Adjustable duct assembly for fume and dust removal and...

Details Adjustable duct assembly for fume and dust removal and... Adjustable duct assembly for fume and dust removal and...

B - Operations, Transporting

08

B

B08B 15/00 (2006.01) B01D 46/10 (2006.01) F23J 11/02 (2006.01)

Patent

CA 2286884

An adjustable duct assembly for the collection of fumes, dust and the like comprises two duct sections connected end to end by a duct support system comprising two elongate arms pivotally connected, the arms attached to the adjacent ends of the ducts, externally. A counterbalance arm extends from the duct support of a lower or outer duct section beyond the pivot point of the elongate arms, to counterbalance the lower or outer arms. A filter arrangement may be associated with the duct assembly, consisting of a generally planar filter element within a housing. A travelling nozzle arrangement directs a stream of air in a direction countervailing the normal flow through the filter, for backwash cleaning of the filter. First and second drives propel the nozzle simultaneously across and along the filter, to provide full backwash cleaning coverage of the filter.

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