Abstract: An automated and adjustable air diffuser assembly for placement in a floor opening in a raised access flooring system having an air distribution plenum under the floor. The assembly comprises a fixed circular hanging frame member, a suspendable fixed frame member secured thereto, a removable grill member mounting a floating debris/liquid retention basin, and an electric motor operating a plurality of push rods to raise and lower the retention basin.

Abstract: A floor mounted adjustable airflow assembly for use with an underfloor air distribution or diffuser system. The assembly comprises a circular grate housing nesting a rotatable and removable, circular grate mechanism, where the assembly includes a cam riding, continuous sleeve that may be recessed by rotation of the circular grate mechanism for full air flow, or extended to close off air flow, or readily set at selected positions therebetween as a means to control air flow from an underfloor plenum to the space above the floor.

Abstract: An air diffuser assembly for use in combination with an underfloor air distribution system, where the system includes in part a cavity under a floor, having an upper surface, transmitting air under pressure to selected locations above the floor. The air diffuser assembly comprises first and second annular rings threadably engaging one another and secured respectively to above and below the floor, where the first annular ring includes an annular shoulder for receiving a grill assembly. The grill assembly is seated on the shoulder and is in communication with the space above the upper surface. The grill assembly further includes a centrally disposed, downwardly extending, vertically adjustable rod mounting a circular basket at its free end. The basket includes an array of through holes for delivering pressurized air from the underfloor cavity to the diffuser assembly, and means, such as a rod, connecting the basket to the grill assembly to prevent rotation of the basket.

Abstract: The invention concerns a regulator valve for stabilizing volume flow, especially in ventilation systems, with an adjustment flap (4) which is pivotable mounted in a flow conduit (2) and can be adjusted by a variable adjusting motor (12) and with a measuring probe (14) located in the flow conduit (1 resp. 2). In order that a reliable regulation and stabilization of the volume flow is possible independently of the arrangement and of the configuration of the conduit system upstream from the regulator valve, a turbulence grate (6) should be located upstream from the adjustment flap (4).