Patent ID: 6602128
Filing Date: 2003-08-05
Classification: B01L,F24F

Abstract:
A system for selectively creating a positive or negative pressure in a selected portion of the space of a room which comprises,at least one moveable room divider (10) in said room dividing the room into at least one first space and at least one second space, at least one opening in each said at least one room divider, a collar (20) in each said at least one opening, said collar extending from said at least one first space to said at least one second space, a flow duct (26) being connected to an end of each said collar (20) extending into said at least one second space, at least one air flow aperture, in a bottom surface of the flow duct, cover means (29) for closing said at least one air flow aperture, said cover means including means for releasably securing said cover means to a bottom surface of said flow duct (26) to cover and close said at least one air flow aperture therein a blower (22), and a blower duct (24) connected with an output end of said blower and to an end of said collar in said first space or with one end of said flow duct in said at least one second space.