Tubular heating element with conical heating coil
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United States of America Patent
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May 26, 2009
Grant Date -
Nov 9, 2006
app pub date -
Apr 18, 2006
filing date -
Apr 25, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A tubular heating element for heating fluid media, in particular for household appliances, comprising a jacket pipe inside which there is disposed at least one heating coil made of an electrical resistance heating wire and embedded in an electrical insulation material, the heating coil having a first and a second terminal portion by means of which the heating coil is connected to a source of current via at least one connection element at each end, and at least one operating portion extending between the two terminal portions of the heating coil. It is further specified that the diameter of said heating coil increases at at least one terminal portion in the direction of the operating portion.
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