Open coil electric heating elements
US3943333A · kind A · utility
10Cited by
7References
2Claims
0Family size
Inventors
Key dates
| Filing date | Aug 23, 1974 |
| Grant date | Mar 9, 1976 |
| Priority date | — |
| Expiry date | Aug 23, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B3/16
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Our invention relates to open coil electric heating elements of conventional construction but treated to resist corrosion and to electrically insulate exposed metallic surfaces. In accordance with the invention, the component parts of the heater, except the coiled resistance wire and in some cases the supporting insulating bushings, are assembled and then coated with a silicone resin-based coating composition. The composition is applied in a flowable state to cover all exposed surfaces and fill all cracks and crevices to thereby prevent accumulation of moisture thereat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.