US3900299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expanding valves for electrostatic precipitators and the like
Assignee: JOY ENVIRONMENTAL EQUIPMENT Co
•
Filing: 1973-06-06
•
Granted: 1975-08-19
•
Expires: 1993-06-06
Abstract
Abstract A flow control system for an electrostatic precipitator or the like comprising a plurality of elongated inflatable fabric bags used as valves to stop gas flow to the precipitator or through selective portions of the precipitator when such bags are inflated.
Inventors
- 👤 Charles W Spehrley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:54
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/36; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87265; Y10T137/8741; Y10T137/87434
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
165 words
A FLOW CONTROL SYSTEM FOR AN ELECTROSTATIC PRECIPITATOR HAVING AN ESSEMBLY OF PARALLEL VERTICALLY EXTENDING LATERALLY SPACED COLLECTING CURTAINS CARRIED WITHIN A HOUSING COMPRISING: A PLURALITY OF ELONGATED FLEXIBLE SUBSTANTIALLY CYLINDRICAL VERTICALLY EXTENDING INFLATABLE CONTAINERS SECURED WITHIN SAID HOUSING IN JUXTAPOSITION WITH EACH OTHER AND RESPECTIVE ONES OF SAID CURTAINS TO SHUT OFF GAS FLOW BETWEEN CERTAIN OF SAID CURTAINS WHEN THE ONES OF SAID CONTAINERS RESPECTIVE TO SAID CERTAIN CURTAINS ARE INFLATED AND TO ALLOW SUBSTANTIALLY FREE GAS FLOW BETWEEN SAID CURTAINS WHEN SAID CONTAINERS ARE DEFLATED, MEANS FOR ALTERNATIVELY INFLATING CERTAIN OF SAID CONTAINERS AND MEANS FOR SIMULATANEOUSLY DEFLATING OTHER OF SAID CONTAINERS, AND SAID CONTAINERS EXTENDING BETWEEN AND BEING CONNECTED TO TOP AND BOTTOM MANDREL ELEMENTS, AT LEAST A PORTION OF EACH OF SAID MANDREL ELEMENTS ADJACENT THE CONNECTION BETWEEN A RESPECTIVE MANDREL ELEMENT AND CONTAINER BEING OF NON-CIRCULAR CROSS SECTION, SAID PROTION HAVING A MAXIMUM TRANSVERSE LENGTH AT LEAST ONE AND THREE QUARTERS AS GREAT AS THE MAXIMUM TRANSVERSE WIDTH THEREOF.
Claim 2
Dependent Claim
165 words
A FLOW CONTROL SYSTEM FOR AN ELECTROSTATIC PRECIPITATOR HAVING AN ESSEMBLY OF PARALLEL VERTICALLY EXTENDING LATERALLY SPACED COLLECTING CURTAINS CARRIED WITHIN A HOUSING COMPRISING: A PLURALITY OF ELONGATED FLEXIBLE SUBSTANTIALLY CYLINDRICAL VERTICALLY EXTENDING INFLATABLE CONTAINERS SECURED WITHIN SAID HOUSING IN JUXTAPOSITION WITH EACH OTHER AND RESPECTIVE ONES OF SAID CURTAINS TO SHUT OFF GAS FLOW BETWEEN CERTAIN OF SAID CURTAINS WHEN THE ONES OF SAID CONTAINERS RESPECTIVE TO SAID CERTAIN CURTAINS ARE INFLATED AND TO ALLOW SUBSTANTIALLY FREE GAS FLOW BETWEEN SAID CURTAINS WHEN SAID CONTAINERS ARE DEFLATED, MEANS FOR ALTERNATIVELY INFLATING CERTAIN OF SAID CONTAINERS AND MEANS FOR SIMULATANEOUSLY DEFLATING OTHER OF SAID CONTAINERS, AND SAID CONTAINERS EXTENDING BETWEEN AND BEING CONNECTED TO TOP AND BOTTOM MANDREL ELEMENTS, AT LEAST A PORTION OF EACH OF SAID MANDREL ELEMENTS ADJACENT THE CONNECTION BETWEEN A RESPECTIVE MANDREL ELEMENT AND CONTAINER BEING OF NON-CIRCULAR CROSS SECTION, SAID PROTION HAVING A MAXIMUM TRANSVERSE LENGTH AT LEAST ONE AND THREE QUARTERS AS GREAT AS THE MAXIMUM TRANSVERSE WIDTH THEREOF.
Claim 3
Dependent Claim
15 words
A flow control system as sepcified in claim 1 wherein said containers are fabric bags.
Claim 4
Dependent Claim
61 words
A flow control system as specified in claim 2 wherein a plurality of said bags and said curtains forms one valved section of such an apparatus and a second such plurality forms a second of such valved sections and means is provided for inflating and deflating said first plurality of bags and said second plurality of bags independently of each other.
Claim 5
Dependent Claim
30 words
A flow control system as specified in claim 2 wherein said mandrel portions are generally elliptical in cross section and are elongated in the direction of flow through said precipitator.
Claim 6
Dependent Claim
32 words
A flow control system as specified in claim 2 wherein each of said bags is fastened to a downstream end of one of said curtains and is at least vertically coextensive therewith.
Claim 7
Dependent Claim
39 words
A flow control system as specified in claim 5 wherein said maximum width of said non-circular shape is less than the spacing between said curtains and spaces between end portions of said bags are filled with dust stopping material.
Claim 8
Dependent Claim
113 words
A FLOW CONTROL SYSTEM FOR A GAS HANDLING APPARATUS HAVING AT LEAST ONE GAS CONDUCTING PASSAGEWAY THEREIN COMPRISING: AT LEAST ONE ELONGATED FLEXIBLE SUBSTANTIALLY CYLINDRICAL INFLATABLE CONTAINER LOCATED AT ADJACENT ONE END PORTION OF SAID PASSAGEWAY, MEANS FOR INFLATING SAID CONTAINER TO STOP GAS FLOW THROUGH SAID PASSAGEWAY, MEANS FOR DEFLATING SAID CONTAINER TO ALLOW SUBSTANTIALLY FREE FLOW THROUGH SAID PASSAGEWAY, SAID CONTAINER EXTENDING BETWEEN AND CONNECTED TO TOP AND BOTTOM MANDREL ELEMENTS, AT LEAST A PROTION OF EACH OF SAID MANDREL ELEMENTS ADJACENT THE CONNECTION BETWEEN A RESPECTIVE MANDREL ELEMENT AND CONTAINER BEING OF NON-CIRCULAR CROSS SECTION WITH SAID PORTION HAVING TRANSVERSE LENGTH AT LEAST 175% AS GREAT AS THE WIDTH THEREOF.
Claim 9
Dependent Claim
113 words
A FLOW CONTROL SYSTEM FOR A GAS HANDLING APPARATUS HAVING AT LEAST ONE GAS CONDUCTING PASSAGEWAY THEREIN COMPRISING: AT LEAST ONE ELONGATED FLEXIBLE SUBSTANTIALLY CYLINDRICAL INFLATABLE CONTAINER LOCATED AT ADJACENT ONE END PORTION OF SAID PASSAGEWAY, MEANS FOR INFLATING SAID CONTAINER TO STOP GAS FLOW THROUGH SAID PASSAGEWAY, MEANS FOR DEFLATING SAID CONTAINER TO ALLOW SUBSTANTIALLY FREE FLOW THROUGH SAID PASSAGEWAY, SAID CONTAINER EXTENDING BETWEEN AND CONNECTED TO TOP AND BOTTOM MANDREL ELEMENTS, AT LEAST A PROTION OF EACH OF SAID MANDREL ELEMENTS ADJACENT THE CONNECTION BETWEEN A RESPECTIVE MANDREL ELEMENT AND CONTAINER BEING OF NON-CIRCULAR CROSS SECTION WITH SAID PORTION HAVING TRANSVERSE LENGTH AT LEAST 175% AS GREAT AS THE WIDTH THEREOF.
Claim 10
Dependent Claim
37 words
A flow control system as specified in claim 7 wherein said at least one passageway is a plurality of passageways and said at least one container is a plurality of fabric bags respectively associated with said passageways.
Claim 11
Dependent Claim
32 words
A flow control system as specified in claim 7 wherein said mandrel portions are generally elliptical in cross section and are elongated in the direcTion of flow through said gas handling apparatus.
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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |