US3225245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasma jet generator
Assignee: Hitachi Ltd
•
Filing: 1962-12-12
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Granted: 1965-12-21
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Expires: 1982-12-12
Abstract
No abstract record available.
Inventors
- 👤 Takei Sachio
- 👤 Yamamoto Manabu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:39
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/42; H05H1/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A PLASMA JET GENERATOR COMPRISING A HOLLOW ELECTRODE HAVING A NOZZLE PORTION, A ROD-SHAPED ELECTRODE DISPOSED AROUND THE CENTRAL PORTION OF THE SAID HOLLOW ELECTRODE AND POINTED TOWARD THE SAID NOZZLE PORTION, A FIRSTT MEANS FOR CREATING AN ARC DISCHARGE BETWEEN THE TIP OF THE SAID ROD-SHAPED ELECTRODE AND THE INNER WALL SURFACE OF THE SAID HOLLOW ELECTRODE, A SECOND MEANS FOR INTRODUCING A FIRST INACTIVE GAS CURRENT INTO THE SPACE BETWEEN THE SAID TWO ELECTRODES IN THE DIRECTION TOWARD THE SAID NOZZLE PORTION, A THIRD MEANS, POINTED TOWARD THE SAID TIP OF THE SAID ROD-SHAPED ELECTRODE, FOR INTRODUCING A SECOND GAS CURRENT IN A DIRECTION OPPOSITE TO THE SAID FIRST INACTIVE GAS CURRENT SUCH AS TO CAUSE SUPPRESSION OF FLUCTUATION OF THE PATH OF THE SAID ARC DISCHARGE, THEREBY EFFECTING THE MIXTURE OF SAID FIRST WITH SAID SECOND GAS CURRENT TO THE HOTTEST POINT IN THE ARC.
Claim 2
Dependent Claim
148 words
A PLASMA JET GENERATOR COMPRISING A HOLLOW ELECTRODE HAVING A NOZZLE PORTION, A ROD-SHAPED ELECTRODE DISPOSED AROUND THE CENTRAL PORTION OF THE SAID HOLLOW ELECTRODE AND POINTED TOWARD THE SAID NOZZLE PORTION, A FIRSTT MEANS FOR CREATING AN ARC DISCHARGE BETWEEN THE TIP OF THE SAID ROD-SHAPED ELECTRODE AND THE INNER WALL SURFACE OF THE SAID HOLLOW ELECTRODE, A SECOND MEANS FOR INTRODUCING A FIRST INACTIVE GAS CURRENT INTO THE SPACE BETWEEN THE SAID TWO ELECTRODES IN THE DIRECTION TOWARD THE SAID NOZZLE PORTION, A THIRD MEANS, POINTED TOWARD THE SAID TIP OF THE SAID ROD-SHAPED ELECTRODE, FOR INTRODUCING A SECOND GAS CURRENT IN A DIRECTION OPPOSITE TO THE SAID FIRST INACTIVE GAS CURRENT SUCH AS TO CAUSE SUPPRESSION OF FLUCTUATION OF THE PATH OF THE SAID ARC DISCHARGE, THEREBY EFFECTING THE MIXTURE OF SAID FIRST WITH SAID SECOND GAS CURRENT TO THE HOTTEST POINT IN THE ARC.
References Cited (Backward Citations)
US3077108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |