Patent ID: 7617829
Filing Date: 2009-11-17
Classification: A47L,B01F,B08B

Abstract:
1. A method for cleaning the ductwork of an air distribution system having inlets and outlets, the method comprising the steps of: (a) permanently affixing a plurality of injectors along the ductwork wherein: (b) permanently connecting first and second distribution subsystems in flow communication with each of the mixing chambers; (c) blocking the inlets and outlets of the ductwork; (d) connecting: (e) pressurizing the first and second fluids in the first and second distribution subsystems; (f) controlling pressurization of the first and second fluids in the first and second distribution systems causing: (g) continuing conversion of the first and second fluids into the foam-like substance and injecting the foam-like substance into the ductwork until the ductwork is substantially simultaneously completely filled with the foam-like substance wherein all contaminants and debris in, and on internal surfaces of, the ductwork are absorbed and entrapped by the foam-like substance; and (h) subsequently removing: