US3574506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blow torch burner
Assignee: Newell Companies Inc
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Filing: 1968-07-29
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Granted: 1971-04-13
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Expires: 1988-07-29
Abstract
Abstract A blowtorch 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 slow 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
2026-10-26 08:20
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/62; F23D14/64; F04; F04F; F04F5/00; F04F5/44; F04F5/46; F04F5/466; F23D14/28; F23D2206/00; F23D2206/0031; F23D2206/0036
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
165 words
A blowtorch 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 positioned in said sleeve adjacent to said diffuser outlet whereby the velocity of gas flowing through said gas conduit and out of said gas flow orifice is substantially increased by said jet pump so that a high velocity gas stream flows from said jet pump into said cylindrical sleeve.
Claim 2
Dependent Claim
165 words
A blowtorch 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 positioned in said sleeve adjacent to said diffuser outlet whereby the velocity of gas flowing through said gas conduit and out of said gas flow orifice is substantially increased by said jet pump so that a high velocity gas stream flows from said jet pump into said cylindrical sleeve.
Claim 3
Dependent Claim
31 words
A blowtorch burner according to claim 1 in which said flame holder is coaxially positioned within said cylindrical sleeve and has longitudinally extending fluted peripheral ribs defining gas flow passages therebetween.
Claim 4
Dependent Claim
61 words
A blowtorch burner according to claim 1 in which said flame holder is axially positioned within said cylindrical sleeve, defines a central axial gas flow passage therethrough and peripheral gas flow passages distributed about its circumference, said peripheral gas flow passages having a greater cross-sectional area at their exit than their inlet end, to provide a mantle of slower moving gas.
Claim 5
Dependent Claim
42 words
A blowtorch burner according to claim 3 in which said flame holder is in the form of a cylindrical tube coaxially positioned within said cylindrical cylinder and having longitudinally extending fluted ribs surrounding its periphery, defining said peripheral gas flow passages therebetween.
Claim 6
Dependent Claim
28 words
A blowtorch burner according to claim 4 in which said flame holder has fluted ribs at each end thereof and defines an annular mixing chamber between said ribs.
Claim 7
Dependent Claim
60 words
A blowtorch burner according to claim 5 in which said cylindrical sleeve has an annular inner shoulder and in which said fluted ribs at the end of said flame holder adjacent said jet pump are of shorter radial length than the fluted ribs at the other end of said flame holder, and are pressed in contact with said annular shoulder.
Claim 8
Dependent Claim
45 words
A blowtorch burner according to claim 6 in which said gas flow orifice is defined through a gas spud positioned at the end of said gas conduit and extending into the inlet section of said diffuser, with said air inlet ports peripherally surrounding the same.
Claim 9
Dependent Claim
34 words
A blowtorch burner according to claim 1 in which said gas conduit is mounted on a tap connection for a disposable LP cylinder, said tap connection being provided with a shutoff and flow-adjustment valve.
Claim 10
Dependent Claim
28 words
A blowtorch burner according to claim 1 in which the outlet section of said cylindrical sleeve has an enlarged inner diameter with respect to the inlet section thereof.
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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |