US3594609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasma generator with magnetic focussing and with additional admission of gas
Assignee: Ministerul Industriei Constructiilor de Masini
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Filing: 1968-04-16
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Granted: 1971-07-20
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Expires: 1988-04-16
Abstract
Abstract This invention relates to a plasma arc generator, operating with a DC or AC supply and having improved characteristics by virtue of arrangements for rotating the arc and the injected gas, which may be air or nitrogen for example. The plasma arc generator, is suitable for cutting, welding, built-up welding, (i.e. welding, in which a deposit of metals is built-up), metallizing and promoting chemical reactions.
Inventors
- 👤 Alexandru Vas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:11
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/16; B05B7/22; B05B7/222; B05B7/226; B23; B23K; B23K10/00; H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/34; H05H1/40
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
164 words
A plasma arc generator comprising a nozzle (2) forming a frustoconical nozzle chamber converging in the direction of a nozzle mouth from which a plasma emerges; means (6a ) for feeding an ionizable gas (Qp) into said chamber and along the exterior of said nozzle and therearound; and electrode (1) extending into said chamber; current supply means connected across said nozzle and said electrode for striking an arc within said chamber; and an electromagnetic coil (10) surrounding said nozzle and connected in series with said current supply means, said electrode and said nozzle for traverse by the entire current of said arc, and a ferromagnetic core (11) surrounding said nozzle and cooperating with said coil for generating a magnetic field causing the plasma issuing from said nozzle to rotate about the axis thereof; and a second electromagnetic coil (8) and a second ferromagnetic core (9) coaxial with said nozzle, said coils and said cores generating within said chamber a low-pressure zone around said electrode.
Claim 2
Dependent Claim
164 words
A plasma arc generator comprising a nozzle (2) forming a frustoconical nozzle chamber converging in the direction of a nozzle mouth from which a plasma emerges; means (6a ) for feeding an ionizable gas (Qp) into said chamber and along the exterior of said nozzle and therearound; and electrode (1) extending into said chamber; current supply means connected across said nozzle and said electrode for striking an arc within said chamber; and an electromagnetic coil (10) surrounding said nozzle and connected in series with said current supply means, said electrode and said nozzle for traverse by the entire current of said arc, and a ferromagnetic core (11) surrounding said nozzle and cooperating with said coil for generating a magnetic field causing the plasma issuing from said nozzle to rotate about the axis thereof; and a second electromagnetic coil (8) and a second ferromagnetic core (9) coaxial with said nozzle, said coils and said cores generating within said chamber a low-pressure zone around said electrode.
Claim 3
Dependent Claim
61 words
The plasma arc generator defined in claim 1, further comprising means for evacuating a portion of the gas from said chamber immediately around said electrode, and helical channels (b) formed in the space between said electrode and the body of said nozzle communicating with the last mentioned means, and a sleeve surrounding said electrode and communicating with said chamber and channels.
Claim 4
Dependent Claim
15 words
The plasma arc generator defined in claim 2 wherein the last-mentioned means includes an ejector.
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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |