Gas separation – Combined or convertible – In environmental air enclosure
Reexamination Certificate
1999-03-18
2001-01-16
Simmons, David A. (Department: 1724)
Gas separation
Combined or convertible
In environmental air enclosure
C055S467000, C055S484000, C055S486000, C454S187000
Reexamination Certificate
active
06174341
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a ceiling mounted air filtration system for use in areas having high concentrations of smoke and odor. More particularly, the present invention relates to ceiling mounted air filtration systems which includes a plurality of filter assemblies located at each return air inlet in a ceiling.
Ceiling mounted air filtration systems are well known in the art for cleaning air in a room and returning or recycling the cleaned air back into the room. For example, U.S. Pat. No. 4,955,997 teaches a flush mounted ceiling air cleaner which includes a cabinet with an enclosed blower and a plurality of filters where the inlet into the cabinet is in flow communication with supplied air from the room and the outlet from the cabinet is in flow communication with return air into a room. All of the filters in the air cleaning system are disposed within the cabinet.
SUMMARY OF THE INVENTION
The present invention provides a ceiling mounted air filtration system for use in removing heavy concentrations of smoke and odor in a confined environment.
The present invention further provides an air cleaning system which includes a blower which is remote from and in flow communication with a plurality of supply air inlets and a plurality of return air outlets which are disposed flush in a ceiling.
The present invention also provides an air filtration system including a plurality of filter assemblies wherein each filter assembly is mounted within the ceiling at each supply air inlet into the air filtration system.
The present invention even further provides an air filtration system including a plurality of filter assemblies including at least two filters at each air inlet grill or grid, the grills being flush mounted in a ceiling.
More particularly, the present invention provides a ceiling mounted air filtration system comprising: a housing having a blower therein, said housing having at least one air inlet and at least one air outlet; at least one filter assembly mounted in said ceiling, said at least one filter assembly being in flow communication with said at least one air inlet to said housing; and, at least one outlet grill mounted in said ceiling and being remote from and in flow communication with said at least one air outlet.
REFERENCES:
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patent: 4530272 (1985-07-01), Stokes
patent: 4658707 (1987-04-01), Hawkins et al.
patent: 4693175 (1987-09-01), Hashimoto
patent: 4721031 (1988-01-01), Nakata et al.
patent: 4955997 (1990-09-01), Robertson, III
patent: 4961764 (1990-10-01), Develle et al.
patent: 5236476 (1993-08-01), Klick
patent: 5531641 (1996-07-01), Aldrich
patent: 5690719 (1997-11-01), Hodge
patent: 5733190 (1998-03-01), Wahab
Hopkins Robert A.
Lamb Charles G.
Middleton & Reutlinger
Simmons David A.
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