Ventilator by force of nature with pressurization conduit hood

Abstract

A wind-powered ventilator includes a pressurization conduit hood mounted on the periphery of a fan-less automatic directional type ventilator, or a worm gear type ventilator. The conduit hood is arranged to pressurize atmospheric wind, however feeble and minimal, and conduct the wind to produce a pressurization effect, causing a pressurized wind moment to pass directionally through the ventilator, there by achieving enhanced drafting efficiency without the intervention of artificial power sources.

I claim:  
     
         1 . A fan-less wind-powered ventilator assembly, comprising: 
 a ventilator arranged to exhaust air through an exhaust opening by force of natural wind; and    a pressurization hood mounted on a periphery of the ventilator, said pressurization hood having an outlet aligned with said exhaust opening such that wind passing through said pressurization hood passes said exhaust opening to draw said exhaust air out of said ventilator,    wherein said pressurization hood is arranged to increase a wind force passing said exhaust opening, without assistance of a fan, to thereby increase an amount of air drawn from said exhaust opening by said wind.    
     
     
         2 . A wind-powered ventilator assembly as claimed in  claim 1 , wherein said ventilator comprises: 
 an elbow draft pipe having first and second ends, the elbow draft pipe including a vertical first leg having an opening at the first end of the elbow draft pipe and a horizontal second leg having said exhaust opening at the second end of the elbow draft pipe, said first end being rotatably fitted in an opening in a chassis and said elbow draft pipe being arranged to rotate relative to said chassis within said chassis opening,    a generally cylindrical conduit hood installed on a perimeter of said elbow draft pipe, said conduit being attached to the ventilator by at least one axially extending rib, and    wherein a diameter of said generally cylindrical conduit hood at said outlet aligned with said exhaust opening at the second end of the elbow draft pipe is smaller than a diameter of said generally cylindrical conduit hood at an inlet end to thereby provide said pressurization effect.    
     
     
         3 . A wind-powered ventilator assembly as claimed in  claim 2 , wherein an axially extending, plate-shaped directional vane extends from a top of an outer wall of said conduit hood, said vane being arranged to cause said ventilator to automatically rotate to a predetermined position relative to a direction of said wind.  
     
     
         4 . A wind-powered ventilator assembly as claimed in  claim 1 , wherein said ventilator comprises: 
 an elbow draft pipe having first and second ends, the elbow draft pipe including a vertical first leg having an opening at the first end of the elbow draft pipe and a horizontal second leg having said exhaust opening at the second end of the elbow draft pipe, said first end being rotatably fitted in an opening in a chassis and said elbow draft pipe being arranged to rotate relative to said chassis within said chassis opening,    a generally cylindrical conduit hood installed on a perimeter of said elbow draft pipe, said conduit being attached to the ventilator by at least one axially extending rib, and    wherein a diameter of said generally cylindrical conduit hood at said outlet aligned with said exhaust opening at the second end of the elbow draft pipe is smaller than a diameter of said generally cylindrical conduit hood at an inlet end to thereby provide said pressurization effect, and    wherein an axially extending, plate-shaped directional vane extends from a top of an outer wall of said conduit hood, said vane being arranged to cause said ventilator to automatically rotate to a position wherein said inlet of said pressurization hood faces said wind.