Immersion heater and method of manufacture

Details Immersion heater and method of manufacture Immersion heater and method of manufacture

1989-07-24

1991-05-07

Envall, Jr., Roy N.

Electric resistance heating devices

Heating devices

Immersion heater details

219437, 219523, H05B 304, H05B 348, H05B 378

Patent

active

050138901

ABSTRACT:
An immersion heater (1) for use in a chemically corrosive environment. An electrically conductive heating element (7) is immersible in the environment (C) and is capable of a watt-density of at least 30 watts per square inch when current flows through the element. A metallic sheath (9) covers the heating element. A coating (11) is applied over the sheath. The coating is capable of maintaining its coating properties not only when the heater is immersed in the environment, but also when the watt-density of the heating element exceeds 30 watts per square inch, and the temperature of the environment exceeds the boiling point of water.

REFERENCES:
patent: 4177320 (1979-12-01), Yoshimura et al.
patent: 4617456 (1986-10-01), Richards
patent: 4692592 (1987-09-01), Kale

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