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Method for sealing remote leaks in an enclosure using an aerosol

United States Patent

5,980,984
November 9, 1999
View the Complete Patent at the US Patent & Trademark Office
Lawrence Berkeley National Laboratory - Visit the Technology Transfer and Intellectual Property Management Department Website
Aerosol Remote Sealing System
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.
Modera; Mark P. (Piedmont, CA), Carrie; Francois R. (Lyons, FR)
The Regents of The University of California (Oakland, CA)
08/ 947,921
October 9, 1997
The invention described herein was made with Government support under Contract No. DE-AC03-76SFOO098 between the U.S. Department of Energy and the University of California for operation of Lawrence Berkeley National Laboratory. The Government retains certain rights in this invention.