Patent US4025391A successfully refreshed from Google Patents.
US3685740A
Expired / Lapsed
US
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Rocket burner with flame pattern control
Assignee: Airco Inc
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Filing: 1969-10-29
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Granted: 1972-08-22
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Expires: 1989-10-29
Abstract
Abstract An oxygen-fuel burner of the rocker burner type comprising a cylindrical combustion chamber having an open discharge end and a burner plate with separate oxygen and fuel ports constituting the opposite end of the chamber; the projected longitudinal axes of the oxygen ports extending in converging directions towards the longitudinal axis of the chamber but in off-set, non-intersecting relation thereto, so that points on the respective axis that most closely approach the chamber axis define a transversely positioned plane between the burner plate and the chamber exhaust; the projected longitudinal axes of the fuel ports being substantially parallel to the chamber axis for mixing of oxygen and fuel at and beyond the plane of closest approach, and means for adjusting the longitudinal position of the burner plate on the chamber axis and thereby locating the plane of closet approach in relation to the chamber exhaust for determining the pattern of the burner discharge flames.
Inventors
- 👤 Thomas L Shepherd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:41
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/72; F23D14/78; F02; F02K; F02K9/00; F02K9/42; F02K9/44; F02K9/52; F23D14/32
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
172 words
An oxygen-fuel burner of the rocket-burner type having a combustion chamber wherein a plurality of oxygen and fuel streams are fed into one end of the chamber and the opposite end is open for combustion flame discharge, comprising: a. means for directing separate streams of fuel into the chamber and toward the discharge end, b. means for directing separate streams of oxygen into the chamber for converging flow, the respective projected axes of the oxygen streams being in off-set, non-intersecting relation to the longitudinal axis of the chamber, c. means for directing a comparatively small amount of the fuel flow into the converging oxygen flow for establishing a primary stabilizing combustion region, d. the diverging oxygen flow beyond the primary combustion region traversing and mixing with the main amount of the fuel flow for establishing a secondary combustion region, e. and means for varying the traversing location of the oxygen and fuel with respect to the discharge end of the combustion chamber for controlling the discharge pattern of the secondary combustion flames.
Claim 2
Dependent Claim
172 words
An oxygen-fuel burner of the rocket-burner type having a combustion chamber wherein a plurality of oxygen and fuel streams are fed into one end of the chamber and the opposite end is open for combustion flame discharge, comprising: a. means for directing separate streams of fuel into the chamber and toward the discharge end, b. means for directing separate streams of oxygen into the chamber for converging flow, the respective projected axes of the oxygen streams being in off-set, non-intersecting relation to the longitudinal axis of the chamber, c. means for directing a comparatively small amount of the fuel flow into the converging oxygen flow for establishing a primary stabilizing combustion region, d. the diverging oxygen flow beyond the primary combustion region traversing and mixing with the main amount of the fuel flow for establishing a secondary combustion region, e. and means for varying the traversing location of the oxygen and fuel with respect to the discharge end of the combustion chamber for controlling the discharge pattern of the secondary combustion flames.
Claim 3
Dependent Claim
60 words
An oxygen-fuel burner as specified in claim 1 wherein the oxygen and fuel stream directing means consists of a burner plate having a plurality of ports for the respective streams, and control means produce relative movement between the burner plate and combustion chamber along the longitudinal axis of the chamber for varying the traversing location of the oxygen and fuel.
Claim 4
Dependent Claim
42 words
An oxygen-fuel burner as specified in claim 2 wherein the oxygen ports are radially spaced from the center of the burner plate, and the projected longitudinal axes thereof are inclined in generally converging, non-intersecting relation to the longitudinal axis of the chamber.
Claim 5
Dependent Claim
46 words
An oxygen-fuel burner as specified in claim 2 wherein ports for the main fuel flow are located along the peripheral portion of the burner plate, and ports for the primary fuel are located centrally of the burner plate in general alignment with the primary combustion region.
Claim 6
Dependent Claim
27 words
An oxygen-fuel burner as specified in claim 4 wherein the projected longitudinal axes of the fuel ports are generally parallel to the longitudinal axis of the chamber.
Claim 7
Dependent Claim
39 words
An oxygen-fuel burner as specified in claim 3 wherein the projected longitudinal axes of the oxygen ports at the respective points closest to the chamber axis define a transverse plane determining the location of the primary gas mixing zone.
Claim 8
Dependent Claim
32 words
An oxygen-fuel burner as specified in claim 2 wherein the main fuel streams form a secondary fuel envelope within the combustion chamber in surrounding relation to the oxygen and primary fuel streams.
Claim 9
Dependent Claim
39 words
An oxygen-fuel burner as specified in claim 7 wherein the projected axes of the oxygen ports diverge beyond the primary combustion region toward the side wall of the combustion chamber for traversing and mixing with the enveloping fuel flow.
Claim 10
Dependent Claim
48 words
An oxygen-fuel burner as specified in claim 8 having an adjusted position of the burner plate representing divergence of the oxygen port axes beyond the discharge end of the chamber, wherein a radially expanding flame region is formed for producing short, spreading flames in a generally mushrooming pattern.
Claim 11
Dependent Claim
54 words
An oxygen-fuel burner as specified in claim 8 having an adjusted position of the burner plate representing intersection oF the diverging axes with the chamber side wall in a comparatively long combustion chamber, wherein confined mixing and interaction of the oxygen and fuel streams produce an elongated, needle-type flame discharge from the combustion chamber.
Claim 12
Dependent Claim
151 words
An oxygen-fuel burner of the rocket-burner type having a combustion chamber wherein a plurality of oxygen and fuel streams are fed into one end of the chamber and the opposite end is open for combustion flame discharge, comprising: a. means for directing separate streams of oxygen into the chamber for converging flow, the respective projected axes of the oxygen streams being in off-set, non-intersecting relation to the longitudinal axis of the chamber, b. means for directing a portion of the fuel flow into the converging oxygen flow for establishing a primary stabilizing combustion region remote from the feed end of the chamber, c. and means for directing the main portion of fuel flow along the chamber wall so as to envelop the oxygen streams and primary combustion region, d. the diverging oxygen streams beyond the primary combustion region traversing and mixing with the fuel envelope for establishing a secondary combustion region.
Claim 13
Dependent Claim
151 words
An oxygen-fuel burner of the rocket-burner type having a combustion chamber wherein a plurality of oxygen and fuel streams are fed into one end of the chamber and the opposite end is open for combustion flame discharge, comprising: a. means for directing separate streams of oxygen into the chamber for converging flow, the respective projected axes of the oxygen streams being in off-set, non-intersecting relation to the longitudinal axis of the chamber, b. means for directing a portion of the fuel flow into the converging oxygen flow for establishing a primary stabilizing combustion region remote from the feed end of the chamber, c. and means for directing the main portion of fuel flow along the chamber wall so as to envelop the oxygen streams and primary combustion region, d. the diverging oxygen streams beyond the primary combustion region traversing and mixing with the fuel envelope for establishing a secondary combustion region.
Claim 14
Dependent Claim
129 words
An oxygen-fuel burner comprising housing means having a discharge end for projecting an oxy-fuel flame, a burner element in said housing means, said element including a plurality of fuel gas ports for projecting a plurality of streams of fuel gas from said element, said element further including a plurality of oxygen ports for projecting separate streams of oxygen for converging flow about a longitudinal axis, the respective projected axes of the said oxygen ports being in off-set, non-intersecting relation with respect to the longitudinal axis, certain of the fuel gas ports being positioned centrally with respect to the oxygen ports for establishing with said oxygen streams a primary stabilizing combustion region, other of said fuel gas ports being positioned to form a fuel gas envelope surrounding the oxygen streams.
Claim 15
Dependent Claim
129 words
An oxygen-fuel burner comprising housing means having a discharge end for projecting an oxy-fuel flame, a burner element in said housing means, said element including a plurality of fuel gas ports for projecting a plurality of streams of fuel gas from said element, said element further including a plurality of oxygen ports for projecting separate streams of oxygen for converging flow about a longitudinal axis, the respective projected axes of the said oxygen ports being in off-set, non-intersecting relation with respect to the longitudinal axis, certain of the fuel gas ports being positioned centrally with respect to the oxygen ports for establishing with said oxygen streams a primary stabilizing combustion region, other of said fuel gas ports being positioned to form a fuel gas envelope surrounding the oxygen streams.
Claim 16
Dependent Claim
27 words
A burner as set forth in claim 12, further including means to adjust the position of said burner element relative to the discharge end of the burner.
Claim 17
Dependent Claim
35 words
A burner as set forth in claim 12, wherein the longitudinal axis of each certain fuel gas port intersects with the projected axis of a respective oxygen port for insuring mixing of the respective streams.
Claim 18
Dependent Claim
19 words
A burner as set forth in claim 12, wherein the oxygen ports form a vortex about said longitudinal axis.
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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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |