(19)
(11) EP 0 457 287 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
02.01.1992 Bulletin 1992/01

(43) Date of publication A2:
21.11.1991 Bulletin 1991/47

(21) Application number: 91107823.6

(22) Date of filing: 15.05.1991
(51) International Patent Classification (IPC)5: F01N 3/28, F01N 1/12
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 18.05.1990 IT 4008190

(71) Applicant: Nieri, Guiseppe
I-57023 Cecina (Livorno) (IT)

(72) Inventor:
  • Nieri, Guiseppe
    I-57023 Cecina (Livorno) (IT)

(74) Representative: Gardi, Giuliano 
Gardipatent Palazzo Prora Via Giardini, 605
I-41100 Modena
I-41100 Modena (IT)


(56) References cited: : 
   
       


    (54) An anti-pollution device for treating the exhaust gases from internal combustion engines and burners in general, functioning also as exhaust silencer


    (57) The device, which serves both to control harmful emissions and to lower the noise levels of exhaust gases from internal combustion engines and burners in general, comprises a duct (3) created between the coils (4, 4') of a spiral element and open at either one or both ends; the element is fashioned in a material of low thermal conductivity, and the coiled surfaces exposed to the exhaust gases can be coated with catalytic materials capable of speeding up the reduction or oxidation of pollutants.






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