US4638980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for maintaining the temperature of molten metal
Assignee: Kloeckner Humboldt Deutz AG
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Filing: 1986-03-04
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Granted: 1987-01-27
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Expires: 2006-03-04
Abstract
Abstract An apparatus (1) for storing and maintaining the temperature level of molten metals, such as a cast iron melt which has been treated with pure magnesium. The apparatus includes a heatable furnace chamber (3) having a pressure-tight cover (4) and an inlet and an outlet (2), which also may be provided with a cover (6). The inlet and outlet (2) is preferably formed as a common inlet and outlet siphon. The closed furnace chamber (3) is supplied with a medium such as argon or nitrogen under pressure. A cast iron melt which has been treated with particular additives can be maintained at a certain temperature over longer periods of time with a decaying effect.
Inventors
- 👤 Gunther Beele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:11
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/10; C22; C22C; C22C33/00; C22C33/08; C22C33/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
127 words
Apparatus for storing and maintaining a predetermined temperature level of a nodular cast iron melt which has been treated with magnesium, comprising: a heatable furnace chamber having a main part with an inner cavity for holding the major part of the melt and a combined inlet and outlet part secured to the main part, a chamber cover for the main part, a pressure sealing arrangement between said chamber cover and said main part, a closing cover in pressure sealed relation with said inlet and outlet part, and an inlet in said apparatus for delivering a medium under pressure to said cavity of said furnace chamber whereby the latter is maintained at a predetermined pressure greater than atmospheric pressure to prevent disintegration of the magnesium in said melt.
Claim 2
Dependent Claim
127 words
Apparatus for storing and maintaining a predetermined temperature level of a nodular cast iron melt which has been treated with magnesium, comprising: a heatable furnace chamber having a main part with an inner cavity for holding the major part of the melt and a combined inlet and outlet part secured to the main part, a chamber cover for the main part, a pressure sealing arrangement between said chamber cover and said main part, a closing cover in pressure sealed relation with said inlet and outlet part, and an inlet in said apparatus for delivering a medium under pressure to said cavity of said furnace chamber whereby the latter is maintained at a predetermined pressure greater than atmospheric pressure to prevent disintegration of the magnesium in said melt.
Claim 3
Dependent Claim
44 words
The apparatus of claim 1 wherein said sealing arrangement includes an upwardly open sealing groove on the rim of said main part of said furnace chamber and a sealing strip extending into and in sealing engagement with said groove and with said chamber cover.
Claim 4
Dependent Claim
14 words
The apparatus of claim 2 wherein said sealing strip has a T-shaped cross section.
Claim 5
Dependent Claim
48 words
The apparatus of claim 3 and further comprising a layer of fireproof corundum material between said rim of said main part of said furnace chamber and said chamber cover in protective relation to said sealing strip and sealing groove when said chamber cover is in a closed condition.
Claim 6
Dependent Claim
26 words
The apparatus of claim 1 and further comprising a closing arrangement including a releasable locking pin operative to secure said chamber cover to said furnace chamber.
Claim 7
Dependent Claim
31 words
The apparatus of claim 1 wherein said inlet and outlet part of the furnace chamber is a combined inlet and outlet siphon secured to said main part of said furnace chamber.
Claim 8
Dependent Claim
55 words
The apparatus of claim 6 wherein said closing cover for said outlet siphon is pivotally connected thereto for swinging movement between open and closed positions and further comprising a linear actuator connected at its opposite ends to said siphon and said closing cover and operable to move the latter between its open and closed positions.
Claim 9
Dependent Claim
24 words
The apparatus of claim 1 wherein said parts of said furnace chamber and said covers are lined on the inside with a fireproof material.
Claim 10
Dependent Claim
48 words
The apparatus of claim 8 wherein said fireproof lining of said chamber cover and said fireproof lining of said main part are formed in such a way that said chamber cover has lapped parts serving to shield said sealing arrangement from said inner cavity of said furnace chamber.
Claim 11
Dependent Claim
16 words
The apparatus of claim 1 and further comprising a pressure relief valve for said inner cavity.
Claim 12
Dependent Claim
16 words
The apparatus of claim 10 wherein said pressure relief valve is located on said chamber cover.
Claim 13
Dependent Claim
36 words
The apparatus of claim 1 and further comprising an inductor for heating the furnace chamber, said inductor being secured to and depending downward from said main part of said furnace chamber remote from said chamber cover.
Claim 14
Dependent Claim
18 words
The apparatus of claim 12 and further comprising a cooling flange intermediate said inductor and said main part.
Claim 15
Dependent Claim
38 words
The apparatus of claim 1 and further comprising means supporting said furnace chamber for tilting movement about a pivot and an actuator operable to tilt said furnace chamber about said pivot between melt storing and melt pouring positions.
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) | 1990-01-26 | 1990-07-28 | 1991-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-26 | 1994-07-28 | 1995-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-26 | 1998-07-28 | 1999-01-27 | $7700.00 | Window Closed / Lapsed |