Electric resistance heating devices – Heating devices – Continuous flow type fluid heater
Patent
1997-06-17
2000-04-11
Paschall, Mark
Electric resistance heating devices
Heating devices
Continuous flow type fluid heater
392471, 219426, F24H 118
Patent
active
060496584
ABSTRACT:
A hot mix applicator having a hose for transporting heated flowable material, preferably hot mix material, that has an outer casing telescoped over a flexible inner conduit. Slidably, telescopically received within the conduit is tubing comprised a single strip of thin metal helically coiled such that adjacent edges engage to form axially compressible tubing which limits bending to resist conduit kinking and crush. The conduit is attached at each end to a fitting assembly with each fitting assembly immovably fixed by an outer collar to the casing for transmitting hose tension through the casing and away from the more fragile conduit. The casing is comprised of a rubber sidewall reinforced with wire for resisting kinking, crushing, and twisting. Preferably, there is a gap between the casing and conduit that helps insulate the conduit. Each fitting assembly preferably includes a swivel fitting at least partially received within the casing to insulate it. To heat flowable material within the tubing, heat element wiring is wrapped in a spiral around the conduit substantially the length of the hose. The collar overlies a bore in the casing through which the heat element wiring enters the hose for preventing the casing from splitting at the bore when it flexes and bends.
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Schave Floyd D.
Timme Donald L.
Campbell Thor S.
Crafco, Incorporated
Paschall Mark
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