Dual filter vacuum cleaner apparatus

Details Dual filter vacuum cleaner apparatus Dual filter vacuum cleaner apparatus

2005-04-15

2008-10-21

Snider, Theresa T (Department: 3723)

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

C015S347000, C055S488000, C055SDIG003

Reissue Patent

active

RE040542

ABSTRACT:
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.

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