A dual filter arrangement for a vacuum cleaner for filtering particles of
dust and debris from an airflow passing through the vacuum cleaner. The
dual filter comprises a coarse pre-filter having an array of pores formed
therein of substantially uniform diameter and a fine primary filter which
is located rearwardly of the pre-filter in the direction of flow of the
airflow. The dual filter is releasably latched to a main housing portion
of the vacuum cleaner housing. A nose cone is removably secured to the
housing and circumscribes the dual filter assembly. The dual filter
enables even more efficient filtering of contaminants from dust and dirt
entrained air ingested by the vacuum cleaner. Attachment of the dual
filter to the main housing portion provides the additional advantage of
increasing the capacity of the nose cone and eliminating the need for the
user to handle the dual filter assembly when emptying contaminants
collected within the nose cone. A unique seal arrangement provides a
substantially airtight seal between the dual filter system and the main
housing to which it is secured.