Coating processes – Interior of hollow article coating – Coating by vapor – gas – mist – or smoke
Patent
1997-10-09
1999-11-09
Beck, Shrive
Coating processes
Interior of hollow article coating
Coating by vapor, gas, mist, or smoke
427238, 427239, 427236, 427421, B05D 722
Patent
active
059809841
ABSTRACT:
The invention is a method and device for sealing leaks remotely by means of injecting a previously prepared aerosol into the enclosure being sealed according to a particular sealing efficiency defined by the product of a penetration efficiency and a particle deposition efficiency. By using different limits in the relationship between penetration efficiency and flowrate, the same method according the invention can be used for coating the inside of an enclosure. Specifically the invention is a method and device for preparing, transporting, and depositing a solid phase aerosol to the interior surface of the enclosure relating particle size, particle carrier flow rate, and pressure differential, so that particles deposited there can bridge and substantially seal each leak, with out providing a substantial coating at inside surfaces of the enclosure other than the leak. The particle size and flow parameters can be adjusted to coat the interior of the enclosure (duct) without substantial plugging of the leaks depending on how the particle size and flowrate relationships are chosen.
REFERENCES:
patent: 4331722 (1982-05-01), Packo et al.
patent: 4454174 (1984-06-01), Koga et al.
patent: 4994307 (1991-02-01), Price et al.
"Particle Deposition in Aerosol Sampling Lines Caused by Turbulent Diffusion and Gravitational Settling," N. K. Anand and A. R. McFarland, Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843, published in Am.Ind.Hyg.Assoc.J.(50), Jun., 1989. pp. 307-312.
"Aerosol Deposition in Turbulent Pipe Flow," Benjamin Y. H. Liu and Timothy A. Llori, Particle Technology Laboratory, Mechanical Engineering Department, University of Minnesota, Minneapolis, Minn. 55455, published in vol. 8. No. 4, Apr. 1974, Enviromental Science & Technology, at pp. 351-356.
"Experimental Observation of Aerosol Deposition in Turbulent Flow," Benjamin Y. H. Liu and Jugal K. Agarwal, Particle Technology Laboratory, Mechanical Engineering Department, University of Minnesota, Minneapolis, Minnesota 55455, published in Particle Technology Laboratory Publication No. 206, first received Jul. 31, 1973; in revised form Sep. 3, 1973. pp. 145-155.
"Investigation of a Laminar Boundary-Layer Suction Slot," A.S.W. Thomas and K.C. Cornelius, Lockheed-Georgia company, Marietta, GA, as published in AIAA Journal, vol. 20, No. 6, Jun. 1982, at pp. 790-796.
Carrie Francois R.
Modera Mark P.
Beck Shrive
Biksa Janis
Chen Bret
Martin Paul
The Regents of the University of California
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