Exhaust fan assembly having flexible coupling

Abstract From the Canadian patent

An exhaust assembly is provided for expelling contaminated air from a building. The , assembly includes a plenum a fan assembly attached to the plenum, and a windband mounted , on top of the fan assembly. The fan assembly is constructed of cylindrical outer and inner , walls which define a drive chamber and surrounding annular space. A fan driven by a motor , whose shaft extends downward from the drive chamber draws exhaust air from the plenum , and blows it up through the annular space to a nozzle at the top of the fan assembly. The , motor is pivotally mounted inside the assembly to provide access to the motor components , when it is desired to perform inspection and maintenance.