Selectively closable ventilation opening

Abstract

A ventilation assembly having a moveable trim moveable between an open position in which the moveable trim defines a gap with a ceiling trim to allow movement of fluid and a closed position in which the moveable trim is against or adjacent to the ceiling trim to eliminate or reduce the gap and prevent or limit fluid flow.

We claim: 
     
         1 . A ventilation assembly comprising:
 a main housing including an inlet through which air can be received into the main housing and an outlet through which air exits the main housing;   a blower situated in the main housing and operable to generate a flow of air; and   a trim assembly coupled with the main housing and comprising a moveable trim, the trim assembly being movable between a retracted position in which the moveable trim is adjacent the main housing to limit fluid flow through the main housing inlet and an extended position in which the moveable trim is farther from the main housing than in the retracted position to define a gap allowing air to flow through the main housing inlet;   wherein the blower is not operable to generate a flow of air when the moveable trim is in the retracted position.   
     
     
         2 . The ventilation assembly of  claim 1 , wherein the trim assembly further includes a ceiling trim, wherein in the retracted position the moveable trim is positioned near to the ceiling trim and in the extended position the moveable trim is positioned spaced apart from the ceiling trim to define a gap through which air can be drawn into the inlet of the main housing. 
     
     
         3 . The ventilation assembly of  claim 1 , wherein the trim assembly includes a baffle wall connected with the moveable trim for movement between the retracted and extended positions. 
     
     
         4 . The ventilation assembly of  claim 1 , further comprising an actuator configured to provide force to move the trim. 
     
     
         5 . The ventilation assembly of  claim 1 , further comprising at least one spring for biasing the trim assembly in a direction of one of the retracted and extended positions. 
     
     
         6 . The ventilation assembly of  claim 1 , wherein the trim assembly comprising a perimeter wall extending from an upper end and a lower end. 
     
     
         7 . The ventilation assembly of  claim 1 , the trim assembly further comprising a lighting element located in the moveable trim. 
     
     
         8 . The ventilation assembly of  claim 1 , wherein the moveable trim is configured to be located in an aperture in a ceiling such that the moveable trim is located adjacent the ceiling in the retracted position and spaced from the ceiling in the extended position. 
     
     
         9 . The ventilation assembly of  claim 8 , further comprising a ceiling trim arranged at an edge of the ceiling aperture and the moveable trim is located adjacent the ceiling trim in the retracted position and spaced from the ceiling trim in the extended position. 
     
     
         10 . The ventilation assembly of  claim 1 , wherein the moveable trim is configured to be located in an aperture in a ceiling, wherein space is left between the moveable trim and the ceiling aperture when the trim assembly is in the extended position and the blower is operable to draw air through the ceiling aperture. 
     
     
         11 . The ventilation assembly of  claim 1 , wherein the moveable trim is configured to be located in an aperture in a ceiling and the moveable trim is located adjacent the ceiling in the retracted position to limit or prohibit movement of air through the ceiling aperture. 
     
     
         12 . The ventilation assembly of  claim 1 , wherein the moveable trim is configured to be located in an aperture in a wall. 
     
     
         13 . The ventilation assembly of  claim 1 , wherein the moveable trim is configured to be located in an aperture in a ceiling and flush with the ceiling when the moveable trim is in the retracted position. 
     
     
         14 . The ventilation assembly of  claim 1 , wherein the moveable trim is configured as a flat panel to be located in an aperture in a ceiling and flush with the ceiling when the moveable trim is in the retracted position. 
     
     
         15 . A ventilation assembly comprising:
 a main housing including an inlet through which air can be received into the main housing and an outlet through which air exits the main housing;   a blower situated in the main housing and operable to generate a flow of air;   an actuation assembly situated in the main housing; and   a moveable trim movable by the actuation assembly between a retracted position in which the moveable trim is adjacent the main housing and an extended position in which the moveable trim is farther from the main housing than in the retracted position to define a gap permitting fluid flow into the main housing;   wherein the blower is not operable to generate a flow of air when the moveable trim is in the retracted position.   
     
     
         16 . The ventilation assembly of  claim 15 , a user interface configured to select one of the retracted position and the extended position. 
     
     
         17 . The ventilation assembly of  claim 15 , the moveable trim comprising a lighted panel. 
     
     
         18 . A ventilation assembly configured to be installed in a ceiling of a structure, the ventilation assembly comprising:
 a main housing including an inlet through which air can be received into the main housing and an outlet through which air exits the main housing;   a blower situated in the main housing and operable to generate a flow of air;   an actuation assembly situated in the main housing;   a ceiling trim configured to be located in an aperture in the ceiling; and   a moveable trim movable by the actuation assembly between
 a retracted position in which the moveable trim is adjacent to the ceiling trim to limit fluid flow through the ceiling aperture, and 
 an extended position in which the moveable trim is spaced farther from the main housing than in the retracted position to define a gap allowing fluid to flow through the ceiling aperture; 
   wherein the blower is not operable to generate a flow of air when the moveable trim is in the retracted position.   
     
     
         19 . The ventilation assembly of  claim 18 , a user interface configured to select one of the retracted position and the extended position. 
     
     
         20 . The ventilation assembly of  claim 18 , the moveable trim comprising a lighted panel.