US3883290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the production of hot gases
Assignee: Individual
•
Filing: 1972-11-03
•
Granted: 1975-05-13
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Expires: 1992-11-03
Abstract
Abstract This disclosure relates to an apparatus for producing hot gases which may be advantageously utilized in the shrinking of plastic foils although it is readily useable in other environments. The apparatus utilizes a radial blower which produces an annular twisting current of air within a guide pipe with there being mounted within the interior of the air current means for supplying jets of a fuel gas and ignition means for periodically igniting the jets of fuel gas in a manner wherein ignition of the fuel gas is assured and complete combustion thereof is effected within the apparatus so that the possibility of explosions is eliminated and the hot gases discharging from the apparatus are free of flame. The flow of air currents also provides an insulating boundary layer which maintains the exterior of the apparatus at a temperature only slightly greater than ambient temperature.
Inventors
- 👤 Herbert Windelbandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:46
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0488; Y; Y02; Y02B; Y02B30/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
189 words
Apparatus for the production of hot gases comprising an elongated guide pipe having a longitudinal axis and a discharge opening, a burner disposed concentrically within and relative to said guide pipe, said burner including nozzle means for directing fuel generally radially outwardly of the longitudinal axis, conduit means for connecting said burner nozzle means to a source of combustible fuel, ignition means adjacent said burner for igniting the combustible fuel being discharged from said burner nozzle means, an axial blower disposed concentrically within and relative to said guide pipe for creating a swirling air stream through said guide pipe toward said discharge opening, said swirling air stream including low volume air flow along said longitudinal axis and higher volume air flow radially outwardly therefrom, said burner and ignition means being disposed between said blower and said discharge opening, and said ignition means being disposed within said area of low volume flow whereby fuel directed radially outwardly of said nozzle means toward said guide pipe when ignited creates flames directed radially outwardly from said burner into the swirling air stream created by said blower for discharge through said discharge opening.
Claim 2
Dependent Claim
189 words
Apparatus for the production of hot gases comprising an elongated guide pipe having a longitudinal axis and a discharge opening, a burner disposed concentrically within and relative to said guide pipe, said burner including nozzle means for directing fuel generally radially outwardly of the longitudinal axis, conduit means for connecting said burner nozzle means to a source of combustible fuel, ignition means adjacent said burner for igniting the combustible fuel being discharged from said burner nozzle means, an axial blower disposed concentrically within and relative to said guide pipe for creating a swirling air stream through said guide pipe toward said discharge opening, said swirling air stream including low volume air flow along said longitudinal axis and higher volume air flow radially outwardly therefrom, said burner and ignition means being disposed between said blower and said discharge opening, and said ignition means being disposed within said area of low volume flow whereby fuel directed radially outwardly of said nozzle means toward said guide pipe when ignited creates flames directed radially outwardly from said burner into the swirling air stream created by said blower for discharge through said discharge opening.
Claim 3
Dependent Claim
75 words
The apparatus as Defined in claim 1 wherein said ignition means includes electrode pin means for igniting the combustible fuel being discharged from said burner nozzle means, means for creating an ignition spark through said electrode pin means for igniting the combustible fuel within said area of low volume flow, electromagnetic valve means for opening and closing said conduit means, and electrical circuit means which includes said electromagnetic valve means and said electrode pin means.
Claim 4
Dependent Claim
17 words
The apparatus as defined in claim 1 including a generally cylindrical shroud surrounding said elongated guide pipe.
Claim 5
Dependent Claim
76 words
The apparatus as defined in claim 1 including a generally cylindrical shroud surrounding said elongated guide pipe, said shroud being at least in part in spaced relationship to said elongated guide pipe, and aperture means in said shroud adjacent the discharge opening of said elongated guide pipe for drawing air therethrough by said axial blower between said shroud and said elongated guide pipe whereby said shroud is maintained relatively cool during the operation of said apparatus.
Claim 6
Dependent Claim
42 words
The apparatus as defined in claim 1 wherein a generally circular disk is disposed within said elongated guide pipe between said axial blower and said burner for assisting in the creation of the low volume air flow of said swirling air stream.
Claim 7
Dependent Claim
44 words
The apparatus as defined in claim 1 including a pair of generally circular disks disposed concentrically within said guide pipe, one adjacent said axial blower and one remote therefrom for assisting in the formation of the low volume air flow of said air stream.
Claim 8
Dependent Claim
21 words
The apparatus as defined in claim 1 wherein said nozzle means include a plurality of generally radially outwardly directed nozzle openings.
Claim 9
Dependent Claim
21 words
The apparatus as defined in claim 2 wherein said nozzle means include a plurality of generally radially outwardly directed nozzle openings.
Claim 10
Dependent Claim
76 words
The apparatus as defined in claim 2 including a generally cylindrical shroud surrounding said elongated guide pipe, said shroud being at least in part in spaced relationship to said elongated guide pipe, and aperture means in said shroud adjacent the discharge opening of said elongated guide pipe for drawing air therethrough by said axial blower between said shroud and said elongated guide pipe whereby said shroud is maintained relatively cool during the operation of said apparatus.
Claim 11
Dependent Claim
42 words
The apparatus as defined in claim 2 wherein a generally circular disk is disposed within said elongated guide pipe between said axial blower and said burner for assisting in the creation of the low volume air flow of said swirling air stream.
Claim 12
Dependent Claim
42 words
The apparatus as defined in claim 4 wherein a generally circular disk is disposed within said elongated guide pipe between said axial blower and said burner for assisting in the creation of the low volume air flow of said swirling air stream.
Claim 13
Dependent Claim
21 words
The apparatus as defined in claim 4 wherein said nozzle means include a plurality of generally radially outwardly directed nozzle openings.
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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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |