Patent US3777801A successfully refreshed from Google Patents.
US3777801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casting apparatus
Assignee: GRAVICAST PATENT GmbH
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Filing: 1971-08-26
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Granted: 1973-12-11
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Expires: 1991-08-26
Abstract
Abstract A casting apparatus is provided with a supply container for the melt which has a discharge opening leading the fluid melt into an equalization container arranged within said supply container in such a manner that the melt in the supply container surrounds the equalization container. The latter has a plug-controlled inlet which controls the flow of the melt into the equalization container. The equalization container has also an outlet having a casting nozzle therein which leads to a mold arranged outside of the supply container. The supply container is connected with a furnace in which the metal is produced.
Inventors
- 👤 O Tenner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:46
CPC Classifications
B; B22; B22D; B22D18/00; B22D18/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
191 words
An apparatus for mold casting, comprising a supply container in communication with a source of molten casting material; an equalization container supported within said supply container and provided with an inlet opening for admission of said molten casing material and further provided at a distance from said inlet opening with an upwardly directed outlet nozzle for passage of molten casting material into a mold placed over the discharge end of said nozzle; and control means for opening and closing said inlet opening to the equalization container, whereby said molten casting material may be selectively admitted into and flow through said equalization container and upwardly through said nozzle during substantial elimination of turbulence, the outer surface of said equalization container being spaced from the inside of said supply container at least along a portion of the distance between said inlet opening and said casting nozzle, whereby the molten casting material in the supply container may flow around said equalization container, thereby maintaining the molten casting material within said equalization container and said casting nozzle at a predetermined temperature while substantially eliminating turbulence in the flow between said inlet opening and casting nozzle.
Claim 2
Independent Claim
191 words
An apparatus for mold casting, comprising a supply container in communication with a source of molten casting material; an equalization container supported within said supply container and provided with an inlet opening for admission of said molten casing material and further provided at a distance from said inlet opening with an upwardly directed outlet nozzle for passage of molten casting material into a mold placed over the discharge end of said nozzle; and control means for opening and closing said inlet opening to the equalization container, whereby said molten casting material may be selectively admitted into and flow through said equalization container and upwardly through said nozzle during substantial elimination of turbulence, the outer surface of said equalization container being spaced from the inside of said supply container at least along a portion of the distance between said inlet opening and said casting nozzle, whereby the molten casting material in the supply container may flow around said equalization container, thereby maintaining the molten casting material within said equalization container and said casting nozzle at a predetermined temperature while substantially eliminating turbulence in the flow between said inlet opening and casting nozzle.
Claim 3
Dependent Claim
40 words
Apparatus according to claim 1, in which said casting nozzle bridges the space between the inside of the supply container and the outside of the equalization container, so that said casting nozzle is surrounded by the melt in said space.
Claim 4
Dependent Claim
46 words
ApparaTus according to claim 1, in which said equalization container is constituted by an elongate horizontally disposed tube having two ends and a straight axis, said inlet opening being disposed near one end of said tube, and said nozzle being disposed near the other end thereof.
Claim 5
Dependent Claim
31 words
Apparatus according to claim 3, in which said tube is fixedly attached by insertion of at least one of its ends into an opening traversing the wall of said supply container.
Claim 6
Dependent Claim
48 words
Apparatus according to claim 1, in which said supply container is divided into two superimposed parts along a horizontal plane intersecting said equalization container, means being provided for detachably connecting said parts to each other, and packing material consisting of wool of kaolin being provided between said parts.
Claim 7
Dependent Claim
29 words
Apparatus according to claim 1, in which said control means for opening and closing said inlet opening comprises a plate member slidable in guide means on said equalization container.
Claim 8
Dependent Claim
34 words
Apparatus according to claim 1, including means for connecting said supply container to an induction heating means, including openings in the wall of the supply container near its bottom and below said equalization container.
Claim 9
Dependent Claim
52 words
Apparatus according to claim 2, in which said casting nozzle comprises a hollow body member inserted into a cavity in the wall of the equalization container and extending into an opening of the wall of the supply container where it is sealingly secured to said wall by means of an orifice plate.
Claim 10
Dependent Claim
34 words
Apparatus according to claim 8, in which packing material made of kaolin wool is inserted between the contact surfaces of the nozzle body, the supply container wall, the equalization container and the orifice plate.
Claim 11
Dependent Claim
13 words
Apparatus according to claim 8, including a wear-resisting plate covering said orifice plate.
Claim 12
Dependent Claim
39 words
Apparatus according to claim 8, in which the wall of the equalization container is provided with a through passage in which a displacement member is slidably guided so as to serve for pressurizing the melt within said equalization container.
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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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |