US3789126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric furnace for heating and melting scrap iron and steel
Assignee: Individual
•
Filing: 1972-12-20
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Granted: 1974-01-29
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Expires: 1992-12-20
Abstract
Abstract An electric furnace for heating and melting iron and steel scrap is provided having an inclined, rotatable cylinder into which batched quantities of scrap are fed, at the upper end thereof, from a hopper that is vibrated. Teeth in the cylinder control the flow of the scrap therethrough. Scrap is delivered from the lower end of the cylinder into a basin in which electrode means are positioned. The slag and melted metal are removed by tilting the basin. Slidable locks control the flow of flue gases and means for cooling the cylinder are also provided.
Inventors
- 👤 U Brusa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:19
CPC Classifications
F; F27; F27D; F27D13/00; F27D13/002; C; C21; C21C; C21C5/00; C21C5/52; C21C5/5252; F27D3/00; F27D3/18; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
152 words
An electric furnace for heating and melting iron and steel scrap, comprising a basin made at least in part of refractory material, a crown covering said basin, electrode means extending through said crown, a channel formed in said crown for introducing heated scrap into said basin, a cylinder made of a refractory material and inclined relative to the horizontal plane, the lower end of said cylinder being formed integrally with said crown and being provided with an eccentric opening through which the scrap is discharged, a contiguous channel communicating with the channel formed in said crown of the basin, means for rotating said cylinder about its axis, means in said cylinder for preheating the scrap, a slidable lock separating the two channels, a jack for actuating said lock, a hood having a chimney for collecting and evacuating the flue gases, and a hopper for introducing batched quantities of scrap into said cylinder.
Claim 2
Dependent Claim
152 words
An electric furnace for heating and melting iron and steel scrap, comprising a basin made at least in part of refractory material, a crown covering said basin, electrode means extending through said crown, a channel formed in said crown for introducing heated scrap into said basin, a cylinder made of a refractory material and inclined relative to the horizontal plane, the lower end of said cylinder being formed integrally with said crown and being provided with an eccentric opening through which the scrap is discharged, a contiguous channel communicating with the channel formed in said crown of the basin, means for rotating said cylinder about its axis, means in said cylinder for preheating the scrap, a slidable lock separating the two channels, a jack for actuating said lock, a hood having a chimney for collecting and evacuating the flue gases, and a hopper for introducing batched quantities of scrap into said cylinder.
Claim 3
Dependent Claim
30 words
A furnace as claimed in claim 1, wherein said cylinder is provided internally, proximate its upper end, with a set of teeth for reducing the drop speed of the scrap.
Claim 4
Dependent Claim
52 words
A furnace as claimed in claim 1, wherein the outer wall surface of said cylinder is provided with a metal coating and has, proximit its lower end, a portion of reduced thickness at which the metal coating is provided with a rearwardly bent limb forming a channel in which cooling water circulates.
Claim 5
Dependent Claim
63 words
A furnace as claimed in claim 1, wherein said channel formed in the crown of said basin is provided, adjacent to said slidable lock, with an opening which leads to a chimney serving for evacuating the flue gases, there being further provided in said chimney a slidable lock for cutting off the communication with said channel formed in the crown of said basin.
Claim 6
Dependent Claim
39 words
A furnace as claimed in claim 1, wherein the bottom of said hopper is inclined towards said cylinder and is supported on resilient means, means being provided for oscillating said hopper whereby the scrap is introduced into said cylinder.
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |