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(11) | EP 0 234 925 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Ventilation device for building roofs |
(57) The device has a rectangular housing (2) defining a ventilation opening controlled
by flaps (5) pivotally movable about hinge axes (6) by means of a drive device (not
shown). The flaps (5) each consist of an elongated, flat, extruded hollow-section
body (102) of plastics material having a rear edge reinforcing tube (105) with a flange
extension (106) at the bottom and an inserted reinforcing section (108) at its underside
with two added bearing blocks (111) for a pivot drive. The pivot blocks (111) are
disposed close to the ends of the hollow-section body (102) and are connected at
their front end, to the reinforcing section (108) and at their rear end to the flange
extension (106) to form a reinforced skeleton for the flap. |