US3667747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conveyor heater
Assignee: FECOR IND Ltd
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Filing: 1970-05-19
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Granted: 1972-06-06
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Expires: 1990-05-19
Abstract
Abstract AN APPARATUS FOR PREHEATING A SCRAP CHARGE BEFORE IT IS MELTED IN A FURNACE INCLUDES A COMBUSTOR AND A PLENUM WHICH ARE INSTALLED ON A VIBRATORY CONVEYOR FOR MOVEMENT CONJOINTLY THEREWITH. THE COMBUSTOR, WHICH HAS A NON-REFRACTORY COMBUSTION CHAMBER LINING WHICH IS COOLED BY THE INCOMING AIR, DELIVERS HEATED AIR UNDER PRESSURE TO THE PLENUM LOCATED UNDER THE CONVEYOR TROUGH, FROM WHICH THE HEATED AIR IS FORCED THROUGH A PLURALITY OF PASSAGEWAYS IN THE CONVEYOR SURFACE TO THE SCRAP CHARGE CARRIED IN THE CONVEYOR TROUGH. AFTER THE SCRAP IS PREHEATED, A GATE-RAMP AT THE DOWNSTREAM END OF THE CONVEYOR LOWERS TO DELIVER THE SCRAP TO THE FURNACE.
Inventors
- 👤 Robert W Graybill
- 👤 Stanley C Reiber
- 👤 Donald W Nace
- 👤 Ellis S White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:38
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/56; C21C5/562; C21C5/565; F; F27; F27D; F27D13/00; F27D13/002; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S266/00; Y10S266/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |