US3796024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter assembly
Assignee: Individual
•
Filing: 1972-08-23
•
Granted: 1974-03-12
•
Expires: 1992-08-23
Abstract
Abstract A filter assembly for application to a chimney exhaust is provided with a duct positioned at an angle to the axis of the chimney, a filter element is located in the duct at one side of said axis and a blower, communicating with the duct, serves to direct cool ambient air across said axis toward the filter to increase the chimney draft and cool the smoke, while forcing it through the filter. The filter is provided with a metal or other substantially rigid support and is removable from the duct for the cleaning or the disposal thereof.
Inventors
- 👤 R Mier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:51
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; F; F23; F23L; F23L17/00; F23L2700/00; F23L2700/001
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
167 words
Equipment for reducing the quantity of soot and fly ash, discharged from a chimney, comprising a unit to be applied to the chimney and including: a duct extending to each side of, and at a right angle to the axis of the chimney, said duct having a straight section extending to one side of chimney and a downwardly curving section extending from the other side of the chimney and open to the atmosphere; a filter assembly supported within said duct, concentric to the axis of said duct, and located in the straight section of said duct to one side of the axis of the chimney; a blower arranged to move air through said duct and through said filter element to cool the smoke and fumes issuing from the chimney and cause soot, fly ash, and the like, to be received and retained by said filtering assembly, said blower being located in the straight section of said duct between the axis of the chimney and said filter assembly.
Claim 2
Dependent Claim
167 words
Equipment for reducing the quantity of soot and fly ash, discharged from a chimney, comprising a unit to be applied to the chimney and including: a duct extending to each side of, and at a right angle to the axis of the chimney, said duct having a straight section extending to one side of chimney and a downwardly curving section extending from the other side of the chimney and open to the atmosphere; a filter assembly supported within said duct, concentric to the axis of said duct, and located in the straight section of said duct to one side of the axis of the chimney; a blower arranged to move air through said duct and through said filter element to cool the smoke and fumes issuing from the chimney and cause soot, fly ash, and the like, to be received and retained by said filtering assembly, said blower being located in the straight section of said duct between the axis of the chimney and said filter assembly.
Claim 3
Dependent Claim
31 words
Equipment as defined in claim 1, wherein: said filter assembly includes a filter bag and said filtering bag is supported by an open mesh metal work and is removably connected thereto.
Claim 4
Dependent Claim
37 words
The equipment of claim 1 wherein: said duct includes a recess in which is placed the motor used to drive said blower, such that said motor will be protected from heat and debris issuing from said chimney.
References Cited (Backward Citations)
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US2514809A
Cited
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Cited
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Cited
US3732075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |