Patent ID: 7127855

Claim:
A vent for a roof, said vent ( 2 ) comprises: a box ( 4 ) shaped to be a substantially vertical chimney, in order to maximize an upward hot air flow out of the vent; said box having an upper box rim, said uppper box rim having sides; a translucent hatch, which extends beyond said upper box rim to provide overhangs of several inches and thereby provide rain protection at the upper box rim when said hatch is open; a hinge; said hinge having a pivot line ( 37 ); said pivot line located outside and distal from the upper box rim, for lifting said hatch at all sides of said upper box rim, to allow a breeze from any direction to venturi air from the chimney, without creating an air-scoop that would cause a downdraft, which downdraft would counteract the upward hot air flow; a heat-actuated lifter, for lifting the hatch above a preset temperature, for increasing a distance of lift at higher temperatures, for decreasing the lift distance at lower temperatures, and for closing said hatch below said pre-set temperature.