water heating element with encapsulated bulkhead

Details water heating element with encapsulated bulkhead water heating element with encapsulated bulkhead

1998-02-10

1999-11-02

Walberg, Teresa

Electric resistance heating devices

Heating devices

Immersion heater details

392497, F24H 912, H05B 340

Patent

active

059785500

ABSTRACT:
A water heating element (12) has an encapsulated bulkhead flange (16). The water heating element includes a heating coil (32) that is housed in an outer sheath (34). The bulkhead flange is secured onto the outer sheath at a sheath-to-bulkhead braze joint (42). A polymeric bulkhead flange seal (18) encapsulates the bulkhead flange, and extends sufficiently to keep the bulkhead flange and the brazing connection out of contact with water. The polymeric bulkhead flange seal includes a polymeric potting cup (44) that has a top (46), a bottom (48), and a sidewall (50). The bulkhead flange is received within and surrounded by the potting cup. The potting cup is filled with a potting material such that the potting (52) encapsulates the sides and bottom of the bulkhead flange. The potting cup includes standoffs (54) that space apart the bottom of the potting cup from a top (36) of the bulkhead flange, and the potting also covers a majority of the top of the bulkhead flange. The potting cup also includes integral curing sealing ridges (58, 60) to define an integral gasket.

REFERENCES:
patent: 3953707 (1976-04-01), Tanis
patent: 4208570 (1980-06-01), Rynard
patent: 5191634 (1993-03-01), Couch
patent: 5196673 (1993-03-01), Tanis
patent: 5586214 (1996-12-01), Eckman
Aquatemp Products Corporation, "A Handy-Dandy Guide to Heaters" (1996).

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