Patent US3768962A successfully refreshed from Google Patents.
US3768962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas torch
Assignee: Individual
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Filing: 1972-10-02
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Granted: 1973-10-30
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Expires: 1992-10-02
Abstract
Abstract Stoichiometric gas-and-air combinations promoting optimum hightemperature and centered burning in a propane torch or the like are promoted by an air-admitting base member which fixedly mounts a gas nozzle and cooperating venturi in a critical highly-precise spaced concentric alignment which is readily achieved by way of concentrically machined nozzle and venturi seats into which the nozzle and venturi are separately forced into a predetermined centered relationship via alignment-inducing seating surfaces.
Inventors
- 👤 F Baranowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:28
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/62; F23D14/64; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87571; Y10T137/87587
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
199 words
A gas torch including a nozzle having a minute orifice therethrough and a peripheral substantially annular seating surface in concentric alignment with said orifice, a venturi tube having a central passageway which is of relatively small diameter at an upstream end and of outwardly flaring relatively larger diameters downstream thereof, a substantially tubular base member mounting said nozzle and venturi in spaced axial alignment, said base member having a first circularly generated annular seat surface and a second substantially concially shaped annular seat surface concentric with and spaced axially from said first seat surface, said base further having means for admitting gas laterally into the space between said seat surfaces, said venturi tube having an exterior substantially conical seating surface thereon shaped to mate with said second surface, means forcing said conical seating surface of said venturi into mated selfcentered relation with said second surface and holding said venturi tube in fixed relation with said base member, said nozzle seating surface being mated with said first seat surface, and means holding said nozzle in fixed relation with said base member with a downstream end of said nozzle orifice in spaced relation to an upstream end of said venturi tube.
Claim 2
Dependent Claim
199 words
A gas torch including a nozzle having a minute orifice therethrough and a peripheral substantially annular seating surface in concentric alignment with said orifice, a venturi tube having a central passageway which is of relatively small diameter at an upstream end and of outwardly flaring relatively larger diameters downstream thereof, a substantially tubular base member mounting said nozzle and venturi in spaced axial alignment, said base member having a first circularly generated annular seat surface and a second substantially concially shaped annular seat surface concentric with and spaced axially from said first seat surface, said base further having means for admitting gas laterally into the space between said seat surfaces, said venturi tube having an exterior substantially conical seating surface thereon shaped to mate with said second surface, means forcing said conical seating surface of said venturi into mated selfcentered relation with said second surface and holding said venturi tube in fixed relation with said base member, said nozzle seating surface being mated with said first seat surface, and means holding said nozzle in fixed relation with said base member with a downstream end of said nozzle orifice in spaced relation to an upstream end of said venturi tube.
Claim 3
Dependent Claim
82 words
A gas torch as set forth in claim 1 wherein said base member has lateral orifices admitting air into the space between a downstream end of said nozzle and an upstream end of said venturi tube, and further including an inlet tube for connecting a combustible gas under pressure into said tubular base member at an end upstream of said nozzle, and a flame tube connected with said tubular base member and directing gas-air mixtures downstream thereof and of said venturi tube.
Claim 4
Dependent Claim
89 words
A gas torch as set forth in claim 2 wherein said first surface is nearer the upstream end of said base member and is a substantially cylindrical surface, wherein said peripheral seating surface of said nozzle has a substantially spherical rounding and is of a maximum diameter about a few thousandths of an inch larger than that of said cylindrical surface, whereby said peripheral and cylindrical surfaces interfere and said nozzle is thereby tightly fitted with said base when said nozzle peripheral surface is press-fitted to said cylindrical surface.
Claim 5
Dependent Claim
59 words
A gas torch as set forth in claim 2 wherein said conical seating surface in said venturi tube is on the upstream side of an external shoulder of said venturi tube, and wherein said means forcing and holding said venturi tube in fixed relation with said base member is in abutting relation to the downstream side of said shoulder.
Claim 6
Dependent Claim
89 words
A gas torch as set forth in claim 3 wherein said first surface is of smaller diameter than said second surface and said second annular seat surface has an inner diameter larger than the outer diameter of said first surface, thereby accommodating tooling for the machining of said first surface and for fitting of said nozzle with said first surface through space within said second annular seat surface, said second annular seat surface being nearer the downstream end of said base member and flaring outwardly in the downstream direction.
Claim 7
Dependent Claim
58 words
A gas torch as set forth in claim 5 further including a first substantially planar annular surface at the upstream end of said first surface and substantially normal to the central axis of said first surface, and a second substantially planar annular surface at the upstream end of said nozzle disposed to bottom against said first planar surface.
Claim 8
Dependent Claim
46 words
A gas torch as set forth in claim 2 wherein said first surface is nearer the upstream end of said base member and is substantially conical, and wherein said peripheral seating surface of said nozzle is substantially conical and slopEd to mate with said first surface.
Claim 9
Dependent Claim
40 words
A gas torch as set forth in claim 7 wherein said first surface and said nozzle surface flare outwardly in the upstream direction with reference to said base member, and wherein said second surface flares outwardly in the downstream direction.
References Cited (Backward Citations)
US1197721A
Cited
US3663154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |