US4640497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtration apparatus
Assignee: SWISS ALUMINIUM Ltd CH-3965 CHIPPIS SWITZERLAND A CORP OF
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Filing: 1985-10-25
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Granted: 1987-02-03
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Expires: 2005-10-25
Abstract
Abstract Improved filtration apparatus including a filter chamber having a metal inlet and a metal outlet defining a molten metal flow path therebetween and a filtration assembly engageable therewith disposed between the inlet and the outlet.
Inventors
- 👤 Mark L. Heamon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:19
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/02; C22B9/023; C22B21/00; C22B21/06; C22B21/066; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
123 words
An improved molten metal filtration apparatus comprising a filter chamber having an internal surface for contact with molten metal, an external surface out of contact with molten metal, a molten metal inlet and a molten metal outlet defining a molten metal flow path therebetween, a removable filtration assembly engageable with said filter chamber and disposed between said inlet and outlet including a solid, plate-like member resistant to said molten metal completely blocking said flow path, a porous filter member seated in said solid member permitting flow of molten metal therethrough so that molten metal flowing through the filter chamber will flow through the porous filter member and means on said external surface for engaging and disengaging said filtration assembly from the filter chamber.
Claim 2
Dependent Claim
123 words
An improved molten metal filtration apparatus comprising a filter chamber having an internal surface for contact with molten metal, an external surface out of contact with molten metal, a molten metal inlet and a molten metal outlet defining a molten metal flow path therebetween, a removable filtration assembly engageable with said filter chamber and disposed between said inlet and outlet including a solid, plate-like member resistant to said molten metal completely blocking said flow path, a porous filter member seated in said solid member permitting flow of molten metal therethrough so that molten metal flowing through the filter chamber will flow through the porous filter member and means on said external surface for engaging and disengaging said filtration assembly from the filter chamber.
Claim 3
Dependent Claim
14 words
An apparatus according to claim 1 wherein said filtration assembly is substantially vertically disposed.
Claim 4
Dependent Claim
16 words
An apparatus according to claim 1 wherein said porous filter member is a ceramic foam filter.
Claim 5
Dependent Claim
24 words
An appartus according to claim 1 wherein said porous filter member is round with a bevelled edge to tightly seat in said solid member.
Claim 6
Dependent Claim
15 words
An apparatus according to claim 4 including a peripheral gasket circumscribing said porous filter member.
Claim 7
Dependent Claim
22 words
An apparatus according to claim 1 including a peripheral gasket circumscribing said solid member disposed between said filtration assembly and filter chamber.
Claim 8
Dependent Claim
27 words
An apparatus according to claim 1 including a second solid, plate-like baffle member disposed between said inlet and said porous filter member partially blocking said flow path.
Claim 9
Dependent Claim
34 words
An appartus according to claim 1 including a second filtration assembly disposed downstream of said filtration assembly and upstream of said outlet so as to provide two of said porous filter members in series.
Claim 10
Dependent Claim
40 words
An apparatus according to claim 1 wherein said filter chamber external surface includes at least two sets of slots and the filtration assembly includes flanges mating with one of said sets for seating the filtration assembly in said filter chamber.
Claim 11
Dependent Claim
23 words
An apparatus according to claim 9 including three of said sets of slots wherein said filtration assembly is seating in the middle slot.
Claim 12
Dependent Claim
22 words
An apparatus according to claim 10 including a plate-like baffle seated in the first set of slots upstream of said filtration assembly.
Claim 13
Dependent Claim
23 words
An apparatus according to claim 11 including a second filtration assembly seated in the third of said slots downstram of said filtration assembly.
Claim 14
Dependent Claim
22 words
An apparatus according to claim 1 including means on said filtration assembly permitting removal of the filtration assembly from said filter chamber.
Claim 15
Dependent Claim
35 words
An apparatus according to claim 7 wherein said plate-like baffle member is operative to force molten metal to the bottom of the filter chamber and to prevent floating inclusions from reaching the porous filter member.
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) | 1990-02-02 | 1990-08-04 | 1991-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-02 | 1994-08-04 | 1995-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-02 | 1998-08-04 | 1999-02-03 | $7700.00 | Window Closed / Lapsed |