Electrical heating element

Details Electrical heating element Electrical heating element

2007-06-12

2007-06-12

Paschall, Mark (Department: 3742)

Electric heating

Heating devices

With power supply and voltage or current regulation or...

C219S504000, C219S538000, C338S0220SD

Reexamination Certificate

active

11234980

ABSTRACT:
An electric heating element is provided with a durable PTC resistance made at least partially of an iron-based alloy, exhibiting stable characteristics to a temperature of 1500 DEG C. and having a resistance/temperature characteristic curve which substantially increases in a linear manner within a temperature range between an ambient temperature and 1500 DEG C. and can be used for a temperature control. The PCT resistance is provided with an oxidation resistant metallization or is gas-tightly enveloped by a jacket (2, 3, 12), a space between the jacket (2, 3, 12) and the PCT resistance (1,13) being filled with a powder or granules (14) which remove an important gas amount from the space.

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German Office Action; 103 14 218.5-34; 4 pp.
International Search Report; PCT/EP2004/003136; 13 pp.
International Preliminary Report; PCT/EP2004/003136; 10 pgs.

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