Patent US3243493A successfully refreshed from Google Patents.
US3243493A
Expired / Lapsed
US
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Method and apparatus for induction melting
Assignee: Individual
•
Filing: 1963-06-17
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Granted: 1966-03-29
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Expires: 1983-06-17
Abstract
No abstract record available.
Inventors
- 👤 Rointan F Bunshah
- 👤 Robert S Juntz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:45
CPC Classifications
G; G21; G21C; G21C19/00; G21C19/42; G21C19/44; G21C19/48; H; H05; H05B; H05B6/00; H05B6/02; H05B6/22; H05B6/32; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y02W; Y02W30/00; Y02W30/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
IN A PROCESS FOR MELTING METALS BY INDUCTION HEATING, THE STEPS COMPRISING, (A) DISPOSING A METAL TO BE MELTED ON A COOLED SUPPORTING MEMBER, (B) PLACING SAID METAL AND SAID SUPPORTING MEMBER WITHIN AN INERT ENVIRONMENT, (C) SURROUNDING SAID METAL WITH AN INDUCTION HEATING COIL, (D) DISPOSING A COOLED TUBULAR SHIELD PROVIDED WITH MEANS FOR REGULATING THE TEMPERATURE THEREOF IN SPACED RELATION BETWEEN SAID METAL AND SAID HEATING COIL, SAID SHIELD BEING PROVIDED WITH AT LEAST ONE GENERALLY LONGITUDINAL SLIT EXTENDING THE FULL LENGTH DIMENSION THEREOF, (E) PASSING CURRENT THROUGH SAID COIL TO INDUCTIVELY HEAT SAID METAL TO ITS MELTING POINT, (F) ADJUSTING THE CURRENT FLOWING WITHIN SAID COIL SUCH THAT THE MOLTEN METAL IS DRAWN UP SUBSTANTIALLY IN THE FORM OF A CONE, THE BASE OF SAID CONE BEING SUPPORTED BY SAID COOLED SUPPORTING MEMBER, AND THE LATERAL SURFACE OF SAID CONE BEING CONSTRAINED AND SUPPORTED BY THE MAGNETIC FIELD WITHIN SAID HEATING COIL, (G) AND COOLING AND RECOVERING SAID METAL.
Claim 2
Dependent Claim
162 words
IN A PROCESS FOR MELTING METALS BY INDUCTION HEATING, THE STEPS COMPRISING, (A) DISPOSING A METAL TO BE MELTED ON A COOLED SUPPORTING MEMBER, (B) PLACING SAID METAL AND SAID SUPPORTING MEMBER WITHIN AN INERT ENVIRONMENT, (C) SURROUNDING SAID METAL WITH AN INDUCTION HEATING COIL, (D) DISPOSING A COOLED TUBULAR SHIELD PROVIDED WITH MEANS FOR REGULATING THE TEMPERATURE THEREOF IN SPACED RELATION BETWEEN SAID METAL AND SAID HEATING COIL, SAID SHIELD BEING PROVIDED WITH AT LEAST ONE GENERALLY LONGITUDINAL SLIT EXTENDING THE FULL LENGTH DIMENSION THEREOF, (E) PASSING CURRENT THROUGH SAID COIL TO INDUCTIVELY HEAT SAID METAL TO ITS MELTING POINT, (F) ADJUSTING THE CURRENT FLOWING WITHIN SAID COIL SUCH THAT THE MOLTEN METAL IS DRAWN UP SUBSTANTIALLY IN THE FORM OF A CONE, THE BASE OF SAID CONE BEING SUPPORTED BY SAID COOLED SUPPORTING MEMBER, AND THE LATERAL SURFACE OF SAID CONE BEING CONSTRAINED AND SUPPORTED BY THE MAGNETIC FIELD WITHIN SAID HEATING COIL, (G) AND COOLING AND RECOVERING SAID METAL.
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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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |