초록 ▼

A method of and apparatus for controlling air flow through the medium of a circular frame structure upon which is pivotally mounted a plurality of shutters, the frame being adapted to be secured to a ceiling of a room or space in which ceiling an opening has been cut to accommodate air flow and move

A method of and apparatus for controlling air flow through the medium of a circular frame structure upon which is pivotally mounted a plurality of shutters, the frame being adapted to be secured to a ceiling of a room or space in which ceiling an opening has been cut to accommodate air flow and movement of the pivotally mounted shutters. The circular frame structure and shutter assemblage is substantially flush with the plane of the ceiling and a housing and ventilating fan is disposed in an attic or space above the opening in the ceiling. The ventilating fan above the shutters is rotated in a direction to draw air from the room upwardly into the attic space for dissipation through conventional air vents located in the roof or wall region of an attic space. The circular support frame structure and the shutters are molded of resinous plastic material and the shutters are pivoted by pivot pins integral with the shutters which are pivotally mounted in the circular portion of the frame structure and in a central support means or region of the frame structure.

대표청구항 ▼

A shutter apparatus for istallation in an opening in the ceiling below the attic space of a house for controlling air flow from inside the house to the exterior of the house comprising, shutter support means including a frame structure of circular configuration mounted in said opening, a plurality o

A shutter apparatus for istallation in an opening in the ceiling below the attic space of a house for controlling air flow from inside the house to the exterior of the house comprising, shutter support means including a frame structure of circular configuration mounted in said opening, a plurality of sector-shaped shutters, means pivotally mounting each of the shutters on saids frame structure, said shutters in closed position obstructing the open area in said ceiling and being substantially in the plane of said ceiling, said shutter support frame structure being of molded resinous plastic material.