US4631013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for atomization of unstable melt streams
Assignee: General Electric Co
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Filing: 1984-02-29
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Granted: 1986-12-23
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Expires: 2004-02-29
Abstract
Abstract An apparatus for atomization of high temperature melts to from very finely divided powder. The apparatus has a ceramic central melt delivery tube. Melt is introduced at the top and exits at the bottom. At the exit surface a high velocity gas impinges on the melt to atomize the melt into fine particles. The bottom portion of the melt delivery tube has an internal shape to expand the external configuration of the melt stream.
Inventors
- 👤 Steven A. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:27
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/02; B22F9/06; B22F9/08; B22F9/082
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
171 words
An atomization apparatus for atomization of a melt at high temperature comprising: a ceramic melt delivery tube having a melt entry end and a melt discharge end for delivery of a stream of melt of solid cross section to a zone at the discharge end of said tube, a gas delivery system surrounding said melt delivery tube and including a gas delivery orifice extending completely around the discharge end of said melt delivery tube and closely coupled to said discharge end for delivery of atomizing gas at elevated pressure against the discharge end of said tube and into said zone, said melt delivery tube having the discharge end internally shaped to expand the external configuration of the melt stream in the melt delivery tube and thereby to increase the extenral surface area per unit volume of melt flowing from the melt discharge end of said melt delivery tube into said zone, and said melt delivery tube having the discharge end externally tapered and shaped to conform to the internal shape thereof.
Claim 2
Dependent Claim
171 words
An atomization apparatus for atomization of a melt at high temperature comprising: a ceramic melt delivery tube having a melt entry end and a melt discharge end for delivery of a stream of melt of solid cross section to a zone at the discharge end of said tube, a gas delivery system surrounding said melt delivery tube and including a gas delivery orifice extending completely around the discharge end of said melt delivery tube and closely coupled to said discharge end for delivery of atomizing gas at elevated pressure against the discharge end of said tube and into said zone, said melt delivery tube having the discharge end internally shaped to expand the external configuration of the melt stream in the melt delivery tube and thereby to increase the extenral surface area per unit volume of melt flowing from the melt discharge end of said melt delivery tube into said zone, and said melt delivery tube having the discharge end externally tapered and shaped to conform to the internal shape thereof.
Claim 3
Dependent Claim
27 words
The nozzle of claim 1 in which the discharge end of the melt delivery tube has irregularities to alter the smooth flow of melt through said tube.
Claim 4
Dependent Claim
78 words
An atomization nozzle for gas atomization of molten metals comprising, a tube for delivery of said molten metal to an atomization zone, said tube having an internal star shaped opening at the end proximate said zone, said tube having an external taper and shape at said end which conforms to the internal shape of said opening, and a gas atomization nozzle surrounding said tube end and being closely coupled thereto for delivery of atomizing gas against the tube.
Claim 5
Dependent Claim
78 words
An atomization nozzle for gas atomization of molten metals comprising, a tube for delivery of said molten metal to an atomization zone, said tube having an internal star shaped opening at the end proximate said zone, said tube having an external taper and shape at said end which conforms to the internal shape of said opening, and a gas atomization nozzle surrounding said tube end and being closely coupled thereto for delivery of atomizing gas against the tube.
References Cited (Backward Citations)
US1156079A
Cited
DE950422C
Cited
US2402441A
Cited
US2451546A
Cited
US2626484A
Cited
US3017664A
Cited
US2968062A
Cited
US3293334A
Cited
GB1163967A
Cited
GB1166686A
Cited
GB1189172A
Cited
GB1250969A
Cited
US3834629A
Cited
GB1403613A
Cited
US3825379A
Cited
US4194897A
Cited
US3988084A
Cited
GB1529858A
Cited
US4272463A
Cited
US4337074A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-22 | 1990-06-23 | 1990-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-22 | 1994-06-23 | 1994-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-22 | 1998-06-23 | 1998-12-23 | $7700.00 | Window Closed / Lapsed |