Thermostatically controlled electric heating device for motor ve

Details Thermostatically controlled electric heating device for motor ve Thermostatically controlled electric heating device for motor ve

1983-09-09

1985-04-02

Bartis, A.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

1525005, 137341, 219296, 219308, 2221465, 239133, 239135, 239184, B60S 146, B67D 562, H05B 102, F24H 110

Patent

active

045089574

ABSTRACT:
An electric heating device for heating motor vehicle glass washing fluid includes a pair of plate-like non-metallic body elements each having a spiral channel formed therein and sealingly closed by a copper cover plate. The cover plates are juxtaposed and sandwiched therebetween an electric heating element in the form of a PTC thermistor connected to the vehicle battery through a suitable switch. A thermostat is connected in series with the thermistor and is mounted on and responsive to the temperature of one of the cover plates. The thermistor is calibrated to reach a temperature substantially higher than the desired fluid temperature to ensure rapid heating of the fluid and the thermostat as activated at the desired fluid temperature to prevent overheating of the fluid. The spiral channels are connected in series at one end and the opposite ends thereof are connected, respectively, to a washing fluid reservoir and spray nozzles for spraying heated fluid on the vehicle glass. The fluid being heated may be pumped through the spiral channels by a pump mounted on the device and having an impeller located in a chamber formed in one of the body elements.

REFERENCES:
patent: 941215 (1909-11-01), Wade
patent: 1523156 (1925-01-01), Adams
patent: 2833909 (1958-05-01), Levey
patent: 3338476 (1967-08-01), Marcoux
patent: 3891827 (1975-06-01), Wyse
patent: 4177375 (1979-12-01), Meixner
patent: 4212425 (1980-07-01), Schlick
patent: 4430994 (1984-02-01), Clawson et al.

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