Abstract: A pair of housing side sections and a pair of circular housing end sections cooperate to define a cylindrical chamber containing a bladed rotary valve element mounted on a shaft that is journaled in the end sections. The side sections have semicylindrical surfaces that cooperate to provide the cylindrical wall surface of the chamber, and respective inlet and outlet passageways between the chamber and the exterior of the housing. The housing end sections have circular edge surfaces of the same diameter as that of the cylindrical chamber, and circumferential flanges projecting radially outwardly from the circular edge surfaces and received in circumferential recesses in the cylindrical wall of the chamber. The side housing sections have interengaging surfaces projecting radially outwardly from the chamber, and a device extending through the interengaging surfaces for securing all of the housing sections together.

Abstract: A modular furniture system is disclosed which consists of functional modules that can be oriented, stacked and interlocked to create different furniture assemblies. The modules include identical rectangular enclosures, one of which contains drawers and another a cupboard and retractable writing surface. The enclosures can be stacked one on top of the other with a portion of the uppermost enclosure supporting one end of an upper bunk bed module. Another support means supports the other end of the bunk bed. An apparatus is also disclosed for interlocking the stackable enclosures and the upper bunk bed end to the uppermost enclosure. A removable cover is provided for the exposed portion of the uppermost enclosure adjacent the end of the bunk bed. By varying the width of the removable cover, a shelf of variable area can be provided. One end of a lower bunk bed module can be positioned within the enclosure formed by the upper bed and its two end supports.