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US3082314A
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Plasma arc torch
Assignee: Shinmaywa Industries Ltd
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Filing: 1960-04-18
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Granted: 1963-03-19
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Expires: 1980-04-18
Abstract
No abstract record available.
Inventors
- 👤 Arata Yoshiaki
- 👤 Uno Tadao
- 👤 Nakamura Takezo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:33
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/34; H05H1/3452; H05H1/3468
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A PLASMA ARC TORCH COMPRISING A NEGATIVE ROD ELECTRODE, A POSITIVE RING-SHAPED ELECTRODE FORWARD THEREOF, A CONICAL PASSAGE FOR JETTING IN AN ANNULAR FASHION AN INERT FLUID IN THE DIRECTION OF SAID RING-SHAPED ELECTRODE, SAID INERT FLUID BEING JETTED IN A MANNER SUCH AS TO ENVELOP THE PERIPHERY OF SAID ROD ELECTRODE AS WELL AS THE PERIPHERY OF A PLASMA ARC EMITTED FROM SAID ELECTRODE, AN INTERMEDIATE NOZZLE OF A SMALL CROSS-SECTIONAL AREA IN A ROW WITH AND FORWARD OF SAID PASSAGE, AND AN OUTER CHAMBER DISPOSED BETWEEN SAID INTERMEDIATE NOZZLE AND SAID RING-SHAPED ELECTRODE, CHARACTERIZED IN THAT A NONINERT FLUID SELECTED FROM THE GROUP CONSISTING OF AIR AND WATER IS JETTED OUTWARDLY IN AN ANNULAR FASHION BETWEEN SAID PLASMA ARC ENVELOPED BY SAID INERT FLUID AND THE INTERNAL PERIPHERY OF SAID RING-SHAPED ELECTRODE WHILE MAINTAINING THE PRESSURE WITHIN SAID OUTER CHAMBER AT A LOWER PRESSURE THAN THAT OF SAID CONICAL PASSAGE.
Claim 2
Dependent Claim
152 words
A PLASMA ARC TORCH COMPRISING A NEGATIVE ROD ELECTRODE, A POSITIVE RING-SHAPED ELECTRODE FORWARD THEREOF, A CONICAL PASSAGE FOR JETTING IN AN ANNULAR FASHION AN INERT FLUID IN THE DIRECTION OF SAID RING-SHAPED ELECTRODE, SAID INERT FLUID BEING JETTED IN A MANNER SUCH AS TO ENVELOP THE PERIPHERY OF SAID ROD ELECTRODE AS WELL AS THE PERIPHERY OF A PLASMA ARC EMITTED FROM SAID ELECTRODE, AN INTERMEDIATE NOZZLE OF A SMALL CROSS-SECTIONAL AREA IN A ROW WITH AND FORWARD OF SAID PASSAGE, AND AN OUTER CHAMBER DISPOSED BETWEEN SAID INTERMEDIATE NOZZLE AND SAID RING-SHAPED ELECTRODE, CHARACTERIZED IN THAT A NONINERT FLUID SELECTED FROM THE GROUP CONSISTING OF AIR AND WATER IS JETTED OUTWARDLY IN AN ANNULAR FASHION BETWEEN SAID PLASMA ARC ENVELOPED BY SAID INERT FLUID AND THE INTERNAL PERIPHERY OF SAID RING-SHAPED ELECTRODE WHILE MAINTAINING THE PRESSURE WITHIN SAID OUTER CHAMBER AT A LOWER PRESSURE THAN THAT OF SAID CONICAL PASSAGE.
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) | 1966-03-18 | 1966-09-17 | 1967-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-18 | 1970-09-17 | 1971-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-18 | 1974-09-17 | 1975-03-19 | $7700.00 | Window Closed / Lapsed |