US3985527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bag filter installation
Assignee: British Steel Corp
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Filing: 1975-04-03
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Granted: 1976-10-12
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Expires: 1995-04-03
Abstract
Abstract This invention relates to bag filter installations, and more particularly relates to a bag filter housing having a number of compartments each including a multiplicity of filter bags. Each compartment includes an offtake duct with a hose coupling on it and a valve by which the duct may be selectively connected to the upstream side of the fan whereby the suction from the latter is utilisable for cleaning the compartment through the hose coupling.
Inventors
- 👤 Douglas James Smithson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:27
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
203 words
A bag filter installation, comprising: a plurality of compartments in said istallation, each compartment having means defining a plurality of inlet openings and a clean air outlet opening; a plurality of filter bags in each of said compartments; means coupling one side of each of said filter bags in each of said compartment to a respective one of said inlet openings; a main flow duct; means operably connecting said main flow duct with said one side of the filter bags in each of said compartments; a fan mounted in said main flow duct for conveying gases in the main flow duct to each of said filter bags; manifold means connected to each of said compartments on the other side of said filter bags and to the main flow duct on the suction side of the fan; hose coupling means in each of said compartments; duct means connecting said coupling means in each of said compartments to the respective manifold means; and a valve in each of said duct means by which the corresponding duct may be selectibly connected to the suction side of the fan whereby the fan suction is utilizable for cleaning local areas in the selected compartment through the hose coupling.
Claim 2
Dependent Claim
203 words
A bag filter installation, comprising: a plurality of compartments in said istallation, each compartment having means defining a plurality of inlet openings and a clean air outlet opening; a plurality of filter bags in each of said compartments; means coupling one side of each of said filter bags in each of said compartment to a respective one of said inlet openings; a main flow duct; means operably connecting said main flow duct with said one side of the filter bags in each of said compartments; a fan mounted in said main flow duct for conveying gases in the main flow duct to each of said filter bags; manifold means connected to each of said compartments on the other side of said filter bags and to the main flow duct on the suction side of the fan; hose coupling means in each of said compartments; duct means connecting said coupling means in each of said compartments to the respective manifold means; and a valve in each of said duct means by which the corresponding duct may be selectibly connected to the suction side of the fan whereby the fan suction is utilizable for cleaning local areas in the selected compartment through the hose coupling.
Claim 3
Dependent Claim
48 words
A bag filter installation according to claim 1, wherein said means operably connecting said main flow duct with said one side of the filter bags comprises a dust discharge chamber having discharge means mounted below each said compartment into which dust collected in the bags gravitates during cleaning.
Claim 4
Dependent Claim
89 words
A bag filter installation according to claim 1 wherein said means operably connecting the main flow duct with said one side of the filter bags in each of said compartments comprises a dust discharge chamber having discharge means disposed below each of said compartments and in communication with the plurality of inlet openings in the respective compartment, a separate gas conducting leg in each chamber connected to the main flow duct, and a valve in each leg whereby any selected leg may be closed and the respective compartment isolated.
Claim 5
Dependent Claim
56 words
A bag filter installation according to claim 1 wherein said means operably connecting the main flow duct with said one side of the filter bags comprises a separate leg for each compartment connected to said main flow duct, and a valve in each leg whereby any selected leg may be closed and the respective compartment isolated.
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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) | 1979-10-12 | 1980-04-12 | 1980-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-12 | 1984-04-12 | 1984-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-12 | 1988-04-12 | 1988-10-12 | $7700.00 | Window Closed / Lapsed |