Duct cleaning method

Details Duct cleaning method Duct cleaning method

1994-06-10

1995-12-05

Simmons, David A.

Cleaning and liquid contact with solids

Processes

Using solid work treating agents

134 21, 134 2211, 15314, 15383, 15395, B08B 104, B08B 504, B08B 904

Patent

active

054725143

ABSTRACT:
A method and apparatus for cleaning ducts such as used in HVAC systems includes as part of the apparatus a propeller having pitched, flexible blades for rotatably engaging the interior duct surface for dislodging soot and propelling a cloud of soot along the duct to an evacuation point. The method includes establishing a temporary block in the duct, moving the propeller along the duct for dislodging soot and generation a dust cloud, and evacuating the duct by drawing the soot cloud created by the propeller.

REFERENCES:
patent: 2976191 (1961-03-01), Weston
patent: 3485671 (1969-12-01), Stephens
patent: 4025360 (1977-05-01), Horne et al.
patent: 4141753 (1979-02-01), Greed
patent: 4792363 (1988-12-01), Franklin, Jr. et al.
patent: 5003998 (1991-04-01), Collett

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