Patent US3669434A successfully refreshed from Google Patents.
US3669434A
Expired / Lapsed
US
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Pparatus for melting particulate metal
Assignee: Kloeckner Werke AG
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Filing: 1971-01-13
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Granted: 1972-06-13
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Expires: 1991-01-13
Abstract
Abstract An upright elongated in part refractory lined melting chamber in which a charge of particulate metal is melted by the flame of a lance such that the metal of the charge melts and flows onto the bottom wall of the chamber and thereby becomes interposed between the flame and the bottom wall, whereby the bottom wall is protected from the flame of the interposed metal. An outlet is provided beneath the flame for evacuating the melted metal from the melting chamber.
Inventors
- 👤 Gunter Geck
- 👤 Hans Jurgen Langhammer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:03
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/56; C21C5/562; C21C5/565; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S266/00; Y10S266/90
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
111 words
An apparatus for melting particulate metal comprising means defining an upright elongated melting chamber having a substantially uniform diameter over the whole length thereof and a bottom wall; admitting means for admitting a charge of particulate metal into said melting chamber; heating means for directing a disc-shaped flame extending substantially over the entire surface of the leading end of said particulate metal into contact with said leading end so that the metal of said charge melts and flows onto said bottom wall, thereby becoming interposed between said flame and said bottom wall, and protecting the latter from the former; and outlet means for evacuating the melted metal from said melting chamber.
Claim 2
Independent Claim
111 words
An apparatus for melting particulate metal comprising means defining an upright elongated melting chamber having a substantially uniform diameter over the whole length thereof and a bottom wall; admitting means for admitting a charge of particulate metal into said melting chamber; heating means for directing a disc-shaped flame extending substantially over the entire surface of the leading end of said particulate metal into contact with said leading end so that the metal of said charge melts and flows onto said bottom wall, thereby becoming interposed between said flame and said bottom wall, and protecting the latter from the former; and outlet means for evacuating the melted metal from said melting chamber.
Claim 3
Independent Claim
101 words
An apparatus for melting particulate metal comprising means defining an upright melting chamber having a longitudinal axis and a bottom wall; admitting means for admitting a charge of particulate metal into said melting chamber; heating means including a lance extending coaxially with said longitudinal axis for directing a flame into contact with the leading end of said particulate metal so that the metal of said charge melts and flows onto said bottom wall, thereby becoming interposed between said flame and said bottom wall, and protecting the latter from the former; and outlet means for evacuating the melted metal from said chamber.
Claim 4
Independent Claim
101 words
An apparatus for melting particulate metal comprising means defining an upright melting chamber having a longitudinal axis and a bottom wall; admitting means for admitting a charge of particulate metal into said melting chamber; heating means including a lance extending coaxially with said longitudinal axis for directing a flame into contact with the leading end of said particulate metal so that the metal of said charge melts and flows onto said bottom wall, thereby becoming interposed between said flame and said bottom wall, and protecting the latter from the former; and outlet means for evacuating the melted metal from said chamber.
Claim 5
Dependent Claim
33 words
An apparatus as defined in claim 2, wherein said lance comprises a lance head including a plurality of orifices for directing said flame into contact with said leading end of said particulate metal.
Claim 6
Dependent Claim
28 words
An apparatus as defined in claim 2, wherein said heating means includes a guide support surrounding said lance at least in the region of the leading end thereof.
Claim 7
Dependent Claim
18 words
An apparatus as defined in claim 2, wherein said lance extends through said top of said melting chamber.
Claim 8
Dependent Claim
19 words
An apparatus as defined in claim 2, wherein said lance extends through said bottom wall od said melting chamber.
Claim 9
Dependent Claim
24 words
An apparatus as defined in claim 2, wherein said lance includes a lance head positioned in substantially spaced apart relationship with said bottom wall.
Claim 10
Dependent Claim
31 words
An apparatus as defined in claim 6, wherein said bottom wall includes an upwardly directed projection concentrically surrounding said lance, and a groove surrounding said projection for accumulating said molten metal.
Claim 11
Dependent Claim
22 words
An apparatus as defined in claim 8, wherein said groove is trough-shaped, and wherein said outlet means communicates with said trough-shaped groove.
Claim 12
Dependent Claim
19 words
An apparatus as defined in claim 8, wherein said projection includes an annular cooling chamber concentrically surrounding said lance.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |