US3379424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scrap metal preheaters
Assignee: Alco Industries Inc
•
Filing: 1966-07-05
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Granted: 1968-04-23
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Expires: 1986-07-05
Abstract
No abstract record available.
Inventors
- 👤 Agnese David E Dell
- 👤 Tinker Townsond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:01
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/56; C21C5/562; C21C5/565; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A SCRAP METAL PREHEATER, COMPRISING: A FURNACE HAVING A FIRST SCRAP METAL-HOLDING COMPARTMENT AND HAVING A SECOND SCRAP-HOLDING COMPARTMENT THEREABOVE; MEANS ROTATABLY SUPPORTING SAID FURNACE WHEREBY IT CAN BE ROTATED SUBSTANTIALLY 180*; GAS INLET MEANS DETACHABLY CONNECTED TO SAID FURNACE AND ADAPTED TO PERMIT THE INTRODUCTION OF COMBUSTION GASES FROM A SOURCE INTO THE LOWER PORTION OF SAID FURNACE TO PREHEAT A SCRAP CHARGE THEREIN, SAID COMBUSTION GASES FLOWING UPWARDLY FROM SAID LOWER FURNACE PORTION TO PARTIALLY PREHEAT SCRAP CHARGE IN THE COMPARTMENT THEREABOVE; MEANS FOR DISCHARGING A FULLY PREHEATED SCRAP CHARGE FROM SAID LOWER COMPARTMENT; AND MEANS FOR ROTATING SAID FURNACE TO SHIFT SAID EMPTY COMPARTMENT TO AN UPPER POSITION TO RECEIVE A NEW CHARGE OF SCRAP METAL WHILE SHIFTING SAID SECOND COMPARTMENT TO A POSITION THEREBELOW TO RECEIVE THE HOT COMBUSTION GASES FROM SAID SOURCE, SAID GASES HEATING SAID LOWER SCRAP CHARGE TO A DESIRED TEMPERATURE AND FLOWING UPWARDLY THEREFROM TO PARTIALLY PREHEAT A CHARGE IN SAID UPPER COMPARTMENT.
Claim 2
Dependent Claim
161 words
A SCRAP METAL PREHEATER, COMPRISING: A FURNACE HAVING A FIRST SCRAP METAL-HOLDING COMPARTMENT AND HAVING A SECOND SCRAP-HOLDING COMPARTMENT THEREABOVE; MEANS ROTATABLY SUPPORTING SAID FURNACE WHEREBY IT CAN BE ROTATED SUBSTANTIALLY 180*; GAS INLET MEANS DETACHABLY CONNECTED TO SAID FURNACE AND ADAPTED TO PERMIT THE INTRODUCTION OF COMBUSTION GASES FROM A SOURCE INTO THE LOWER PORTION OF SAID FURNACE TO PREHEAT A SCRAP CHARGE THEREIN, SAID COMBUSTION GASES FLOWING UPWARDLY FROM SAID LOWER FURNACE PORTION TO PARTIALLY PREHEAT SCRAP CHARGE IN THE COMPARTMENT THEREABOVE; MEANS FOR DISCHARGING A FULLY PREHEATED SCRAP CHARGE FROM SAID LOWER COMPARTMENT; AND MEANS FOR ROTATING SAID FURNACE TO SHIFT SAID EMPTY COMPARTMENT TO AN UPPER POSITION TO RECEIVE A NEW CHARGE OF SCRAP METAL WHILE SHIFTING SAID SECOND COMPARTMENT TO A POSITION THEREBELOW TO RECEIVE THE HOT COMBUSTION GASES FROM SAID SOURCE, SAID GASES HEATING SAID LOWER SCRAP CHARGE TO A DESIRED TEMPERATURE AND FLOWING UPWARDLY THEREFROM TO PARTIALLY PREHEAT A CHARGE IN SAID UPPER COMPARTMENT.
References Cited (Backward Citations)
US890250A
Cited
US2235154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |