Roof environmental exhaust duct
OwnerJim Dexter, Richard Weinmaninventors
Life of this patent
Estimating the term…
Abstract
An environmental exhaust duct adapted to be mounted on a roof allows for exhaust gases to escape while preventing water and debris from entering the building. The exhaust duct has a flap which is closed over the duct by gravity, and which pivots upwards when exhaust gases are released. A cap over the duct prevents water and debris from entering the air shaft when the flap is open.
Claims8
An environmental exhaust duct adapted to allow passage of exhaust gases through an opening in the roof of a building or other horizontal surface, said exhaust duct comprising
- a hollow tubular member having first and second open ends, the first end adapted to be inserted into the opening from the outside and to extend through the opening for delivering exhaust gases from the building to the outside atmosphere, said second end having a smoothly sloping edge extending from a low point designated as the front of the tubular member to a high point designated as the back of the tubular member, first and second vertical support members extending upwards from the sloping edge and having free ends remote from the sloping edge, said vertical support members being symmetrically disposed about the high point;
- a flap pivotally mounted to the sloping edge of the back of the tubular member between the first and second vertical members such that the flap is gravity biased to close the open second end of the tubular member, wherein the flap is slightly larger than the open second end of the tubular member to prevent the flap from entering the tubular member in the closed position;
- and
- a conical cap attached to the free ends of the vertical supports and spaced apart from the flap to allow the flap to be pushed up by exhaust gases, wherein the cap extends horizontally beyond the tubular member to prevent water and debris from entering the building through the tubular member.
A building having a roof having inserted therethrough an environmental exhaust duct adapted to allow passage of exhaust gases through an opening in the roof, said exhaust duct comprising
- a hollow tubular member having first and second open ends, the first end adapted to be inserted into the opening from the outside and to extend through the opening for delivering exhaust gases from the building to the outside atmosphere, said second end having a smoothly sloping edge extending from a low point designated as the front of the tubular member to a high point designated as the back of the tubular member, first and second vertical support members extending upwards from the sloping edge and having free ends remote from the sloping edge, said vertical support members being symmetrically disposed about the high point;
- a flap pivotally mounted to the sloping edge of the back of the tubular member between the first and second vertical members such that the flap is gravity biased to close the open second end of the tubular member, wherein the flap is slightly larger than the open second end of the tubular member to prevent the flap from entering the tubular member in the closed position;
- and
- a conical cap attached to the free ends of the vertical supports and spaced apart from the flap to allow the flap to be pushed up by exhaust gases, wherein the cap extends horizontally beyond the tubular member to prevent water and debris from entering the building through the tubular member.
Dependencies are inferred from the claim text.