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Patent US3663154A successfully refreshed from Google Patents.
US3663154A
Expired / Lapsed
US
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Blow torch burner
Assignee: Newell Companies Inc
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Filing: 1970-06-24
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Granted: 1972-05-16
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Expires: 1990-06-24
Abstract
Abstract A blow torch burner having a section formed as a jet pump which leads into a cylindrical sleeve provided with a flame holder. A gas conduit with a gas flow orifice leads into the inlet section of the jet pump, which is provided with peripheral air inlet ports, the orifice constituting the nozzle of the pump. The flame holder in connection with the construction producing a penciltype flame has a central axial passage and a peripheral gas flow passage with a greater cross-sectional area at its exit than at its inlet in order to provide a mantle of slower moving gas. In connection with a utility-type flame, the flame holder has a central diverter with peripheral gas flow passages extending therearound.
Inventors
- 👤 Joseph K Locke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:10
CPC Classifications
F; F04; F04F; F04F5/00; F04F5/44; F04F5/46; F04F5/466; F23; F23D; F23D99/00; F23D99/002; F23D99/004; F23D2206/00; F23D2206/0031; F23D2206/0036
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
146 words
A blow torch burner comprising a jet pump having a diffuser with an inlet section provided with peripheral air inlet ports that reduces in diameter to a central mixing tube having a diameter no larger than the reduced diameter of said inlet section and a diffuser outlet that substantially progressively increases in diameter from said mixing tube, a gas conduit with a gas flow orifice leading into said inlet section, said orifice constituting a nozzle for said jet pump, a cylindrical sleeve forming an extension of said diffuser outlet and defining a flame shield at its outlet section, said cylindrical sleeve having a greater inner diameter than the diameter of said diffuser outlet and a flame holder axially positioned in said sleeve adjacent to said diffuser outlet, said flame holder being imperforate in its central portion and defining peripheral gas flow passages distributed about its circumference.
Claim 2
Dependent Claim
146 words
A blow torch burner comprising a jet pump having a diffuser with an inlet section provided with peripheral air inlet ports that reduces in diameter to a central mixing tube having a diameter no larger than the reduced diameter of said inlet section and a diffuser outlet that substantially progressively increases in diameter from said mixing tube, a gas conduit with a gas flow orifice leading into said inlet section, said orifice constituting a nozzle for said jet pump, a cylindrical sleeve forming an extension of said diffuser outlet and defining a flame shield at its outlet section, said cylindrical sleeve having a greater inner diameter than the diameter of said diffuser outlet and a flame holder axially positioned in said sleeve adjacent to said diffuser outlet, said flame holder being imperforate in its central portion and defining peripheral gas flow passages distributed about its circumference.
Claim 3
Dependent Claim
25 words
A blow torch burner according to claim 1 in which said flame holder has longitudinally extending fluted ribs with said gas flow passages defined therebetween.
Claim 4
Dependent Claim
24 words
A blow torch burner according to claim 2 including a conically shaped diverter positioned at the outlet end of said peripheral gas flow passages.
Claim 5
Dependent Claim
27 words
A blow torch burner according to claim 3 in which said cylindrical sleeve has an initial cylindrical portion of reduced diameter, with said flame holder positioned therein.
Claim 6
Dependent Claim
40 words
A blow torch burner according to claim 3 in which said diverter defines an annular passage of decreasing area between it and the adjacent inner wall of said cylindrical sleeve, said passages decreasing in cross-sectional area in a downstream direction.
Claim 7
Dependent Claim
21 words
A blow torch burner according to claim 5 in which the outlet end of said cylindrical sleeve defines a flame shield.
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |