US3595480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen-fuel-blowing multihole nozzle
Assignee: JFE Engineering Corp
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Filing: 1968-11-29
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Granted: 1971-07-27
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Expires: 1988-11-29
Abstract
Abstract A multinozzle lance in which a central fuel pipe is surrounded by an outer pipe through which an oxygen containing gas is fed under pressure. A plurality of angularly displaced nozzles extend downwardly and outwardly inclined from the lower end of the outer pipe and the lower end of the central pipe communicates with the nozzle through fuel passages having axes extending transverse to the respective nozzle axis. Each of the nozzles has intermediate its ends a throat portion and flares outwardly to opposite sides of the throat portion, and each of the fuel passages communicates with the respective nozzle downstream of the throat portion thereof.
Inventors
- 👤 Kazuo Kunioka
- 👤 Takeshi Tada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:01
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/4606; B; B01; B01J; B01J4/00; B01J4/001; B01J4/002; B01J2204/00; B01J2204/007
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
198 words
A multinozzle lance comprising a first pipe having an axis, a lower closed end and an upper end adapted to be connected to a supply of an oxygen-containing gas under pressure; a plurality of nozzles communicating with said closed end of said first pipe, said nozzles being angularly displaced from each other about the axis of said first pipe and each having an axis extending downwardly and outwardly inclined to said axis of said first pipe from the closed end of the latter, each of said nozzles having a cylindrical throat portion intermediate opposite ends thereof and flares from said throat portion outwardly toward said opposite ends; a second pipe extending through said first pipe and having a closed end in the region of said closed end of said first pipe and an opposite end adapted to be connected to a supply of fuel fluid; and a plurality of fluid passages communicating with said second pipe in the region of the closed end thereof and with said nozzles, respectively, downstream of the respective throat portions, but upstream of the outer ends thereof, each of said passages having an axis extending transverse to the axis of the respective nozzle.
Claim 2
Dependent Claim
198 words
A multinozzle lance comprising a first pipe having an axis, a lower closed end and an upper end adapted to be connected to a supply of an oxygen-containing gas under pressure; a plurality of nozzles communicating with said closed end of said first pipe, said nozzles being angularly displaced from each other about the axis of said first pipe and each having an axis extending downwardly and outwardly inclined to said axis of said first pipe from the closed end of the latter, each of said nozzles having a cylindrical throat portion intermediate opposite ends thereof and flares from said throat portion outwardly toward said opposite ends; a second pipe extending through said first pipe and having a closed end in the region of said closed end of said first pipe and an opposite end adapted to be connected to a supply of fuel fluid; and a plurality of fluid passages communicating with said second pipe in the region of the closed end thereof and with said nozzles, respectively, downstream of the respective throat portions, but upstream of the outer ends thereof, each of said passages having an axis extending transverse to the axis of the respective nozzle.
Claim 3
Dependent Claim
24 words
A multinozzle lance as defined in claim 1, and including water jacket means surrounding said nozzles and at least part of said first pipe.
Claim 4
Dependent Claim
152 words
A multinozzle lance as defined in claim 2, wherein said water jacket comprises an inner jacket substantially concentrically arranged about and extending from said closed end of said first pipe over a major portion of the latter and forming between the inner surface of said inner jacket and the outer surface of said first pipe a first elongated cooling chamber of annular cross section, an outer jacket surrounding said inner jacket and forming therewith a second cooling chamber of annular cross section communicating with said interior of said first cooling chamber in the region of said closed end of said first pipe, cooling fluid inlet means communicating with the interior of said first cooling chamber in the region of the latter opposite from said closeD end of said first pipe, and cooling fluid outlet means communicating with the interior of said second cooling chamber in the region of said fluid inlet means.
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |