US3811029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasmatrons of steel-melting plasmaarc furnaces
Assignee: Individual
•
Filing: 1972-02-17
•
Granted: 1974-05-14
•
Expires: 1992-02-17
Abstract
Abstract The plasmatron has a device used for supplying coolant to the nozzle, which device is essentially a flange with ducts, secured in the upper portion of the plasmatron, the ducts communicating with an interior space in the nozzle by means of pipes passed inside the housing of the plasmatron and rigidly connected by their end portions to the flange and to the nozzle. The plasmatron is provided with a device for radial adjustment of the cathode relative to the nozzle, the adjustment device being mounted on the pipes inside the housing.
Inventors
- 👤 V Malinovsky
- 👤 G Meerson
- 👤 L Maltsev
- 👤 L Panycheva
- 👤 V Averyanov
- 👤 N Bortnichuk
- 👤 V Garanov
- 👤 M Krutyansky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:18
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/34; H05H1/38; H05H1/3478
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
193 words
A plasmatron for melting metal, comprising a housing, an elongated electric holder supported in the housing so that it can be displaced in axial direction inside said housing, a cathode secured to said electric holder at one end thereof, a nozzle inserted in said housing and having a through hole for receiving the cathode therein, means for supplying cooland to said nozzle to cool the same and including a flange mounted on said housing and having ducts for flow of coolant therein, and at least two pipes extending freely inside said housing and having one end portion rigidly secured to said flange and an opposite end portion rigidly secured to said nozzle, said ducts of the flange being in communication with said nozzle via said pipes, and means mounted on said pipes and engaging said holder for radially adjusting said holder relative to said pipes and thereby said cathode relative to the hole in said nozzle including a ring secured to said pipes, said holder extending freely in said housing and said ring surrounding said holder, and adjustment means engaging said ring and said holder for adjusting the radial position of the cathode.
Claim 2
Dependent Claim
193 words
A plasmatron for melting metal, comprising a housing, an elongated electric holder supported in the housing so that it can be displaced in axial direction inside said housing, a cathode secured to said electric holder at one end thereof, a nozzle inserted in said housing and having a through hole for receiving the cathode therein, means for supplying cooland to said nozzle to cool the same and including a flange mounted on said housing and having ducts for flow of coolant therein, and at least two pipes extending freely inside said housing and having one end portion rigidly secured to said flange and an opposite end portion rigidly secured to said nozzle, said ducts of the flange being in communication with said nozzle via said pipes, and means mounted on said pipes and engaging said holder for radially adjusting said holder relative to said pipes and thereby said cathode relative to the hole in said nozzle including a ring secured to said pipes, said holder extending freely in said housing and said ring surrounding said holder, and adjustment means engaging said ring and said holder for adjusting the radial position of the cathode.
Claim 3
Dependent Claim
36 words
A plasmatron as claimed in claim 1 wherein said flange, said pipes, said adjusting means and said nozzle form a single unit, said adjusting means being located at that end of the holder adjacent said nozzle.
Claim 4
Dependent Claim
17 words
A plasmatron as claimed in claim 1 wherein said adjustment means comprises screws threaded in said ring.
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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) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |