Cleaning and liquid contact with solids – Processes – Using solid work treating agents
Reexamination Certificate
2006-04-13
2010-02-09
Deo, Duy-Vu N (Department: 1792)
Cleaning and liquid contact with solids
Processes
Using solid work treating agents
C015S304000, C015S387000, C015S406000
Reexamination Certificate
active
07658804
ABSTRACT:
A duct cleaning apparatus and method for cleaning and maintaining the interior of most types of ducts, including chimneys, air conditioning and heating ducts, dryer ducts, vents, plumbing and rain gutter ducts. The apparatus is made up of a flexible rope (24) connected to a cleaning brush (10) or tool further connected to a retrieval parachute (30). The flexible rope (24) can be extended through the use of additional attached ropes (26) to create an infinitely long cleaning apparatus. The cleaning brush (10) may be configured in a variety of sizes with differing configurations of bristles (14) or appendages for specific applications. The cleaning appendages are connected to a rope (24) or line B, the length of which extends beyond the length of the duct (12) to be cleaned. One end of the rope (24) or line A is connected to the parachute (30) adapted with a wind-expanded periphery greater than that of the perimeter of the inside wall (22) of the duct (12) to be cleaned. A method is described for preparing the duct (12) for cleaning with the brush (10) by threading a rope or line A through the duct (12) using the parachute (30) and applying a vacuum from a machine (36).
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Deo Duy-Vu N
Lessler Art
Lipson Gary
Muckelroy William L.
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