Electric resistance heating devices – Heating devices – Tank or container type liquid heater
Reexamination Certificate
2011-07-12
2011-07-12
Robinson, Daniel (Department: 3742)
Electric resistance heating devices
Heating devices
Tank or container type liquid heater
Reexamination Certificate
active
07978965
ABSTRACT:
The invention relates to a tank heater, especially for a urea tank of an internal combustion engine, comprising a housing (2) in which at least one PTC element is arranged, an electrical connecting cable (3, 4) that is joined to the PTC element so as to conduct a heating current through the PTC element, and an intake pipe (5) for conveying liquid. At least one section of the electrical connecting cable (5) is embodied as a resistive heating element which is connected in a thermally conducting manner to the interior of the intake pipe (5).
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