(19)
(11) EP 0 032 880 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
05.08.1981 Bulletin 1981/31

(43) Date of publication A2:
29.07.1981 Bulletin 1981/30

(21) Application number: 81830006

(22) Date of filing: 19.01.1981
(84) Designated Contracting States:
AT BE CH DE FR GB IT LI LU NL SE

(30) Priority: 21.01.1980 IT 5285080

(71) Applicant: Baldessari, Arnaldo
 ()

(72) Inventor:
  • Baldessari, Arnaldo
     ()

   


(54) A preheating device for preliminary heating the liquid of the cooling circuit of a motor-vehicle engine


(57) A preheating device for preliminary heating the liquid of the cooling circuit of a motor-vehicle engine comprising a heater (10) formed by a massive metallic cylindrical body (14) having an axial through cavity (20) adapted to be connected to the cooling circuit of the engine and two axial bores (22) each containing an armored heating resistor (24), an electric pump (12), and an electric feeding circuit (50, 51, 52, 54) for connecting the device to an electrical source disposed outside the motor-vehicle. The electric circuit comprises a switch controlled by a programmable timer (54).






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