Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Jeffrey Hill0
Robert M. Witter0
Date of Patent
April 24, 2012
0Patent Application Number
121397050
Date Filed
June 16, 2008
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A shop vacuum cleaner has a series of dust separation stages, with the large majority of the dust being preseparated in a cyclonic separator and deposited into a first drum or barrel. The remaining dust is carried in the air stream is filtered out in a pre-filter in a second vacuum cleaner drum. A final filter cartridge is fitted onto the intake of the vacuum head. The vacuum cleaner machine exhausts clean, filtered air into the ambient.
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