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US 2009/0260179 A1Published application
Vacuum Cleaner
AssigneeBlack & Decker Inc.
InventorAndrew Walker
Life of this patent
Estimating the term…
Abstract
A portable vacuum cleaner having a fan which draws air inwards through inlet duct and inlet to coarse filter element. Larger dirt particles are trapped within coarse filter element, and the filtered air passes through fine filter element and into fan, where it is expelled through outlet duct and outlet aperture. A cleaning member mounted on the coarse filter element that engages the fine filter element so that upon remove of the coarse filter element, the cleaning member slides along the fine filter element removing particles thereon.
Claims13
A vacuum cleaner comprising:
- an inlet for entry of air;
- an outlet for exit of air;
- suction means for generating a difference in air pressure between the inlet and the outlet;
- a first filter for removing particles larger than a first particle size from air flowing from said inlet to said outlet;
- and
- a second filter for removing particles larger than a second particle size, smaller than said first particle size, from air flowing from said first filter to said outlet;
- wherein said first filter comprises a cleaning member mounted thereto and adapted to engage said second filter such that removal of the first filter causes the cleaning member to remove particles on said second filter.
4 more elements
A vacuum cleaner comprising:
- a housing having an air inlet and an air outlet;
- a motor in said housing;
- a first filter for removing particles larger than a first particle size;
- a second filter for removing particles larger than a second particle size, the second particle size being smaller than the first particle size;
- wherein air passes through the first filter before passing through the second filter;
- and
- a cleaning member mounted to the first filter and engaging the second filter, so that upon removal of the first filter from the housing the cleaning member removes particles on the second filter.
4 more elements
Dependencies are inferred from the claim text.