Roof ridge ventilator

Claim 1

A VENTILATOR ADAPTED TO EXTEND ALONG AND BE SECURED TO THE RIDGE OF THE ROOF OF A BUILDING, WHICH ROOF IS SUPPORTED BY RAFTERS SPACED LONGITUDINALLY OF THE ROOF RIDGE, AND WHICH VENTILATOR COMPRISES RELATIVELY T-SHAPED AND GENERALLY PLANAR SUPPORT PIECES FABRICATED FROM SHEET MATERIAL WITH INTEGRAL FLANGED EDGES AND HAVING CROSS PORTIONS AT THE TOP AND STEM PORTIONS EXTENDING DOWNWARDLY FROM THE MID-REGION OF THE CROSS PORTIONS, SAID STEM PORTIONS BEING ADAPTED TO BE SECURED TO SIDE SURFACES OF THE ROOF RAFTERS IN SPACED RELATIONSHIP TO ONE ANOTHER LONGITUDINALLY OF THE ROOF RIDGE AND WITH THEIR GENERAL PLANES DISPOSED LATERALLY OF THE ROOF RIDGE AND WITH SAID CROSS PORTIONS SPACED ABOVE THE ROOF, AN INTEGRALLY FORMED TOP COVER PIECE EMBRACING AND GRIPPING LATERALLY AND VERTICALLY SPACED EXTERIOR FLANGED EDGE SURFACES OF SAID CROSS PORTIONS OF A PLURALITY OF SAID SUPPORT PIECES AND INCLUDING PANEL PORTIONS ON OPPOSITE SIDES OF THE STEM PORTIONS, SAID PANEL PORTIONS HAVING AIR FLOW PASSAGES THEREIN, AND SEPARATE FLASHING PIECES ADAPTED TO BE SECURED TO THE ROOF ON OPPOSITE SIDES OF SAID STEM PORTIONS AND HAVING FLANGES WHICH EXTEND UPWARDLY ALONG OPPOSED FLANGE EDGES OF THE STEM PORTIONS TO THE CROSS PORTIONS AT BOTH THE TOP AND THE BOTTOM THEREOF AND PORTIONS WHICH EXTEND OUTWARDLY FROM THE STEM PORTIONS.