Dual filter vacuum cleaner apparatus

A hand held vacuum cleaner system comprising:

• a housing;
• an electric motor disposed within said housing;
• a fan driven by said electric motor for generating a suction airflow of air-entrained dirt and debris;
• a dual filter system including:
• a pre-filter for filtering coarse particles of dirt and debris from the dirt and debris entrained air;
• a primary filter for filtering fine particles of dirt and debris from the entrained air;
• said pre-filter forming an open ended box shape and said primary filter being adapted to rest nestably within said pre-filter;
• said primary filter further comprising a concertina shaped filtering material;
• and
• said housing and at least one of said pre-filter and primary filter including cooperating latching structure for mechanically interengaging to releasably secure said pre-filter and said primary filter to said housing.

A hand held vacuum cleaner for filtering particles of dust and debris from an airflow passing through the vacuum cleaner, comprising;

• a primary filter;
• a pre-filter nestably housed adjacent to the primary filter;
• and
• wherein, the primary filter is located downstream of the pre-filter in the direction of flow of the airflow.