Abstract: A floating connector system is provided for airtight sealing between a ceiling structure and a wall structure. The connector system comprises an elongate channel member which has a generally U-shaped cross section. The elongate channel member is attached to the ceiling structure such that the elongate channel member is supported by the ceiling structure and forms a continuous, airtight seal with the ceiling structure. An elongate cap member is attached to the wall structure to form the top edge of the wall structure. The cap member is received within the elongate channel member, with the sides of the cap member being spaced in flatwise orientation from the sides of said channel member. A pair of elongate, elastomeric seal members are positioned between the respective sides of the cap member and the channel member.

Abstract: A modular wall system including a plurality of wall panels removably attached between a floor and a ceiling by a head track assembly and a floor track assembly respectively. The wall panels include a core material covered on each face by a thin metal skin and are of sufficient strength and rigidity to allow their placement between the head and floor track assemblies without the requirement of stud members or the like. The head track and the floor track assemblies both comprise gasket elements which prevent the passage of microcontamination around the panel members, and the side surfaces of each panel member contains a gasket which abuts and seals against an adjacent panel member to prevent the flow of microcontaminants around the sides of the panel. The floor track assembly also comprises a fastening member which securely holds the bottom of the wall panel to prevent relative movement therewith.

Abstract: The present invention relates to a flow rate adjustment device which allows for adjustment of air flow through the fan without changing the rpms of the fan blades. In one embodiment, an adjustable plate is located in the center of the impeller and is movable in such a manner that various lengths of the blade edges are blocked from the intake air at the center of the impeller. In another embodiment of the invention, the plate is replaced by an inflatable blocking device which can be inflated to various degrees thereby blocking various lengths of the blade edges. In both embodiments, the blocking of the blade edges results in less intake air being exposed to the blades, and thus less air moves through the fan even though the rpms remain constant.