ApplicationNo. 801470 filed on 02/18/1997
US Classes:392/441, Tank or container type liquid heater219/523, Housing, casing, or support insertable into material or space to be heated (e.g., immersion type)219/530, With heat storage or transfer means (vanes)392/496, With heat exchange fluid392/497Immersion heater details
ExaminersPrimary: Jeffery, John A.
Attorney, Agent or Firm
Foreign Patent References
International ClassF24H 001/00
AbstractA heating device for a fluid storage tank is provided. The heating device comprises a heat tube including first and second elongate hollow legs which are joined together at an angle relative to each other so as to enable fluid flow therebetween. The first and second hollow legs being at least partially filled with a heat transfer fluid and being adapted to be disposed in a fluid storage tank with one leg extending generally longitudinally relative to the tank and one leg extending generally transversely relative to the tank adjacent a bottom wall of the tank. A heater is arranged in an aperture adjacent one end of the first elongate hollow structure. A safety relief valve can also be arranged on the heat tube so as to enable venting of an excess pressure condition of the heat transfer fluid.
Field of SearchTank or container type liquid heater
With heat exchange fluid
Immersion heater details
With internally positioned heating element
With particular mounting means
Housing, casing, or support insertable into material or space to be heated (e.g., immersion type)
Rigid tubular housing, casing, or support (e.g., flattened tube)
With heat storage or transfer means (vanes)
With heat storage or transfer means (e.g., fins or plate)