Patent ID: 7496284
Filing Date: 2009-02-24
Classification: H05B

Abstract:
1. A heating apparatus for heating a fluid, the apparatus comprising: (a) a tubular casing; (b) at least one electrical resistance heating wire, which is arranged in the interior of the tubular casing and which is embedded in an electrically insulating, heat-conducting insulating material in the tubular casing; (c) at least one connection unit which is arranged in the interior of the tubular casing and which is passed outwardly out of the tubular casing for connection of the electrical resistance heating wire to an electrical energy source disposed outside the tubular casing; (d) at least one closure bead, which closes the opening of the tubular casing, wherein the connection unit is also surrounded by the insulating material within the tubular casing to the closure bead, and wherein at its outside the closure bead is provided with at least one filling slot for filling of siliconized magnesium oxide as the insulating material into the tubular casing, which filling slot extends over its entire axial length of the closure bead.