US3604376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric furnace ventilation and gas cooling cleaning system
Assignee: STICKER IND SUPPLY CORP
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Filing: 1969-12-16
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Granted: 1971-09-14
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Expires: 1989-12-16
Abstract
Abstract An electric furnace ventilation and gas cooling and cleaning system including a duct system for combusting, cooling and vertically venting dry waste gases from the furnace. There is a lower pivoted cooling duct and an upper fixed cooling duct horizontally and vertically offset to the furnace and the lower pivoted duct. A horizontally disposed duct interconnects the upper fixed duct and lower pivoted duct. A vertically movable duct is located between the furnace and the vertically pivoted duct and the rate of air intake to the vertically movable duct is varied at each end thereof. Each of the ducts is formed of four water-cooled panels joined together at their edges.
Inventors
- 👤 Henry L Meyer
- 👤 Robert B Stofko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 04:52
CPC Classifications
F; F27; F27D; F27D17/00; F27D17/30; F27D17/304; F27D9/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
102 words
In combination with an electric metal refining furnace having an outlet aperture in its upper portion, a duct system for combusting, cooling and vertically venting dry waste gases from said furnace through said aperture, said duct system comprising a lower laterally shiftable cooling duct pivoted about a horizontal axis, a vertically movable duct between said furnace aperture and said laterally shiftable duct, an upper fixed cooling duct, said fixed duct being both horizontally and vertically offset from both said furnace and said lower laterally shiftable duct, and a horizontally disposed duct interconnecting said upper fixed duct and said lower laterally shiftable duct.
Claim 2
Dependent Claim
102 words
In combination with an electric metal refining furnace having an outlet aperture in its upper portion, a duct system for combusting, cooling and vertically venting dry waste gases from said furnace through said aperture, said duct system comprising a lower laterally shiftable cooling duct pivoted about a horizontal axis, a vertically movable duct between said furnace aperture and said laterally shiftable duct, an upper fixed cooling duct, said fixed duct being both horizontally and vertically offset from both said furnace and said lower laterally shiftable duct, and a horizontally disposed duct interconnecting said upper fixed duct and said lower laterally shiftable duct.
Claim 3
Dependent Claim
38 words
In combination with an electric metal refining furnace, a duct system as defined in claim 1, having a mechanical means on at least one end of said vertically movable duct to vary the rate of air intake thereinto.
Claim 4
Dependent Claim
30 words
In combination with an electric metal refining furnace, a duct system as defined in claim 1, in which the walls of all of said ducts are hollow water cooled panels.
References Cited (Backward Citations)
GB877046A
Cited
US3173980A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |