US4439379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the continuous manufacture of finely divided metals, particularly magnesium
Assignee: Individual
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Filing: 1983-01-31
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Granted: 1984-03-27
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Expires: 2003-01-31
Abstract
Abstract A method for continuously manufacturing finely divided magnesium, and similar metals, in which a liquid stream of magnesium ejected from a nozzle is impacted by a high velocity stream of inert gas to "atomize" the liquid magnesium, including the intermittent entrainment of an abrasive powder in the inert gas stream to remove the build-up of solid magnesium or magnesium compounds that otherwise would collect on the end of the nozzle and interfere with continuous operation of the "atomizing" process.
Inventors
- 👤 Robert J. Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:11
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/02; B22F9/06; B22F9/08; B22F9/082; B22F2009/0892; B22F2999/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
109 words
A method for manufacturing finely divided particles of magnesium comprising: (a) projecting a stream of molten magnesium into an enclosed chamber containing a gaseous atmosphere inert to said magnesium; (b) projecting at a velocity exceeding that of the magnesium a stream of inert gas to contact and atomize said magnesium stream into a spray of finely divided droplets, said droplets being dispersed and cooled by said inert gas within said chamber to solidification; and (c) entraining in said inert gas stream prior to contact with said magnesium stream a finely divided abrasive particulate comprising an oxide of magnesium which combines with said formed droplets and said solid magnesium particles.
Claim 2
Independent Claim
109 words
A method for manufacturing finely divided particles of magnesium comprising: (a) projecting a stream of molten magnesium into an enclosed chamber containing a gaseous atmosphere inert to said magnesium; (b) projecting at a velocity exceeding that of the magnesium a stream of inert gas to contact and atomize said magnesium stream into a spray of finely divided droplets, said droplets being dispersed and cooled by said inert gas within said chamber to solidification; and (c) entraining in said inert gas stream prior to contact with said magnesium stream a finely divided abrasive particulate comprising an oxide of magnesium which combines with said formed droplets and said solid magnesium particles.
Claim 3
Dependent Claim
58 words
The method of claim 1 wherein said inert gas is selected from the group consisting of helium and argon, said stream of molten magnesium issuing from a nozzle having a tip and said gas stream being positioned to strike the tip of said nozzle and said magnesium stream to atomize said magnesium stream into said finely divided droplets.
Claim 4
Independent Claim
116 words
A method for manufacturing finely divided particles of a magnesium alloy comprising: (a) projecting a stream of molten magnesium alloy into an enclosed chamber containing a gaseous atmosphere inert to said magnesium alloy; (b) projecting at a velocity exceeding that of the magnesium alloy a stream of inert gas to contact and atomize said magnesium alloy stream into a spray of finely divided droplets, said droplets being dispersed and cooled by said inert gas within said chamber to solidification; and (c) entraining in said inert gas stream prior to contact with said magnesium alloy stream a finely divided abrasive particulate comprising an oxide of magnesium which combines with said formed droplets and said solid magnesium particles.
Claim 5
Independent Claim
116 words
A method for manufacturing finely divided particles of a magnesium alloy comprising: (a) projecting a stream of molten magnesium alloy into an enclosed chamber containing a gaseous atmosphere inert to said magnesium alloy; (b) projecting at a velocity exceeding that of the magnesium alloy a stream of inert gas to contact and atomize said magnesium alloy stream into a spray of finely divided droplets, said droplets being dispersed and cooled by said inert gas within said chamber to solidification; and (c) entraining in said inert gas stream prior to contact with said magnesium alloy stream a finely divided abrasive particulate comprising an oxide of magnesium which combines with said formed droplets and said solid magnesium particles.
Claim 6
Dependent Claim
17 words
The method of claim 3 wherein said magnesium alloy contains at least 60% by weight of magnesium.
Claim 7
Dependent Claim
27 words
The method of claim 3 wherein said magnesium alloy is an alloy of magnesium and aluminum containing about 65% by weight magnesium and 35% by weight aluminum.
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) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |