US3291472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drum type induction furnace
Assignee: Inductotherm Linemelt Corp
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Filing: 1961-07-20
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Granted: 1966-12-13
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Expires: 1981-07-20
Abstract
No abstract record available.
Inventors
- 👤 James L Hoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:17
CPC Classifications
F; F27; F27B; F27B7/00; F27B14/00; F27B14/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
A DRUM TYPE INDUCTION FURNACE COMPRISING A DRUM, MEANS SUPPORTING SAID DRUM FOR ROTATION ABOUT A SUBSTANTIALLY HORIZONTAL AXIS, MEANS ASSOCIATED WITH SAID DRUM FOR MELTING METALS WITHIN SAID DRUM, A DISCHARGE CONDUIT HAVING FIRST AND SECOND ENDS, MEANS ROTATABLY CONNECTING SAID FIRST END OF SAID CONDUIT TO AN UPRIGHT END WALL OF SAID DRUM AT A POINT SPACED FROM THE AXIS OF ROTATION OF SAID DRUM, MEANS PROVIDING COMMUNICATION BETWEEN THE INTERIOR OF SAID DRUM AND SAID FIRST END OF SAID CONDUIT, THE LONGITUDINAL AXIS OF SAID CONDUIT EXTENDING AT AN ANGLE WITH RESPECT TO THE LONGITUDINAL AXIS OF SAID DRUM, THE SECOND END OF SAID CONDUIT BEING DISPOSED BELOW SAID FIRST END OF SAID CONDUIT IN ALL ROTATIVE DISPOSITIONS OF SAID DRUM, MEANS SLIDABLY SUPPORTING SAID SECOND END OF SAID CONDUIT, AND MEANS FOR ROTATING SAID DRUM SO THAT SAID FIRST END OF SAID CONDUIT MAY BE DISPOSED BELOW THE LEVEL OF MOLTEN METAL IN SAID DRUM TO EFFECT A DISCHARGE OF MOLTEN METAL IN SAID DRUM THROUGH SAID CONDUIT TO A VESSEL DISPOSED TO ONE SIDE OF SAID DRUM.
Claim 2
Dependent Claim
182 words
A DRUM TYPE INDUCTION FURNACE COMPRISING A DRUM, MEANS SUPPORTING SAID DRUM FOR ROTATION ABOUT A SUBSTANTIALLY HORIZONTAL AXIS, MEANS ASSOCIATED WITH SAID DRUM FOR MELTING METALS WITHIN SAID DRUM, A DISCHARGE CONDUIT HAVING FIRST AND SECOND ENDS, MEANS ROTATABLY CONNECTING SAID FIRST END OF SAID CONDUIT TO AN UPRIGHT END WALL OF SAID DRUM AT A POINT SPACED FROM THE AXIS OF ROTATION OF SAID DRUM, MEANS PROVIDING COMMUNICATION BETWEEN THE INTERIOR OF SAID DRUM AND SAID FIRST END OF SAID CONDUIT, THE LONGITUDINAL AXIS OF SAID CONDUIT EXTENDING AT AN ANGLE WITH RESPECT TO THE LONGITUDINAL AXIS OF SAID DRUM, THE SECOND END OF SAID CONDUIT BEING DISPOSED BELOW SAID FIRST END OF SAID CONDUIT IN ALL ROTATIVE DISPOSITIONS OF SAID DRUM, MEANS SLIDABLY SUPPORTING SAID SECOND END OF SAID CONDUIT, AND MEANS FOR ROTATING SAID DRUM SO THAT SAID FIRST END OF SAID CONDUIT MAY BE DISPOSED BELOW THE LEVEL OF MOLTEN METAL IN SAID DRUM TO EFFECT A DISCHARGE OF MOLTEN METAL IN SAID DRUM THROUGH SAID CONDUIT TO A VESSEL DISPOSED TO ONE SIDE OF SAID DRUM.
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |