Method of making an improved polymeric immersion heating element with skeletal support and optional heat transfer fins
US6432344B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1998 |
| Grant date | Aug 13, 2002 |
| Priority date | — |
| Expiry date | Nov 4, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B2203/021
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.