US3740930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrugated balloon flue
Assignee: Individual
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Filing: 1971-04-28
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Granted: 1973-06-26
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Expires: 1991-04-28
Abstract
Abstract A plurality of standardized flue sections or modules of double wall construction are assembled together to form a complete flue assembly for hot smelter gases. Each flue section comprises a pair of generally annular end flanges spaced a predetermined standard distance apart, an inner wall of corrugated corrosion resistant sheet metal extending between and secured to the facing surfaces of the two end flanges, an outer wall of corrugated sheet metal also secured to the end flanges and spaced a predetermined distance radially outwardly of the corrugated inner wall, and means for connecting the end flanges of one flue section to the abutting end flanges of adjoining flue sections.
Inventors
- 👤 J Cullom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:28
CPC Classifications
F; F23; F23J; F23J11/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
225 words
A balloon flue for hot smelter gases which comprises a plurality of standardized flue sections assembled together to form the complete flue assembly, each flue section comprising a pair of generally annular end flanges for said flue section spaced a predetermined standard distance apart, the inner periphery of each flange conforming generally to the periphery of the transverse cross section of the flue, a perimetric inner wall of substantially parallel and transversely corrugated corrosion resistant sheet metal extending between and secured to the facing surfaces of the two end flanges adjacent the inner periphery thereof, said corrugated inner wall defining the gas-tight flue gas conduit of the flue section, a perimetric outer wall of substantially parallel and transversely corrugated sheet metal extending between and secured to the facing surfaces of the two end flanges, said corrugated outer wall being spaced a predetermined distance radially outwardly of the corrugated inner wall of said flue section so that said spaced inner and outer walls define an annular space that extends from one end flange to the other end flange of said flue section, the lowermost portion of said corrugated outer wall being formed with an opening so that said annular space is open to the atmosphere thereat, and means for connecting the end flanges of one flue section to the abutting end flanges of adjoining flue sections.
Claim 2
Dependent Claim
225 words
A balloon flue for hot smelter gases which comprises a plurality of standardized flue sections assembled together to form the complete flue assembly, each flue section comprising a pair of generally annular end flanges for said flue section spaced a predetermined standard distance apart, the inner periphery of each flange conforming generally to the periphery of the transverse cross section of the flue, a perimetric inner wall of substantially parallel and transversely corrugated corrosion resistant sheet metal extending between and secured to the facing surfaces of the two end flanges adjacent the inner periphery thereof, said corrugated inner wall defining the gas-tight flue gas conduit of the flue section, a perimetric outer wall of substantially parallel and transversely corrugated sheet metal extending between and secured to the facing surfaces of the two end flanges, said corrugated outer wall being spaced a predetermined distance radially outwardly of the corrugated inner wall of said flue section so that said spaced inner and outer walls define an annular space that extends from one end flange to the other end flange of said flue section, the lowermost portion of said corrugated outer wall being formed with an opening so that said annular space is open to the atmosphere thereat, and means for connecting the end flanges of one flue section to the abutting end flanges of adjoining flue sections.
Claim 3
Dependent Claim
34 words
The flue assembly according to claim 1 in which each flue section is provided with means for collecting and removing the dust that settles out of the hot smelter gases passing through the flue.
Claim 4
Dependent Claim
60 words
The flue assembly according to claim 2 in which the means for collecting and removing the dust comprises a U-shaped longitudinal trough disposed at the lowest point of the flue cross section defined by the inner wall of the flue section, dust conveyor means being disposed in said trough for conveying the dust collected therein to a dust discharge means.
Claim 5
Dependent Claim
69 words
The flue assembly according to claim 1 in which the outer wall of at least one of the flue sections is provided with vent means that communicates with the interior of the annular space between the inner and outer walls of the flue section, said vent means being disposed adjacent the uppermost point of said outer wall and being adjustable to control the flow of air through said vent.
Claim 6
Dependent Claim
144 words
The flue assembly according to claim 1 in which the upper portion of at least one of the flue sections has a semi-cylindrical configuration and the lower portion of said flue section has a truncated V-shaped configuration so that the transverse cross section of said flue section has a balloon-shaped configuration, the lowermost longitudinal edges of the inner wall of the flue section being connected to a longitudinal dust-collecting trough which forms the closure for the bottom of the inner wall of said flue section, and the lowermost longitudinal edges of the outer wall of said balloon flue section terminating radially outwardly of said bottom closure of the inner wall of the flue section so that the annular space between the inner and outer walls of the flue Section is open to the atmosphere adjacent the lower longitudinal edges of the outer wall thereof.
Claim 7
Dependent Claim
32 words
The balloon flue according to claim 5 in which said flue section is provided with adjustable vent means disposed on the outer wall of said flue section adjacent the uppermost point thereof.
Claim 8
Dependent Claim
20 words
The flue assembly according to claim 1 in which the corrugated inner wall is formed of heat stabilized stainless steel.
Claim 9
Dependent Claim
20 words
The flue assembly according to claim 1 in which the corrugated outer wall is formed of stainless steel or aluminum.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |