....CHDEDK..FRGB....LI....SE......................RDIM350 (Ver 2.1 Jan 2001) 1620000/00810408EUROPEAN PATENT APPLICATIONA320010509EP97201516.819970521ItEnEnTO960118 U19960529IT20010509200119199712031997497 7F 24F 13/14 AdeKlappe für LüftungskanalenShutter for ventilation ductsfrVolet pour les conduites de ventilation1Climovent System s.a.s. di Franco Guazzone e C021115600632 EGuazzone e C, Climovent System s.a.s. di FrancoCorso Lombardia 4110078 Venaria Reale (Torino)ITGuazzone, Francovia Emilio Brusa 6110149 TorinoITSpandonari, Carlo, Dr. Ing.00045833Spandonari & Modiano s.r.l. corso Duca degli Abruzzi 1610129 TorinoITCHDEDKFRGBLISE20010509200119

A rigid, disk-shaped plate (10) is journaled along one diameter on an axis transversal to the duct and projects through at least one hole in the duct wall. Two studs (20, 34) are attached to one side of the plate in respective, diametrically opposite areas of its periphery, and overhang out of the plane of the plate so that a peripheral rim of the plate is left free on both sides. An inner groove of a rubber gasket (42) shaped as an annular band is sheathed on the rim. The studs have coaxial, cylindrical bosses (30, 40) which are rotatably receivable in respective holes in the wall of the duct.