Vacuum cleaner having two cyclonic cleaning stages

a vacuum cleaner and cyclonic technology, applied in the field of vacuum cleaners, can solve the problems of turbulent pressure loss, difficult to clear blockages, increase the cost and complexity of the product manufacturing,
US20060137310A1Inactive Publication Date: 2006-06-29CONRAD WAYNE ERNEST +1
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
CONRAD WAYNE ERNEST
Publication Date
2006-06-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

A vacuum cleaner has a first and second cyclonic cleaning stages in series. The second cyclonic cleaning stage has a plurality of second stage cyclones. A conduit connects the first cyclonic cleaning stage outlet and the second stage cyclone inlets.
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Description

[0001] This application is a continuation of application Ser. No. 11 / 036,609 filed on Jan. 18, 2005 which is a continuation of Ser. No. 10 / 828,250 filed on Apr. 21, 2004 which is a continuation of U.S. patent application Ser. No. 09 / 679,353 filed on Oct. 5, 2000 which is a division of application Ser. No. 09 / 239,860 filed on Jan. 29, 1999 now issued as U.S. Pat. No. 6,334,234, which is a continuation-in-part of application Ser. No. 09 / 227,534 filed on Jan. 8, 1999 now issued as U.S. Pat. No. 6,141,826.FIELD OF THE INVENTION

[0002] The present invention relates generally to vacuum cleaners having at least two cyclonic separation stages. BACKGROUND OF THE INVENTION

[0003] Various types of vacuum cleaners are traditionally produced. These include built in vacuum cleaners, canister vacuum cleaners and upright vacuum cleaners. Upright vacuum cleaners have a ground engaging portion and an upwardly extending portion. The ground engaging portion typically has wheels for movement of the clea...

Claims

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