US4960458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wire feed system for flame spray apparatus having increased wire
Assignee: Individual
•
Filing: 1989-12-05
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Granted: 1990-10-02
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Expires: 2009-12-05
Abstract
Abstract In a combustion of plasma flame spray apparatus a tightly-packed array of individual wires or rods is fed into and through the plasma flame to heat, atomize and project against a surface to build up a coating thereon. The individual wires may be arranged as parallel strands or twisted together to form a cable. The wires are of circular diameters, and the twisted array of wires may be held together by a cement which is consumed when passing through the flame region. The cement may constitute a pyrophoric mixture such as a sheath surrounding the array of wires and consist of a stoichiometric mixture of two reactive metals including nickel and aluminum which react to form a nickel-aluminide.
Inventors
- 👤 James A. Browning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:43
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/16; B05B7/20; B05B7/201; B05B7/203
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
112 words
In a flame spray process including feeding material to be flame sprayed in and through a flame to heat, atomize and project the material against a surface to build up a coating of material on said surface, the improvement wherein said step of feeding material in and through flame comprises feeding said material in the form of a tightly-packed array of wires of circular cross-section whereby the heat transfer area-to-mass ratio of said material and the flame spray rate is significantly increased with droplet particle diameters significantly smaller than those produced under the same conditions from a single wire of circular cross-section of the same outer diameter as that of the array.
Claim 2
Dependent Claim
112 words
In a flame spray process including feeding material to be flame sprayed in and through a flame to heat, atomize and project the material against a surface to build up a coating of material on said surface, the improvement wherein said step of feeding material in and through flame comprises feeding said material in the form of a tightly-packed array of wires of circular cross-section whereby the heat transfer area-to-mass ratio of said material and the flame spray rate is significantly increased with droplet particle diameters significantly smaller than those produced under the same conditions from a single wire of circular cross-section of the same outer diameter as that of the array.
Claim 3
Dependent Claim
31 words
The method as claimed in claim 1, wherein said step of feeding a tightly-packed array of wires comprises feeding at least two individual wires arranged in side-by-side parallel peripheral contacting strands.
Claim 4
Dependent Claim
28 words
The method as claimed in claim 1, wherein said step of feeding a tightly-packed array of wires comprises feeding a cable of at least two individual wires together.
Claim 5
Dependent Claim
64 words
The method as claimed in claim 1, wherein said step of feeding a tightly-packed array of wires comprises feeding said wires in an array with strands formed thereby held together by a cement and said process further involves consuming the cement during passage into and through the flame with high heat transfer being effected from the combustion gases to the tightly-packed array of wires.
Claim 6
Dependent Claim
41 words
The method as claimed in claim 1, wherein a pyrophoric mixture is fed as a constituent part of the array of wires into said flame to increase the heat transfer rate from the combustion gases creating the flame to said array.
Claim 7
Dependent Claim
26 words
The method as claimed in claim 5, wherein said pyrophoric mixture constitutes a cementing agent cementing said at least two individual wires of said tightly-packed array.
Claim 8
Dependent Claim
24 words
The method as claimed in claim 5, wherein said pyrophoric mixture is fed into the flame as a sheath surrounding said array of wires.
Claim 9
Dependent Claim
28 words
The method as claimed in claim 5, wherein said pyrophoric mixture is a stoichiometric mixture of two reactive metals including nickel and aluminum which react to form nickel-aluminide.
References Cited (Backward Citations)
US4474604A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-01 | 1994-04-02 | 1994-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-01 | 1998-04-02 | 1998-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-01 | 2002-04-02 | 2002-10-02 | $7700.00 | Window Closed / Lapsed |