Patent US3767536A successfully refreshed from Google Patents.
US3767536A
Expired / Lapsed
US
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Dust collecting system in a coal charging operation for coke ovens
Assignee: Sumikin Coke Co Ltd
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Filing: 1971-11-04
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Granted: 1973-10-23
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Expires: 1991-11-04
Abstract
Abstract This invention is a dust collecting system for gases containing dust produced in the case of charging coke ovens with coal wherein a plurality of divided sub-ducts are arranged on coke ovens and a main duct connected with them is connected with a dust removing apparatus so that a discharged gas having passed through a dust collecting and removing apparatus for gases containing dust as provided in a coal charging car may be completely introduced into the duct, may have dust well removed with the dust removing apparatus connected with the main duct and may be discharged into the atmosphere as a very clean gas.
Inventors
- 👤 M Ikeda
- 👤 M Sugimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:23
CPC Classifications
C; C10; C10B; C10B27/00; C10B27/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
129 words
The combination of claim 1 wherein said stationary duct means comprises a plurality of sub-ducts arranged end to end along the path of said car and each including at least two of said plurality of inlet ports, a main duct leading to said stationary dust-removal means, a plurality of connecting ducts each joining a sub-duct to said main duct, a valve in each of said connecting ducts and control means actuated by the presence of the car at a predetermined station for positively opening the valve in the connecting duct leading to the sub-duct containing the inlet port associated with said predetermined station and for positively closing the valve in the other connecting ducts whereby leakage through the plurality of closed valve means at said inlet ports is minimized.
Claim 2
Dependent Claim
66 words
The combination of claim 2 wherein said control means comprises an electrical switch at each of said stations, relay means, a plurality of solenoid operated valves equal to the number of valves in said connecting ducts, a piston-cylinder device for operating each of said connecting duct valves, and a pressurized fluid system controlled by said solenoid activated valves for opening and closing said connectinG duct valves.
Claim 3
Dependent Claim
51 words
The combination of claim 1 wherein said initial gas filter means on said car comprises a rotatably mounted screen through which said dust laden air is collected, water storage means, means for spraying water from said storage means on said screen, and means for storing the dirty water from said screen.
Claim 4
Dependent Claim
36 words
The combination of claim 1 wherein said exhaust port includes means for connecting said exhaust port to any one of said inlet ports and means for simultaneously opening the valve means at the one inlet port.
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |