Patent ID: 7833308

Claim:
A filter assembly for use with an air flow inducing medical device comprising: a housing having a plurality of inlet openings and at least one outlet opening; a first chamber portion located within said housing and being in flow communication with a first inlet opening for receiving ambient air therethrough; a second chamber portion located within said housing and being in flow communication with a second inlet opening for receiving ambient air therethrough; a third chamber portion located within said housing and being in flow communication with said outlet opening; a first filter member disposed inside said housing and separating said first chamber portion from said third chamber portion; a second filter member disposed inside said housing and separating said second chamber portion from said third chamber portion; an outlet chamber portion located within said housing in flow communication with said third chamber portion such that ambient air passing through said third chamber portion will enter said outlet chamber portion, said outlet chamber portion being in flow communication with said at least one outlet opening; a partition positioned between said third chamber and said outlet chamber, the partition forming an opening through which air exiting said third chamber portion enters said outlet chamber portion; and an extension member for being coupled to an air flow inducing medical device, the extension member extending from an outer surface of said housing, the extension member being in flow communication with said at least one outlet opening, wherein said first and second chamber portions are disposed at the opposite sides of said third chamber portion in the housing, said third chamber portion being disposed between the first filter member and the second filter member, and ambient air passing through said first and second filter members can exit through said third chamber portion into said outlet opening such that said at least one outlet opening is the only outlet opening of the filtered air and the only air path into said at least one outlet opening is through one of said first and second filter members.