Dual filter wet/dry hand-held vacuum cleaner
First Claim
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1. A dual filter wet/dry hand-held vacuum cleaner picking up both liquids and solid particulates and providing exhaust air filtered of liquids and such comparatively-large solid particulates as dirt and dust and purified of such comparatively-small solid particulates as fine dust and allergens, comprising:
- a powered unit having a suction face, an exhaust port and a motor-driven fan drawing air into said suction face and exhausting the air that is drawn into said suction face out through the exhaust port thereof, an elongated dust bowl removably attached to the powered unit having an intake nozzle in fluid communication with the suction face that discharges an intake nozzle stream in which comparatively-large and comparatively-small solid particulates, and liquids, may have been entrained;
a first filter subassembly in the dust bowl responsive to the intake nozzle stream provided by said intake nozzle of said elongated dust bowl and adapted to discharge filtered air from which both liquids and comparatively-large solid particulates, that may have been entrained in said intake nozzle stream, have been removed, but in which comparatively-small solid particulates that may have been entrained in said intake nozzle stream remain; and
a second filter subassembly in the dust bowl responsive to said filtered air provided by said first filter subassembly and adapted to discharge purified air from which any comparatively-small solid particulates that remain entrained in said filtered air provided by said first filter subassembly have been removed;
whereby, said purified air, is drawn into said suction face of said powered unit, and discharged through said exhaust port of said powered unit, providing thereby exhaust air, filtered of liquids and such comparatively-large solid particulates as dirt and dust, and purified of such comparatively-small solid particulates as fine dust and allergens.
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Abstract
A dual filter wet/dry hand-held vacuum cleaner includes a two-stage filtration system effective to provide liquid and/or dry pick-up while minimizing the frequency with which it needs cleaned out that, at cleanup time, may be cleaned efficiently with little or no dust generation and minimal or no direct contact with accumulated grime.
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Citations
14 Claims
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1. A dual filter wet/dry hand-held vacuum cleaner picking up both liquids and solid particulates and providing exhaust air filtered of liquids and such comparatively-large solid particulates as dirt and dust and purified of such comparatively-small solid particulates as fine dust and allergens, comprising:
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a powered unit having a suction face, an exhaust port and a motor-driven fan drawing air into said suction face and exhausting the air that is drawn into said suction face out through the exhaust port thereof, an elongated dust bowl removably attached to the powered unit having an intake nozzle in fluid communication with the suction face that discharges an intake nozzle stream in which comparatively-large and comparatively-small solid particulates, and liquids, may have been entrained;
a first filter subassembly in the dust bowl responsive to the intake nozzle stream provided by said intake nozzle of said elongated dust bowl and adapted to discharge filtered air from which both liquids and comparatively-large solid particulates, that may have been entrained in said intake nozzle stream, have been removed, but in which comparatively-small solid particulates that may have been entrained in said intake nozzle stream remain; and
a second filter subassembly in the dust bowl responsive to said filtered air provided by said first filter subassembly and adapted to discharge purified air from which any comparatively-small solid particulates that remain entrained in said filtered air provided by said first filter subassembly have been removed;
whereby, said purified air, is drawn into said suction face of said powered unit, and discharged through said exhaust port of said powered unit, providing thereby exhaust air, filtered of liquids and such comparatively-large solid particulates as dirt and dust, and purified of such comparatively-small solid particulates as fine dust and allergens.- View Dependent Claims (2, 3, 4, 5, 13, 14)
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6. Cleaning apparatus that provides effective filtration of liquids and comparatively-large and comparatively-small solid particulates, comprising:
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a vacuum producing subassembly having a vacuum inlet opening in fluid communication with an air exhaust outlet opening; and
a two-stage filter subassembly intermediate the vacuum inlet opening and the air exhaust outlet opening of said vacuum producing subassembly, the first stage of said two-stage filter includes a first, stationary flow-through filter that is adapted to remove both comparatively-large solid particulates, and liquids, entering the vacuum inlet opening but to allow comparatively-small solid particulates to pass thereinthrough, and the second stage of said two-stage filter includes a second, stationary flow-through filter that is adapted to remove comparatively-small solid particulates entering the second stage from the first stage and to exhaust into the air exhaust outlet opening purified air, cleaned, in the first stage of the two-stage filter, both of comparatively-large solid particulates and liquids, and cleaned, in the second stage of the two-stage filter, of comparatively-small sold particulates. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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Specification