Hart & Cooley, Inc.

Johan K Rademaker

Vent cap

A thermally powered change over diffuser for controlling the flow orientation of air discharged from a ceiling mounted duct outlet includes a pair of vanes pivotably mounted on a platform for scissor-wise movement between an open and a closed position, and a thermally responsive actuator. Discharge of cooled air from the duct causes the actuator to move the vanes together into the closed position, blocking the center of the flow path, and forcing the discharge air to exit in a substantially horizontal orientation. Discharge of heated air causes the actuator to move the vanes apart, into the open position, allowing warm air to flow vertically downwardly into a building space.

Thermally responsive air diffuser

Combined ceiling diffuser and air deflector pendulum for providing

An air deflector arrangement (100) is disclosed and adapted for use in ceilings and similar areas for selectively providing discrete air flow patterns in radial directions relative to the arrangement (100). The air deflector arrangement (100) comprises a perforated face (102) typically mounted in a downwardly-disposed configuration and coplanar with adjacent ceiling panels or the like. The face is latched or otherwise releasably connected to a somewhat frustum-shaped back panel (110) extending upwardly from the plane of the ceiling panels. A plurality of deflector blades (140) are pivotably secured to an eyelet fastener (160) connected at a central location on the face (102). Each of the deflector blades (140) is freely rotatable throughout a 360.degree. range of motion relative to each of the other blades. Selective blade configurations provide an infinite number of air flow patterns. The blades (140) are of a substantially optimum shape and size so as to produce distinct radial air flow patterns, while correspondingly maintaining sufficient 'open areas' so as to minimize static back pressures.

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West Olive, MI, United States of America

Johan K Rademaker