B - Operations – Transporting – 08 – B
Patent
B - Operations, Transporting
08
B
15/38.4
B08B 9/04 (2006.01) B08B 5/04 (2006.01)
Patent
CA 2015631
A B S T R A C T A method for cleaning, of ventilation ducts. This method comprises using vacuum for creating a strong air stream of high velocity which is used for passing a cleaning element through the duct. This cleaning ele- ment could comprise a brush or a ball of foam rubber or like which can adapt is shape to the cross section of the duct. When passing through the duct the element sweeps the inner surfaces of the dust and then loosens dirt adhering thereto. The method is completed with a treatment of the walls with a desinfactant and/or water stream which may conatain a grease solvent.
Fetherstonhaugh & Co.
Wallen Per I.
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