Patent ID: 7668444

Claim:
A pipe heater encircled conduit device ( 1 ), comprising: a pipe heater ( 11 ) formed by a heating element ( 111 ) wrapped with a filament ( 112 ) having a high resistance and a hollow quartz inner tube ( 113 ) encompassing said heating element ( 111 ), both ends of said heating element ( 111 ) being connected to a respective electrode pin ( 114 ); an outer tube unit ( 12 ) having a hollow quartz outer tube ( 123 ) overlaying said pipe heater ( 11 ) in spaced relationship to define a heat transfer space (A) therebetween, said hollow quartz outer tube ( 123 ) having at least one inlet ( 121 ) and at least one outlet ( 122 ) formed through a wall thereof and being in fluid communication with said heat transfer space; and a pair of insulation members ( 124 ) respectively disposed at opposing ends of said outer tube unit to define closures for open ends of said inner tube ( 113 ) and said outer tube ( 123 ), a distal end of each electrode pin ( 114 ) of said pipe heater ( 11 ) extending through a respective insulation member ( 124 ) to an exterior of said insulation member ( 124 ) for connection with a power source.