Method of making an improved polymeric immersion heating element with skeletal support and optional heat transfer fins
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United States of America Patent
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Aug 13, 2002
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N/A
app pub date -
Nov 4, 1998
filing date -
Dec 29, 1994
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Abstract
Electrical resistance heating elements, hot water heaters containing such elements, and methods of preparing such elements are provided. The electrical resistance heating elements of this invention can be disposed through a wall of a tank for heating fluid, such as water. They include a skeletal support frame having a first supporting surface thereon. They also include a resistance wire wound onto the first supporting surface and preferably connected to at least a pair of terminal end portions. The support frame and resistance wire are then hermetically encapsulated and electrically insulated within a thermally-conductive polymeric coating. The skeletal support frame of this invention improves injection molding operations for encapsulating the resistance wire, and can include heat transfer fins for improving thermal conductivity.
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