Filter assembly

The invention provides a filter assembly for use in a vacuum cleaner having a first filter portion that includes a foam filter, and a second filter portion located downstream of the first filter portion and containing a HEPA grade filter medium, the first and second filter portions being held direct...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	STORER MARK PETER
Format:	Patent
Sprache:	eng
Schlagworte:	COFFEE MILLS DOMESTIC ARTICLES OR APPLIANCES DOMESTIC WASHING OR CLEANING FURNITURE HUMAN NECESSITIES PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION SPICE MILLS SUCTION CLEANERS IN GENERAL TRANSPORTING
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Beschreibung
Zusammenfassung:	The invention provides a filter assembly for use in a vacuum cleaner having a first filter portion that includes a foam filter, and a second filter portion located downstream of the first filter portion and containing a HEPA grade filter medium, the first and second filter portions being held directly adjacent one another. The first filter portion also includes an electrostatic filter located on a side of the foam filter facing the second filter portion. The foam filter of the first filter portion is, in use, exposed directly to a dust-laden airflow. The provision of the electrostatic filter on the foam filter eliminates the possibility of dust initially retained by but later released from the foam filter escaping from the first filter portion.