Method of connecting a non-contaminating fluid heating element t

Details Method of connecting a non-contaminating fluid heating element t Method of connecting a non-contaminating fluid heating element t

1988-06-30

1989-10-24

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 86, 15624411, 156293, 219301, 219306, 219308, 219322, 174DIG8, B32B 3126

Patent

active

048759570

ABSTRACT:
A non-contaminating fluid heater includes a heater body having an inlet and an adjacent outlet at one end, a tube which channels entering fluids centrally through the heater body to a point distally spaced from the outlet, and a resistance heating element helically wound about the tube. A connector assembly permits lead wires to pass through the heater body, without inducing fluid leakage, for connecting the heating element to a power source. In order to form an environmental seal about the electrical connections, the heating element and the lead wires are each jacketed with a thermoplastic material, the wire and heating element portions adjacent the connection are surrounded by a sleeve of additional thermoplastic material, and this sleeve is, in turn, surrounded by thermally activated shrink tubing. By melting the thermoplastic materials surrounding the connections and heating the shrink tubing, the various layers of thermoplastic material are fused together to form a hermetic seal.

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patent: 4502214 (1985-03-01), Miles et al.
patent: 4617449 (1986-10-01), Weitzel et al.

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