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US4925103A
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Magnetic field-generating nozzle for atomizing a molten metal stream into a particle spray
Assignee: Olin Corp
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Filing: 1989-03-13
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Granted: 1990-05-15
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Expires: 2009-03-13
Abstract
Abstract A molten metal spray-depositing apparatus employs a magnetic field-generating nozzle for atomizing a molten metal stream into a spray of metal particles. The magnetic driving field generated by the magnetic atomizing nozzle generates eddy currents which produce an induced field in the metal stream opposing the driving field and creating a torque which causes the stream to break up upon exiting the driving field. The nozzle has one of two configurations for generating one of two generic magnetic field geometries. In one configuration the nozzle utilizes a pair of spaced magnetic poles, such as provided by Helmholtz coils, for generating a transverse magnetic field geometry across the stream. In the other configuration the nozzle employs a solenoid coil for generating a solenoidal magnetic field geometry parallel to the stream. Preferably, the magnetic field of each geometry is a high frequency AC field since better coupling between the field and stream occurs and more eddy currents are induced at higher frequency.
Inventors
- 👤 George J. Muench
- 👤 Brian G. Lewis
- 👤 Sankaranarayanan Ashok
- 👤 William G. Watson
- 👤 Harvey P. Cheskis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:08
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/02; B22F9/06; B22F9/08; B22F9/082; B05; B05B; B05B5/00; B05B7/00; B05B7/16; B05B7/1606; B22D; B22D23/00; B22D23/003; B22F3/00; B22F3/115; B22F2009/0804; B22F2009/0808; B22F2009/088; B22F2009/0892; B22F2998/00; B22F2999/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
66 words
In a molten metal spray-depositing apparatus, the combination comprising: (a) means for producing a stream of molten metal; and (b) means for generating a magnetic field in a predetermined geometry relative to the molten metal stream to induce a torque in the stream which results in atomizing of the molten metal of the stream into a spray of metal particles when the stream exits said field.
Claim 2
Dependent Claim
66 words
In a molten metal spray-depositing apparatus, the combination comprising: (a) means for producing a stream of molten metal; and (b) means for generating a magnetic field in a predetermined geometry relative to the molten metal stream to induce a torque in the stream which results in atomizing of the molten metal of the stream into a spray of metal particles when the stream exits said field.
Claim 3
Dependent Claim
20 words
The apparatus as recited in claim 1, wherein magnetic field of said predetermined geometry is a high frequency AC field.
Claim 4
Dependent Claim
17 words
The apparatus as recited in claim 1, wherein said magnetic field-generating means is a magnetic atomizing nozzle.
Claim 5
Dependent Claim
29 words
The apparatus as recited in claim 3, wherein said magnetic atomizing nozzle has a configuration utilizing a pair of spaced magnetic poles for generating a transverse magnetic field geometry.
Claim 6
Dependent Claim
43 words
The apparatus as recited in claim 4, wherein said nozzle has a body with an orifice for receiving the stream therethrough, said pair of poles of said nozzle being defined by Helmholtz coils supported by said body at opposite sides of said orifice.
Claim 7
Dependent Claim
26 words
The apparatus as recited in claim 3, wherein said magnetic atomizing nozzle has a configuration utilizing a solenoid coil for generating a solenoidal magnetic field geometry.
Claim 8
Dependent Claim
33 words
The apparatus as recited in claim 6, wherein said nozzle has a body with an orifice for receiving the stream therethrough, said solenoid coil being supported by said body and surrounding said orifice.
Claim 9
Dependent Claim
34 words
The apparatus as recited in claim 1, wherein said magnetic field-generating means is a pair of magnetic atomizing nozzles arranged in tandem one above the other for generating magnetic fields of different predetermined geometries.
Claim 10
Dependent Claim
19 words
The apparatus as recited in claim 8, wherein magnetic field of each geometry is a high frequency AC field.
Claim 11
Dependent Claim
31 words
The apparatus as recited in claim 8, wherein one of said magnetic atomizing nozzles has a configuration utilizing a pair of spaced magnetic poles for generating a transverse magnetic field geometry.
Claim 12
Dependent Claim
44 words
The apparatus as recited in claim 10, wherein said one nozzle has a body with an orifice for receiving the stream therethrough, said pair of poles of said nozzle being defined by Helmholtz coils supported by said body at opposite sides of said orifice.
Claim 13
Dependent Claim
29 words
The apparatus as recited in claim 8, wherein the other of said magnetic atomizing nozzles has a configuration utilizing a solenoid coil for generating a solenoidal magnetic field geometry.
Claim 14
Dependent Claim
34 words
The apparatus as recited in claim 12, wherein said other nozzle has a body with an orifice for receiving the stream therethrough, said solenoid coil being supported by said body and surrounding said orifice.
Claim 15
Dependent Claim
82 words
In a molten metal spray-depositing apparatus, the combination comprising: (a) means for producing a stream of molten metal; and (b) a magnetic atomizing nozzle for generating a magnetic field in a predetermined geometry relative to the molten metal stream to induce a torque in the stream which results in atomizing of the molten metal of the stream into a spray of metal particles when the stream exits said field, said magnetic field of said predetermined geometry being a high frequency AC field.
Claim 16
Dependent Claim
82 words
In a molten metal spray-depositing apparatus, the combination comprising: (a) means for producing a stream of molten metal; and (b) a magnetic atomizing nozzle for generating a magnetic field in a predetermined geometry relative to the molten metal stream to induce a torque in the stream which results in atomizing of the molten metal of the stream into a spray of metal particles when the stream exits said field, said magnetic field of said predetermined geometry being a high frequency AC field.
Claim 17
Dependent Claim
29 words
The apparatus as recited in claim 14, wherein said magnetic atomizing nozzle has a configuration utilizing a pair of spaced magnetic poles for generating a transverse magnetic field geometry.
Claim 18
Dependent Claim
43 words
The apparatus as recited in claim 15, wherein said nozzle has a body with an orifice for receiving the stream therethrough, said pair of poles of said nozzle being defined by Helmholtz coils supported by said body at opposite sides of said orifice.
Claim 19
Dependent Claim
26 words
The apparatus as recited in claim 15, wherein said magnetic atomizing nozzle has a configuration utilizing a solenoid coil for generating a solenoidal magnetic field geometry.
Claim 20
Dependent Claim
33 words
The apparatus as recited in claim 17, wherein said nozzle has a body with an orifice for receiving the stream therethrough, said solenoid coil being supported by said body and surrounding said orifice.
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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) | 1993-05-14 | 1993-11-13 | 1994-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-14 | 1997-11-13 | 1998-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-14 | 2001-11-13 | 2002-05-15 | $7700.00 | Window Closed / Lapsed |