Patent US4504392A successfully refreshed from Google Patents.
US4504392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for filtration of molten metal
Assignee: Christy Refractories Co LLC
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Filing: 1982-04-14
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Granted: 1985-03-12
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Expires: 2002-04-14
Abstract
Abstract An apparatus and method for filtering molten metal is disclosed. The apparatus includes a filtering vessel, a portion of which is a porous filter material. Attached to the rim of the filtering vessel is a shock resistant ring. The filtering vessel is positioned such that the porous filter material is submerged in the molten metal, and the rim is held above the surface of the molten metal by a brace which is attached to a fixed bracket. The molten metal is filtered by seeping through the porous filter material into the filtering vessel. The filtered molten metal is extracted from the filtering vessel.
Inventors
- 👤 Daniel E. Groteke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:33
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/02; C22B9/023; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
125 words
A liquid metal filter apparatus for purifying a metal bath, comprising: a filtering vessel having a rim, sidewalls, and a bottom, said bottom having a hole therethrough; said hole in said bottom of said filtering vessel having a wall, wherein said wall of the hole is substantially vertical; a filter element of a porous ceramic material having an open cell structure characterized by a plurality of interconnected pores, said filter element being cemented to said wall of the hole; a shock resistant ring attached to said rim; a brace rigidly attached to said ring; and a bracket rigidly positioned external to the molten metal bath and said brace being attached to said bracket for rigidly positioning said crucible with respect to the molten metal bath.
Claim 2
Dependent Claim
125 words
A liquid metal filter apparatus for purifying a metal bath, comprising: a filtering vessel having a rim, sidewalls, and a bottom, said bottom having a hole therethrough; said hole in said bottom of said filtering vessel having a wall, wherein said wall of the hole is substantially vertical; a filter element of a porous ceramic material having an open cell structure characterized by a plurality of interconnected pores, said filter element being cemented to said wall of the hole; a shock resistant ring attached to said rim; a brace rigidly attached to said ring; and a bracket rigidly positioned external to the molten metal bath and said brace being attached to said bracket for rigidly positioning said crucible with respect to the molten metal bath.
Claim 3
Dependent Claim
124 words
A liquid metal filter apparatus for purifying a metal bath, comprising: a filtering vessel having a rim, sidewalls, and a bottom, said bottom having a hole therethrough; said hole in said bottom of said filtering vessel having a wall, wherein said wall of the hole is concave; a filter element of a porous ceramic material having an open cell structure characterized by a plurality of interconnected pores, said filter element being cemented to said wall of the hole; a shock resistant ring attached to said rim; a brace rigidly attached to said ring; and a bracket rigidly positioned external to the molten metal bath and said brace being attached to said bracket for rigidly positioning said crucible with respect to the molten metal bath.
Claim 4
Dependent Claim
124 words
A liquid metal filter apparatus for purifying a metal bath, comprising: a filtering vessel having a rim, sidewalls, and a bottom, said bottom having a hole therethrough; said hole in said bottom of said filtering vessel having a wall, wherein said wall of the hole is concave; a filter element of a porous ceramic material having an open cell structure characterized by a plurality of interconnected pores, said filter element being cemented to said wall of the hole; a shock resistant ring attached to said rim; a brace rigidly attached to said ring; and a bracket rigidly positioned external to the molten metal bath and said brace being attached to said bracket for rigidly positioning said crucible with respect to the molten metal bath.
Claim 5
Dependent Claim
15 words
The apparatus of claim 2 wherein said wall of the hole is concave and undercut.
Claim 6
Dependent Claim
137 words
A liquid metal filter apparatus for purifying a metal bath, comprising: a filtering vessel having a rim, sidewalls, and a bottom, said bottom having a hole therethrough; said hole in said bottom of said filtering vessel having a wall, wherein said walls of the hole is substantially convex and said filter element is composed of two or more lamellar sections; a filter element of a porous ceramic material having an open cell structure characterized by a plurality of interconnected pores, said filter element being cemented to said wall of the hole; a shock resistant ring attached to said rim; a brace rigidly attached to said ring; and a bracket rigidly positioned external to the molten metal bath and said brace being attached to said bracket for rigidly positioning said crucible with respect to the molten metal bath.
Claim 7
Dependent Claim
137 words
A liquid metal filter apparatus for purifying a metal bath, comprising: a filtering vessel having a rim, sidewalls, and a bottom, said bottom having a hole therethrough; said hole in said bottom of said filtering vessel having a wall, wherein said walls of the hole is substantially convex and said filter element is composed of two or more lamellar sections; a filter element of a porous ceramic material having an open cell structure characterized by a plurality of interconnected pores, said filter element being cemented to said wall of the hole; a shock resistant ring attached to said rim; a brace rigidly attached to said ring; and a bracket rigidly positioned external to the molten metal bath and said brace being attached to said bracket for rigidly positioning said crucible with respect to the molten metal bath.
Claim 8
Independent Claim
17 words
The apparatus of claims 1, 2, 3, or 4 wherein said filtering vessel has a faceted configuration.
Claim 9
Independent Claim
13 words
The apparatus of claims 5 wherein said faceted configuration is a rectangular configuration.
Claim 10
Dependent Claim
38 words
The apparatus of claim 5 wherein said filter element is comprised of: a first filter segment, and a second filter segment second filter segment having a larger pore size than the pore size of said first filter segment.
Claim 11
Dependent Claim
18 words
The apparatus of claim 1, 2 or 3 wherein said filtering vessel is cast using a castable refractory.
Claim 12
Dependent Claim
22 words
The filtering vessel of claim 8 wherein the sidewalls and the bottom of said filtering vessel are reinforced by a reinforcing mesh.
Claim 13
Dependent Claim
14 words
The filtering vessel of claim 9 wherein said reinforcing mesh is a glass cloth.
Claim 14
Dependent Claim
26 words
The filtering vessel of claim 8 wherein studs for attaching said shock resistant ring protrude from and are cast into said rim of said filtering vessel.
Claim 15
Dependent Claim
39 words
The filtering vessel of claim 11 in wherein the sidewalls and the bottom of said filtering vessel are reinforced by a reinforcing mesh, and the studs are wrapped in said reinforcing mesh before being cast into said filtering vessel.
Claim 16
Dependent Claim
14 words
The filtering vessel of claim 12 wherein said reinforcing mesh is a glass cloth.
Claim 17
Dependent Claim
125 words
A liquid metal filter apparatus for purifying a metal bath, comprising: a faceted configured filtering vessel having a rim, sidewalls, and a bottom, said bottom having a hole therethrough; said hole in said bottom of said filtering vessel having a wall, said wall of said hole is undercut; a filter element of a porous ceramic material having an open cell structure characterized by a plurality of interconnected pores, said filter element being cemented to said wall of the hole; a shock resistant ring attached to said rim; a brace rigidly attached to said ring; and a bracket rigidly positioned external to the molten metal bath and said brace being attached to said bracket for rigidly positioning said crucible with respect to the molten metal bath.
Claim 18
Dependent Claim
125 words
A liquid metal filter apparatus for purifying a metal bath, comprising: a faceted configured filtering vessel having a rim, sidewalls, and a bottom, said bottom having a hole therethrough; said hole in said bottom of said filtering vessel having a wall, said wall of said hole is undercut; a filter element of a porous ceramic material having an open cell structure characterized by a plurality of interconnected pores, said filter element being cemented to said wall of the hole; a shock resistant ring attached to said rim; a brace rigidly attached to said ring; and a bracket rigidly positioned external to the molten metal bath and said brace being attached to said bracket for rigidly positioning said crucible with respect to the molten metal bath.
Claim 19
Independent Claim
13 words
The apparatus of claims 14 wherein said faceted configured filtering vessel is rectangular.
Claim 20
Dependent Claim
38 words
The apparatus of claim 14 wherein said filter element is comprised of: a first filter segment, and a second filter segment second filter segment having a larger pore size than the pore size of said first filter segment.
Claim 21
Dependent Claim
127 words
A liquid metal filter apparatus for purifying a metal bath, comprising: a filtering vessel of a castable refractory having a rim, sidewalls, and a bottom, said bottom having a hole therethrough; said hole in said bottom of said filtering vessel having a wall, said wall of said hole is undercut; a filter element of a porous ceramic material having an open cell structure characterized by a plurality of interconnected pores, said filter element being cemented to said wall of the hole; a shock resistant ring attached to said rim; a brace rigidly attached to said ring; and a bracket rigidly positioned external to the molten metal bath and said brace being attached to said bracket for rigidly positioning said crucible with respect to the molten metal bath.
Claim 22
Dependent Claim
127 words
A liquid metal filter apparatus for purifying a metal bath, comprising: a filtering vessel of a castable refractory having a rim, sidewalls, and a bottom, said bottom having a hole therethrough; said hole in said bottom of said filtering vessel having a wall, said wall of said hole is undercut; a filter element of a porous ceramic material having an open cell structure characterized by a plurality of interconnected pores, said filter element being cemented to said wall of the hole; a shock resistant ring attached to said rim; a brace rigidly attached to said ring; and a bracket rigidly positioned external to the molten metal bath and said brace being attached to said bracket for rigidly positioning said crucible with respect to the molten metal bath.
Claim 23
Dependent Claim
22 words
The filtering vessel of claim 17 wherein the sidewalls and the bottom of said filtering vessel are reinforced by a reinforcing mesh.
Claim 24
Dependent Claim
14 words
The filtering vessel of claim 18 wherein said reinforcing mesh is a glass cloth.
Claim 25
Dependent Claim
26 words
The filtering vessel of claim 17 wherein studs for attaching said shock resistant ring protrude from and are cast into said rim of said filtering vessel.
Claim 26
Dependent Claim
39 words
The filtering vessel of claim 20 in wherein the sidewalls and the bottom of said filtering vessel are reinforced by a reinforcing mesh, and the studs are wrapped in said reinforcing mesh before being cast into said filtering vessel.
Claim 27
Dependent Claim
14 words
The filtering vessel of claim 21 wherein said reinforcing mesh is a glass cloth.
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) | 1988-03-11 | 1988-09-10 | 1989-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-11 | 1992-09-10 | 1993-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-11 | 1996-09-10 | 1997-03-12 | $7700.00 | Window Closed / Lapsed |