US4901784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas atomizer for spray casting
Assignee: Olin Corp
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Filing: 1989-03-29
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Granted: 1990-02-20
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Expires: 2009-03-29
Abstract
Abstract A gas-atomizing system for spray casting a spray of molten metal on a moving substrate in which the gas atomizing device is in the form of an annulus having a central opening therethrough through which the molten metal to be atomized flows. The annulus is provided with a plenum chamber which communicates with elongated openings on the bottom surface of the annulus. The manifold and outlets are so arranged that a divergent conical spray pattern is produced having a central axis inclined with respect to the vertical axis of the molten metal stream in a direction downstream of the moving substrate upon which the spray material is deposited.
Inventors
- 👤 Sankaranarayanan Ashok
- 👤 Harvey P. Cheskis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:19
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: 27
Claim 1
Independent Claim
157 words
In a molten metal gas-atomizing spray-deposition apparatus, the combination comprising: (a) means for producing a stream of molten metal; (b) a gas atomizer for converting said stream of molten metal into a divergent spray pattern, said gas atomizer including an annulus through which said stream of metal flows, said annulus having a plenum chamber therein for receiving pressurized atomizing gas, (c) outlets in said annulus communicating with said plenum chamber and spaced around the stream of molten metal, and (d) a substrate moving in a given direction and having a spray deposit receiving area in a plane substantially perpendicular to the axis of the stream of the molten metal passing through said annulus, the arrangement of said outlets and manifold being such that the central axis of the divergent spray pattern produced by the atomizing gas acting upon the molten stream is inclined with respect to the moving substrate in a direction downstream of the moving substrate.
Claim 2
Dependent Claim
157 words
In a molten metal gas-atomizing spray-deposition apparatus, the combination comprising: (a) means for producing a stream of molten metal; (b) a gas atomizer for converting said stream of molten metal into a divergent spray pattern, said gas atomizer including an annulus through which said stream of metal flows, said annulus having a plenum chamber therein for receiving pressurized atomizing gas, (c) outlets in said annulus communicating with said plenum chamber and spaced around the stream of molten metal, and (d) a substrate moving in a given direction and having a spray deposit receiving area in a plane substantially perpendicular to the axis of the stream of the molten metal passing through said annulus, the arrangement of said outlets and manifold being such that the central axis of the divergent spray pattern produced by the atomizing gas acting upon the molten stream is inclined with respect to the moving substrate in a direction downstream of the moving substrate.
Claim 3
Dependent Claim
37 words
The apparatus of claim 2 wherein the inclination of the central axis of the spray pattern is such that the upstream portion of the spray pattern travels a lesser distance to the substrate than the downstream portion.
Claim 4
Dependent Claim
46 words
The apparatus of claim 1 wherein the pressure of the atomizing gas exiting from the outlets positioned upstream of the axis of the molten stream in respect of the moving substrate is higher than the pressure of the gas exiting from the outlets positioned downstream thereof.
Claim 5
Dependent Claim
44 words
The apparatus of claim 1 wherein the axes of said outlets positioned upstream of said molten stream in respect to said moving substrate have a greater angle with respect to the axis of the molten stream than the axes of the outlets positioned downstream.
Claim 6
Dependent Claim
34 words
The apparatus of claim 1 wherein the exit of said outlets positioned upstream of said molten stream in respect to said moving substrate are closer to said molten stream than the outlets downstream thereof.
Claim 7
Dependent Claim
60 words
The apparatus of claim 1 wherein said annulus has a central axis, said outlets being spaced around and at equidistances from said central axis, said axis of said annulus being tilted with respect to the axis of said molten stream such that the upstream portion of the annulus in respect to the moving substrate is positioned closer to said substrate.
Claim 8
Dependent Claim
37 words
The apparatus of claim 6 wherein said annulus includes a planar bottom surface perpendicular to said central axis, said outlets being positioned on said bottom surface are having axes equally inclined with respect to said bottom surface.
Claim 9
Dependent Claim
18 words
The apparatus of claim 7 wherein said annulus is circular in a cross-section perpendicular to its central axis.
Claim 10
Dependent Claim
59 words
The apparatus of claim 1 wherein said annulus has a central axis coincident with the axis of said molten stream, said annulus including a planar bottom surface, said outlets being positioned on said bottom surface, said bottom surface being inclined downwardly with respect to a plane perpendicular to said central axis in a direction upstream of said moving substrate.
Claim 11
Dependent Claim
19 words
The apparatus of claim 9 wherein said annulus is circular in a cross section perpendicular to said central axis.
Claim 12
Dependent Claim
52 words
The apparatus of claim 1 wherein said annulus has a central axis, said outlets being spaced around and at equidistances from said central axis, said central axis being offset with respect to the axis of said molten stream passing through said annulus in a direction downstream in respect to the moving substrate.
Claim 13
Dependent Claim
37 words
The apparatus of claim 11 wherein said annulus includes a planar bottom surface perpendicular to said central axis, said outlets being positioned on said bottom surface and having axes equally inclined with respect to said bottom surface.
Claim 14
Dependent Claim
52 words
The apparatus of claim 1 wherein said annulus has an opening therethrough for the passage of said molten stream, said opening having an axis coincident with the axis of said molten stream, said annulus being elongated from said axis of said opening in a direction downstream in respect to said moving substrate.
Claim 15
Dependent Claim
51 words
The apparatus of claim 13 wherein said outlets on the downstream side of said opening in respect to said moving substrate are at progressively greater distances from said axis of said opening in a downstream direction than the outlets on the upstream side are from the axis of the central opening.
Claim 16
Dependent Claim
21 words
The apparatus of claim 14 wherein said outlets on said upstream side are positioned equidistant from the axis of said opening.
Claim 17
Dependent Claim
37 words
The apparatus of claim 14 wherein said annulus includes a planar bottom surface perpendicular to said central axis, said outlets being positioned on said bottom surface and having axes equally inclined with respect to said bottom surface.
Claim 18
Dependent Claim
124 words
The apparatus of claim 1 wherein said annulus has a central axis coincident with the axis of said molten metal flowing therethrough, said plenum chamber being divided into two sections, one section being upstream of said central axis in respect to said moving substrate, and the other section being downstream with respect to said central axis, a first set of outlets positioned on said annulus upstream of said central axis and communicating with said one section of said plenum chamber, a second set of outlets on said annulus on the downstream side of said central axis in communication with said other section, and means for admitting a higher pressure atomizing gas to said one section of said plenum chamber than to the other section.
Claim 19
Dependent Claim
37 words
The apparatus of claim 17 wherein said annulus includes a planar bottom surface perpendicular to said central axis, said outlets being positioned on said bottom surface and having axes equally inclined with respect to said bottom surface.
Claim 20
Dependent Claim
120 words
The apparatus of claim 1 wherein said annulus has a central axis coincident with the axis of said molten metal flowing therethrough, said plenum chamber being divided into two sections by a semipermeable membrane, one section being upstream of said central axis in respect to said moving substrate, and the other section being downstream with respect to said central axis, a first set of outlets positioned on said annulus upstream of said central axis and communicating with said one section of said plenum chamber, a second set of outlets on said annulus on the downstream side of said central axis in communication with said other section, and means for admitting atomizing gas to said one section of said plenum chamber.
Claim 21
Dependent Claim
37 words
The apparatus of claim 19 wherein said annulus includes a planar bottom surface perpendicular to said central axis, said outlets being positioned on said bottom surface and having axes equally inclined with respect to said bottom surface.
Claim 22
Dependent Claim
83 words
The apparatus of claim 1 wherein said annulus has a central axis coincident with the axis of said molten stream passing therethrough and a planar bottom surface perpendicular to said central axis, said outlets being positioned on said bottom surface and each having an axis, the axes of said outlets positioned upstream of said molten stream in respect to said moving substrate having a greater angle with respect to said axis of said molten metal than the axes of said outlets positioned downstream.
Claim 23
Dependent Claim
112 words
The apparatus of claim 1 wherein said annulus has a central axis coincident with the axis of said molten stream passing therethrough, said outlets being spaced around and at equidistances from said central axis, the openings of said outlets on the downstream side of said central axis in respect to said substrate having elongated openings diverging outwardly along their axes in an outward direction, the outlets on the upstream side having a diameter less than the largest diameter of the openings in the outlets on the downstream side whereby the gas exiting from said outlets with the larger openings is at a lower pressure than the gas exiting from the other outlets.
Claim 24
Dependent Claim
37 words
The apparatus of claim 22 wherein said annulus includes a planar bottom surface perpendicular to said central axis, said outlets being positioned on said bottom surface and having axes equally inclined with respect to said bottom surface.
Claim 25
Dependent Claim
48 words
The apparatus of claim 1 wherein said annulus has a central axis coincident with the axis of said molten metal passing therethrough, said annulus having a-greater number of outlets on the upstream side of the central axis in respect to the moving substrate as on the downstream side.
Claim 26
Dependent Claim
15 words
The apparatus of claim 24 wherein said outlets are spaced equidistant from said central axis.
Claim 27
Dependent Claim
37 words
The apparatus of claim 25 wherein said annulus includes a planar bottom surface perpendicular to said central axis, said outlets being positioned on said bottom surface and having axes equally inclined with respect to said bottom surface.
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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) | 1993-02-19 | 1993-08-21 | 1994-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-19 | 1997-08-21 | 1998-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-19 | 2001-08-21 | 2002-02-20 | $7700.00 | Window Closed / Lapsed |