Patent US3622141A successfully refreshed from Google Patents.
US3622141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous metal melting method and furnace therefor
Assignee: Individual
•
Filing: 1968-10-16
•
Granted: 1971-11-23
•
Expires: 1988-10-16
Abstract
Abstract The arc melting process uses no electrode for the melting operation and continuously melts bulks of scrap metal which have been previously preheated, compressed and fed into a furnace by opposing ends simultaneously.
Inventors
- 👤 Ugo Brusa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:12
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/52; C21C5/527; C21C5/56; C21C5/562; H; H05; H05B; H05B7/00; H05B7/18; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
119 words
Electric arc furnace for melting of scrap metal which comprises an elongated chamber having substantially a cylindrical shape, hermetically sealed and electrically insulated, having at each of its two ends at least one cylindrical throat with a semicylindrical guide portion made of steel and extending within said chamber as a saddle, a diaphragm positioned transversely in said throat, a compressing reciprocating piston mounted within each of said throats for compacting the scrap against said diaphragm and feeding said scrap towards said chamber, preheating means for said scrap metal internally of said chamber and externally of said throat, said preheating means being located axially along said chamber, means for initiating an arc and a collection vessel for the molten metal.
Claim 2
Dependent Claim
119 words
Electric arc furnace for melting of scrap metal which comprises an elongated chamber having substantially a cylindrical shape, hermetically sealed and electrically insulated, having at each of its two ends at least one cylindrical throat with a semicylindrical guide portion made of steel and extending within said chamber as a saddle, a diaphragm positioned transversely in said throat, a compressing reciprocating piston mounted within each of said throats for compacting the scrap against said diaphragm and feeding said scrap towards said chamber, preheating means for said scrap metal internally of said chamber and externally of said throat, said preheating means being located axially along said chamber, means for initiating an arc and a collection vessel for the molten metal.
Claim 3
Dependent Claim
28 words
Electric furnace, according to claim 1, wherein said cylindrical throats extend considerably within said chamber to protect the compressed scrap from the direct action of said preheating means.
Claim 4
Dependent Claim
49 words
Electric furnace, according to claim 1, wherein the outer endS of said cylindrical throats are provided with overturnable lids which when in open position allow the charging of said scrap metal into the throats and, when in closed position allow the compression of said scrap by said reciprocating pistons.
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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |