Patent US4408531A successfully refreshed from Google Patents.
Patent US4468183A successfully refreshed from Google Patents.
US4468183A
Expired / Lapsed
US
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Apparatus for the production of particulate metal
Assignee: Alcoa Corp
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Filing: 1982-08-31
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Granted: 1984-08-28
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Expires: 2002-08-31
Abstract
Abstract An improved apparatus for the production of particulate metal is disclosed. The apparatus includes a containment vessel having a sidewall and a bottom plate, a source of metal external to the vessel, nozzle means carried by the bottom plate and providing communication between the vessel and the external source of metal, and release means associated with the sidewall to inhibit deposition of the particulate metal on the sidewall.
Inventors
- 👤 Robert A. Ramser
- 👤 Daniel R. Barch
- 👤 Kalman E. Buchovecky
- 👤 Ray A. Kuchera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:40
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/02; B22F9/06; B22F9/08; B22F9/082
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
79 words
An improved apparatus for the production of particulate metal comprising: (a) a containment vessel having a sidewall extending to a bottom plate; (b) a source of molten metal external to said vessel; (c) nozzle means capable of converting said molten metal into metal particles carried by said bottom plate and providing communication between said vessel and said external source of metal, and (d) release means associated with said sidewall to inhibit deposition of said metal particles on said sidewall.
Claim 2
Dependent Claim
79 words
An improved apparatus for the production of particulate metal comprising: (a) a containment vessel having a sidewall extending to a bottom plate; (b) a source of molten metal external to said vessel; (c) nozzle means capable of converting said molten metal into metal particles carried by said bottom plate and providing communication between said vessel and said external source of metal, and (d) release means associated with said sidewall to inhibit deposition of said metal particles on said sidewall.
Claim 3
Dependent Claim
30 words
The apparatus of claim 1 wherein said release means comprises a finish on the inner surface of said sidewall providing a roughness not greater than 100 to 150 microns RMS.
Claim 4
Dependent Claim
24 words
The apparatus of claim 2 wherein said inner surface is finished to provide finish lines in the direction of flow of said metal particles.
Claim 5
Dependent Claim
24 words
The apparatus of claim 2 wherein a release agent selected from the class consisting of waxes and polymeric materials is applied to said surface.
Claim 6
Dependent Claim
43 words
The apparatus of claim 1 wherein said release means comprises means for directing the flow of a collecting gas comprising cool air entering said vessel to flow adjacent the sidewall to lower the temperature thereof to inhibit the deposition of metal particles thereon.
Claim 7
Dependent Claim
37 words
The apparatus of claim 5 wherein said collecting gas lowers the temperature of said sidewall by flowing along the outer surface of said sidewall prior to entering the inner portion of said vessel adjacent said nozzle means.
Claim 8
Dependent Claim
27 words
The apparatus of claim 1 wherein said source of metal comprises a molten aluminum alloy whereby metal particles of an aluminum alloy are produced by said apparatus.
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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) | 1987-08-28 | 1988-02-27 | 1988-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-28 | 1992-02-27 | 1992-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-28 | 1996-02-27 | 1996-08-28 | $7700.00 | Window Closed / Lapsed |