|4989503||Wind controlled roof ventilation system|
A wind-directed ventilator hood assembly for a narrow elongated air exit opening in the roof of a farm building spanning a long portion of the roof, including hood supporting uprights projecting upwardly from the air exit opening at plural spaced location...
A chimney turncap is provided with interior lower drains (14) for guiding condensed water to a collector tray (6) located in the warm zone of the chimney top, whereby the water disappears by evaporation. The hood portion (8) is a semitubular element havin...
|4320697||Chimney ventilating cap|
A chimney ventilating cap for the evacuation of combustion gas from chimneys. The cap comprises a spherical hollow dome body defined by a forward and a rear partly semi-spherical body portion. The front and rear body portions are secured together in a spa...