherein said pulse generating means includes a nozzle.
Claim 5
Dependent Claim
33 words
A dust collector as set forth in claim 2 wherein said pulse generating means includes means for accelerating the air emitted toward said wall opening to supersonic velocity, said means including a nozzle.
Claim 6
Dependent Claim
54 words
A dust collector as set forth in claim 4 wherein said means for directing reverse pulses of air further includes a conduit in said exhaust chamber and means for supplying air under pressure to said conduit, and wherein said nozzle is supported by said conduit and directs air from said conduit toward said opening.
Claim 7
Independent Claim
297 words
A method for improving the operation of a dust collector wherein said dust collector includes a hopper, an exhaust chamber, a wall separating said hopper and said exhaust chamber, said wall including an opening, means for filtering contaminated air flowing through said opening from said hopper, said filtering means including a hollow filter assembly comprising filter medium and having upper and lower ends, said upper end of said filter assembly registering with said wall opening such that said hopper is generally sealed from said exhaust chamber except through said wall opening and said filter medium of said filter assembly, means defining an inlet into said hopper for introducing contaminated air into said hopper so that the contaminated air is caused to flow to said exhaust chamber through said filter medium whereby airborne contaminants are accumulated on said filter medium, means for selectively directing reverse pulses of air into said wall opening from said exhaust chamber whereby said reverse air pulses enter said filter assembly and generate an airflow through said filter medium in the reverse of the direction of contaminated airflow to remove accumulated contaminants from said filter medium, said method for improving the operation of the dust collector comprising the step of: inserting an air impermeable deflector cylinder having a length, an open upper end, and an outer surface into said filter assembly such that said cylinder is supported by said lower end of said filter assembly and is positioned inside said hollow filter assembly with said outer surface spaced from said filter medium, and with said upper end of said cylinder opening upwardly into said filter assembly, said cylinder length being such that the air pulses entering said wall opening enter said upper end of said cylinder and do not impinge upon said filter medium.
Claim 8
Independent Claim
297 words
A method for improving the operation of a dust collector wherein said dust collector includes a hopper, an exhaust chamber, a wall separating said hopper and said exhaust chamber, said wall including an opening, means for filtering contaminated air flowing through said opening from said hopper, said filtering means including a hollow filter assembly comprising filter medium and having upper and lower ends, said upper end of said filter assembly registering with said wall opening such that said hopper is generally sealed from said exhaust chamber except through said wall opening and said filter medium of said filter assembly, means defining an inlet into said hopper for introducing contaminated air into said hopper so that the contaminated air is caused to flow to said exhaust chamber through said filter medium whereby airborne contaminants are accumulated on said filter medium, means for selectively directing reverse pulses of air into said wall opening from said exhaust chamber whereby said reverse air pulses enter said filter assembly and generate an airflow through said filter medium in the reverse of the direction of contaminated airflow to remove accumulated contaminants from said filter medium, said method for improving the operation of the dust collector comprising the step of: inserting an air impermeable deflector cylinder having a length, an open upper end, and an outer surface into said filter assembly such that said cylinder is supported by said lower end of said filter assembly and is positioned inside said hollow filter assembly with said outer surface spaced from said filter medium, and with said upper end of said cylinder opening upwardly into said filter assembly, said cylinder length being such that the air pulses entering said wall opening enter said upper end of said cylinder and do not impinge upon said filter medium.
Claim 9
Dependent Claim
86 words
A method as set forth in claim 6 wherein said air pulse directing means includes a conduit in said exhaust chamber, means for supplying air under pressure to said conduit, and means for directing air from said conduit toward said wall opening such that said air pulses are emitted from said conduit and propagate toward said wall opening in a cone-shaped pattern, and wherein said method further comprises the step of providing a nozzle directing reverse pulses of air from said conduit toward said wall opening.
Claim 10
Dependent Claim
99 words
A method as set forth in claim 6 wherein said air pulse directing means includes a conduit in said exhaust chamber, means for supplying air under pressure to said conduit, and means for directing air from said conduit toward said wall opening such that said air pulses are emitted from said conduit and propagate toward said wall opening in a cone-shaped pattern, and wherein said method further comprises the step of providing a nozzle directing reverse pulses of air from said conduit toward said wall opening, said nozzle accelerating the air emitted toward said wall opening to supersonic velocity.
Claim 11
Independent Claim
281 words
An apparatus for use in a dust collector including a hopper, an exhaust chamber, a wall separating the hopper and the exhaust chamber, the wall including an opening means defining an inlet into the hopper for introducing contaminated air into the hopper, and means for selectively directing reverse pulses of air into the wall opening from the exhaust chamber, said apparatus comprising means for filtering contaminated air flowing through the opening from the hopper, said filtering means including a hollow filter assembly comprising filter medium and having upper and lower ends, said upper end of said filter assembly registering with the wall opening such that the hopper is generally sealed from the exhaust chamber except through the wall opening and said filter medium of said filter assembly so that the contaminated air is caused to flow to the exhaust chamber through said filter medium whereby airborne contaminants are accumulated on said filter medium, and so that the reverse air pulses enter said filter assembly and generate an airflow through said filter medium in the reverse of the direction of contaminated airflow to remove accumulated contaminants from said filter medium, and an air impermeable cylinder located in said filter assembly, said cylinder having an open upper end and an outer surface, said cylinder being supported by said lower end of said filter assembly and positioned inside said hollow filter assembly with said outer surface spaced from said filter medium, and with said upper end of said cylinder opening upwardly into said filter assembly, said cylinder having a length such that the air pulses entering the wall opening enter said upper end of said cylinder and do not impinge upon said filter medium.
Claim 12
Independent Claim
281 words
An apparatus for use in a dust collector including a hopper, an exhaust chamber, a wall separating the hopper and the exhaust chamber, the wall including an opening means defining an inlet into the hopper for introducing contaminated air into the hopper, and means for selectively directing reverse pulses of air into the wall opening from the exhaust chamber, said apparatus comprising means for filtering contaminated air flowing through the opening from the hopper, said filtering means including a hollow filter assembly comprising filter medium and having upper and lower ends, said upper end of said filter assembly registering with the wall opening such that the hopper is generally sealed from the exhaust chamber except through the wall opening and said filter medium of said filter assembly so that the contaminated air is caused to flow to the exhaust chamber through said filter medium whereby airborne contaminants are accumulated on said filter medium, and so that the reverse air pulses enter said filter assembly and generate an airflow through said filter medium in the reverse of the direction of contaminated airflow to remove accumulated contaminants from said filter medium, and an air impermeable cylinder located in said filter assembly, said cylinder having an open upper end and an outer surface, said cylinder being supported by said lower end of said filter assembly and positioned inside said hollow filter assembly with said outer surface spaced from said filter medium, and with said upper end of said cylinder opening upwardly into said filter assembly, said cylinder having a length such that the air pulses entering the wall opening enter said upper end of said cylinder and do not impinge upon said filter medium.
Claim 13
Dependent Claim
235 words
A dust collector comprising a hopper, an exhaust chamber, a wall separating said hopper and said exhaust chamber, said wall including an opening, means for filtering contaminated air flowing air flowing through said opening from said hopper, said filtering means including a hollow filter assembly comprising filter medium and having upper and lower ends, said upper end of said filter assembly registering with said wall opening such that said hopper is generally sealed from said exhaust chamber except through said wall opening and said filter medium of said filter assembly, means defining an inlet into said hopper for introducing contaminated air into said hopper so that the contaminated air is caused to flow to said exhaust chamber through said filter medium whereby airbourne contaminants are accumulated on said filter medium, means for selectively directing reverse pulses of air into said wall opening from said exhaust chamber whereby the reverse air pulses enter said filter assembly and generate airflow through said filter medium in the reverse of the direction of contaminated airflow to remove accumulated contaminants from said filter medium, said air pulse directing means including pulse generating means spaced above said wall opening for causing the air pulses to propagate toward said wall opening in a cone-shaped pattern, and means for preventing the air pulses from impinging upon said filter medium, said means including deflector means housed inside said lower end of said filter assembly.
Claim 14
Dependent Claim
235 words
A dust collector comprising a hopper, an exhaust chamber, a wall separating said hopper and said exhaust chamber, said wall including an opening, means for filtering contaminated air flowing air flowing through said opening from said hopper, said filtering means including a hollow filter assembly comprising filter medium and having upper and lower ends, said upper end of said filter assembly registering with said wall opening such that said hopper is generally sealed from said exhaust chamber except through said wall opening and said filter medium of said filter assembly, means defining an inlet into said hopper for introducing contaminated air into said hopper so that the contaminated air is caused to flow to said exhaust chamber through said filter medium whereby airbourne contaminants are accumulated on said filter medium, means for selectively directing reverse pulses of air into said wall opening from said exhaust chamber whereby the reverse air pulses enter said filter assembly and generate airflow through said filter medium in the reverse of the direction of contaminated airflow to remove accumulated contaminants from said filter medium, said air pulse directing means including pulse generating means spaced above said wall opening for causing the air pulses to propagate toward said wall opening in a cone-shaped pattern, and means for preventing the air pulses from impinging upon said filter medium, said means including deflector means housed inside said lower end of said filter assembly.
Claim 15
Dependent Claim
98 words
A dust collector as set forth in claim 10 wherein said deflector means includes an air impermeable cylinder having an open upper end and an outer surface, said cylinder being supported by said lower end of said filter assembly and being positioned inside said filter assembly with said outer surface spaced from said filter medium, and with said upper end of said cylinder opening upwardly into said filter assembly, said cylinder having a length such that the air pulses entering said wall opening enter said upper end of said cylinder and do not impinge upon said filter medium.
Claim 16
Dependent Claim
17 words
A dust collector as set forth in claim 10 wherein said pulse generating means includes a nozzle.
Claim 17
Dependent Claim
33 words
A dust collector as set forth in claim 10 wherein said pulse generating means includes means for accelerating the air emitted toward said wall opening to supersonic velocity, said means including a nozzle.
Claim 18
Dependent Claim
54 words
A dust collector as set forth in claim 13 wherein said means for directing reverse pulses of air further includes a conduit in said exhaust chamber and means for supplying air under pressure to said conduit, and wherein said nozzle is supported by said conduit and directs air from said conduit toward said opening.
Claim 19
Dependent Claim
207 words
A dust collector comprising a hopper, an exhaust chamber, a wall separating said hopper and said exhaust chamber, said wall including an opening, means for filtering contaminated air flowing through said opening from said hopper, said filtering means including a hollow filter assembly comprising filter medium and having upper and lower ends, said upper end of said filter assembly registering with said wall opening such that said hopper is generally sealed from said exhaust chamber except through said wall opening and said filter medium of said filter assembly, means defining an inlet into said hopper for introducing contaminated air into said hopper so that the contaminated air is caused to flow to said exhaust chamber through said filter medium whereby airbourne contaminants are accumulated on said filter medium, means for selectively directing reverse pulses of air into said wall opening from said exhaust chamber whereby the reverse air pulses enter said filter assembly and generate airflow through said filter medium in the reverse of the direction of contaminated airflow to remove accumulated contaminants from said filter medium, and means for preventing the air pulses from impinging upon said filter medium, said means including an upwardly opening cup-shaped member housed inside said lower end of said filter assembly.
Claim 20
Dependent Claim
207 words
A dust collector comprising a hopper, an exhaust chamber, a wall separating said hopper and said exhaust chamber, said wall including an opening, means for filtering contaminated air flowing through said opening from said hopper, said filtering means including a hollow filter assembly comprising filter medium and having upper and lower ends, said upper end of said filter assembly registering with said wall opening such that said hopper is generally sealed from said exhaust chamber except through said wall opening and said filter medium of said filter assembly, means defining an inlet into said hopper for introducing contaminated air into said hopper so that the contaminated air is caused to flow to said exhaust chamber through said filter medium whereby airbourne contaminants are accumulated on said filter medium, means for selectively directing reverse pulses of air into said wall opening from said exhaust chamber whereby the reverse air pulses enter said filter assembly and generate airflow through said filter medium in the reverse of the direction of contaminated airflow to remove accumulated contaminants from said filter medium, and means for preventing the air pulses from impinging upon said filter medium, said means including an upwardly opening cup-shaped member housed inside said lower end of said filter assembly.
Claim 21
Dependent Claim
72 words
A dust collector as set forth in claim 15 wherein said member has an open upper end and an outer surface and is supported by said lower end of said filter assembly with said outer surface spaced from said filtcr medium, and wherein said member has a length such that the air pulses entering said wall opening enter said upper end of said member and do not impinge upon said filter medium.
Claim 22
Dependent Claim
203 words
A dust collector comprising a hopper, an exhaust chamber, said exhaust a wall separating said hopper and chamber, said wall including an opening, means for filtering contaminated air flowing said opening from said hopper, said filtering means including a hollow filter assembly comprising filter medium and having an end registering with said wall opening such that said hopper is generally sealed from said exhaust chamber except through said wall opening and said filter medium of said filter assembly, means defining an inlet into said hopper for introducing contaminated air into said hopper so that the contaminated air is caused to flow to said exhaust chamber through said filter medium whereby airbourne contaminants are accumulated on said filter medium, means located outside said filter assembly for selectively directing reverse pulses of air through said wall opening and into said filter assembly, and deflector means housed inside said filter assembly for intercepting the air pulses and for preventing the air pulses from impinging upon said filter medium, whereby the air pressure in said filter assembly increases until reaching a level sufficient to generate airflow through said filter medium in the reverse of the direction of contaminated airflow to remove accumulated contaminants from said filter medium.
Claim 23
Dependent Claim
203 words
A dust collector comprising a hopper, an exhaust chamber, said exhaust a wall separating said hopper and chamber, said wall including an opening, means for filtering contaminated air flowing said opening from said hopper, said filtering means including a hollow filter assembly comprising filter medium and having an end registering with said wall opening such that said hopper is generally sealed from said exhaust chamber except through said wall opening and said filter medium of said filter assembly, means defining an inlet into said hopper for introducing contaminated air into said hopper so that the contaminated air is caused to flow to said exhaust chamber through said filter medium whereby airbourne contaminants are accumulated on said filter medium, means located outside said filter assembly for selectively directing reverse pulses of air through said wall opening and into said filter assembly, and deflector means housed inside said filter assembly for intercepting the air pulses and for preventing the air pulses from impinging upon said filter medium, whereby the air pressure in said filter assembly increases until reaching a level sufficient to generate airflow through said filter medium in the reverse of the direction of contaminated airflow to remove accumulated contaminants from said filter medium.
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) | 1990-05-18 | 1990-11-17 | 1991-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-18 | 1994-11-17 | 1995-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-18 | 1998-11-17 | 1999-05-19 | $7700.00 | Window Closed / Lapsed |