US4414672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasma-arc furnace
Assignee: INSTITUT ELEKTROSVARKI IMENI EO PATONA AKADEMII NAUK UKRAINSKOI SSR USSR KIEV ULITSA BOZHENKO 11
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Filing: 1981-09-15
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Granted: 1983-11-08
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Expires: 2001-09-15
Abstract
Abstract A plasma-arc furnace comprises a casing with plasma torches, particularly ree torches, mounted therewithin in symmetrical relationship relative to the vertical axis thereof. Each of these torches comprises a body provided with a nozzle and an axial conduit for feeding a plasma-forming gas therethrough, and a cylindrical electrode disposed within said conduit. According to the invention, the distance between the centers of working ends of electrodes disposed within adjacent plasma torches is not more than 15 diameters of the electrode.
Inventors
- 👤 Boris E. Paton
- 👤 Jury V. Latash
- 👤 Oleg S. Zabarilo
- 👤 Gary A. Melnik
- 👤 Nikolai I. Zamulo
- 👤 Anatoly A. Zhdanovsky
- 👤 Alfred I. Bukalo
- 👤 Vladimir V. Goncharenko
- 👤 Stanislav S. Ivanchenko
- 👤 Anatoly R. Slobodian
- 👤 Sergei P. Bakumenko
- 👤 Mikhail K. Zakamarkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:28
CPC Classifications
H; H05; H05B; H05B7/00; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A plasma-arc furnace comprising: a casing, and a plurality of plasma torches, each comprising a body provided with a nozzle and an axial conduit for feeding a plasma-forming gas, and a cylindrical electrode for connection to a three-phase power supply, said electrode being disposed within said conduit of said body; and being mounted within said casing in symmetrical relationship relative to the vertical axis thereof so that the distance between the centers of working ends of said plurality of electrodes of adjacent said torches is not more than 15 diameters of said electrode.
Claim 2
Dependent Claim
93 words
A plasma-arc furnace comprising: a casing, and a plurality of plasma torches, each comprising a body provided with a nozzle and an axial conduit for feeding a plasma-forming gas, and a cylindrical electrode for connection to a three-phase power supply, said electrode being disposed within said conduit of said body; and being mounted within said casing in symmetrical relationship relative to the vertical axis thereof so that the distance between the centers of working ends of said plurality of electrodes of adjacent said torches is not more than 15 diameters of said electrode.
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) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |