Air filtration device including filter change indicator

• US 20020040642A1
• Filed: 11/13/2001
• Published: 04/11/2002
• Est. Priority Date: 05/03/2000
• Status: Active Grant

• Current Assignee: Hamilton Beach/Proctor-Silex Incorporated (Hamilton Beach Brands Holding Co.)
• Original Assignee: Hamilton Beach/Proctor-Silex Incorporated (Hamilton Beach Brands Holding Co.)
• Inventors: Smith, Michael E., Pillion, Lawrence M.
• Granted Patent: US 6,508,868 B2
• Time in Patent Office: Days
• US Class Current: 96/424
• CPC Class Codes: B01D 2265/026 with means for avoiding false mounting
• CPC Class Codes: B01D 2273/30 Means for generating a circulation of a fluid in a filtration system, e.g. using a pump or a fan
• CPC Class Codes: B01D 46/0043 containing fixed gas displacement elements or cores
• CPC Class Codes: B01D 46/0086 Filter condition indicators
• CPC Class Codes: B01D 46/103 Curved filtering elements
• CPC Class Codes: B01D 46/4254 Allowing or improving visual supervision, e.g. lamps, transparent parts, windows
• CPC Class Codes: F24F 1/0071 with means for purifying supplied air perfuming or deodorising means F24F1/008
• CPC Class Codes: F24F 11/39 Monitoring filter performance
• CPC Class Codes: F24F 8/10 by separation, e.g. by filtering
• CPC Class Codes: F24F 8/108 using dry filter elements
• CPC Class Codes: F24F 8/158 using active carbon
• CPC Class Codes: Y10S 116/25 Air filter condition indicator
• CPC Class Codes: Y10S 55/34 Indicator and controllers

Abstract

An air filtration device for intake of atmospheric air, removal of contaminants from the atmospheric air, expulsion of filtered air, includes a housing configured for application directly to an electrical outlet and provides air intake from the front surface of the housing and air expulsion from the side of the housing to utilize a wall surface to disperse the filtered air. A filter change indicator is provided to communicate that a filter should be changed, and a filter orientation system is provided to allow proper orientation of the filter with respect to air flow.

Claims

1. An air filtration device for intake of atmospheric air, removal of contaminants from the atmospheric air, and expulsion of filtered air, said air filtration device comprising:

a housing;

an air flow path extending within the housing;

a filter located within said air flow path;

a date wheel rotationally mounted on said housing and including an outer surface, said outer surface including indicia, said indicia may be positioned at a plurality of set positions to indicate a time;

an indexing device associated with said date wheel releasably retaining said wheel at said set positions wherein positioning said wheel relative to said housing indicates when said filter should be replaced.

2. The air filtration device of claim 1 wherein the flow path extends from a first side of the housing to a second side of the housing.

3. The air filtration device of claim 1 wherein the first side is a front side of the housing.