Gas separation – Combined or convertible – In vented container
Reexamination Certificate
1999-01-05
2001-04-10
Simmons, David A. (Department: 1724)
Gas separation
Combined or convertible
In vented container
C055S471000, C055SDIG003, C248S670000, C248S316800, C388S838000
Reexamination Certificate
active
06214074
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an air purifier. More particularly, the present invention relates to an air purification device removably mountable under a kitchen cabinet or similar surface and having an ejectable filter mechanism for easy removal of the filter; and control circuitry to indicate variable blower speed.
2. Description of the Prior Art
Air purifiers are well known. Generally they include, within a housing, a motor that turns a blower that either draws or forces air through some filtration material, and may redirect the flow of air about the room.
However, it is usually the case that due to the construction of these devices, the filtration material is either inaccessible or difficult to access, requiring the user to open the housing to replace the filter, or to very deliberately withdraw the filter from within the housing.
The present invention overcomes the disadvantages of known air filters by providing an air purification unit with a simple, push button access to the filter, substantially ejecting the filter from it's housing.
In addition, known air purifiers are designed to be placed in a variety of locations, including free standing floor units, ceiling mounted, or wall receptacle mounted designs. Commonly, such units are mounted above a recessed ceiling. Consequently, the prior art air purifiers either require difficult and inaccessible permanent ceiling mounting, or space consuming placement on the floor, table or wall. The present invention overcomes the disadvantages discussed above by providing an air purifier with a mounting system that not only allows the unit to be placed under a cabinet, or any like flat surface, but also to be easily removed and/or replaced, without having to dismantle the unit's mounting.
Furthermore, the known air purifiers do not provide a visual speed indicator to allow the user to monitor blower speed. The present invention overcomes this disadvantage by providing an LED motor speed indicator and accompanying circuit to permit the user to monitor motor speed.
SUMMARY OF THE INVENTION
An air purifier which is removably mountable under a cabinet, or like surface, which employs an ejectable cartridge-type filter and which provides visual indication of the blower speed, constructed according to the present invention comprises a housing, including a housing base and a housing top cover. The housing encloses a motor, mounted on a blower frame which is axially connected to a circular blower. The blower draws air, vertically, through an air intake opening in the base, a cartridge-type filter, the motor frame, and discharges the purified air in a horizontal direction through an air exhaust opening in the housing top cover. The housing top cover is removably secured to a mounting bracket which may be positioned on a bottom surface of a cabinet. The mounting bracket lockingly engages along the outer edges of the housing top cover and includes a releasable mounting latch to unlock the mounting mechanism. In the preferred embodiment the filter can be ejected, through a filter door in the housing top cover, for removal and replacement. In order to eject the filter, the air purifier includes a filter ejection assembly, which is selectively operated by a push button switch located on the exterior of the housing. A motor speed indicator circuit provides a visual indication, via a plaurality of LED's, of the speed of the motor driven blower.
These and other advantages of the invention will be further understood and appreciated by those skilled in the art by reference to the following written description, claims and appended drawings.
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Hsu Johnson
Ratsimor Anatoly
Sherwood Robert
Silviera Rick
Hoffmann & Baron , LLP
Marino Francis E.
Prince Fred
Simmons David A.
The Holmes Group, Inc.
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