Heating coil structures
US5296685A · kind A · utility
41Cited by
6References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1993 |
| Grant date | Mar 22, 1994 |
| Priority date | — |
| Expiry date | Apr 9, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B3/44
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A heating element formed from at least two wires twisted together. The twisted wires are preferably shaped in a helical configuration and mounted within a quartz tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.