US3674248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closed end tuyere coil
Assignee: Jones and Laughlin Steel Inc
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Filing: 1970-10-09
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Granted: 1972-07-04
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Expires: 1990-10-09
Abstract
Abstract Tuyeres and like articles employed to deliver fluids in extremely hot environments include an arrangement for their cooling comprising a conduit in the form of a coil having a plurality of turns for passing a cooling fluid through the article at high velocities. The conduit consists of an outer tubular member closed at one end to fluid flow and an inner tubular member located within the outer tubular member so as to form an annular passageway between the members. The tubular members are in fluid communication adjacent the closed end of the outer member. Cooling fluid introduced into the conduit first passes through the conduit along the annular passageway, enters the inner tubular member adjacent the closed end of the outer member, and passes through the inner tubular member to exit from the conduit.
Inventors
- 👤 Donald J Shellenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:27
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
166 words
A tuyere, monkey or like article for use in a metallurgical furnace comprising a coil having a plurality of successive turns maintained in substantial abutment with one another, said coil including an outer tubular member closed at one end to fluid flow and an inner tubular member positioned within the outer tubular member, at least the outer tubular member being constructed of a material of high thermal conductivity, said tubular members cooperating to form an annular conduit passageway between them, said inner tubular member forming a central conduit passageway, the ratio of the cross-sectional area of the central conduit passageway to the cross-sectional area of the annular conduit passageway being at least about 2 to 1 and the annular conduit passageway and the central conduit passageway being in fluid communication adjacent the closed end of the outer tubular member, and flange means made of a material of high thermal conductivity secured to one end of said coil for positioning and retaining the coil in said furnace.
Claim 2
Dependent Claim
166 words
A tuyere, monkey or like article for use in a metallurgical furnace comprising a coil having a plurality of successive turns maintained in substantial abutment with one another, said coil including an outer tubular member closed at one end to fluid flow and an inner tubular member positioned within the outer tubular member, at least the outer tubular member being constructed of a material of high thermal conductivity, said tubular members cooperating to form an annular conduit passageway between them, said inner tubular member forming a central conduit passageway, the ratio of the cross-sectional area of the central conduit passageway to the cross-sectional area of the annular conduit passageway being at least about 2 to 1 and the annular conduit passageway and the central conduit passageway being in fluid communication adjacent the closed end of the outer tubular member, and flange means made of a material of high thermal conductivity secured to one end of said coil for positioning and retaining the coil in said furnace.
Claim 3
Dependent Claim
26 words
The article of claim 1 wherein the material of high thermal conductivity is one selected from the group consisting of copper, copper alloys and aluminum alloys.
Claim 4
Dependent Claim
34 words
The article of claim 1 wherein the entire coil is encased in a shell of a material of high thermal conductivity, said outer tubular member being in good heat conducting contact with the sheLl.
Claim 5
Dependent Claim
26 words
The article of claim 2 wherein the material of high thermal conductivity is one selected from the group consisting of copper, copper alloys and aluminum alloys.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |