Dual coil electric heating element
US11067288B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 9, 2018 |
| Grant date | Jul 20, 2021 |
| Priority date | — |
| Expiry date | Sep 15, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B3/748
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An embodiment of an electric heating element is disclosed, including an electrically resistive inner heating element, an electrically resistive outer heating element, and a thermostat positioned along a cold leg of the inner heating element. The thermostat is configured to selectively allow electrical current to be delivered to the inner heating element while maximum electrical current, for example, continues to be provided to the outer heating element. The thermostat cycles the electrical current on and off when detecting maximum and minimum desired temperatures radiated from the electric heating element. The inner heating element has a pair of cold legs that extend parallel to a pair of cold legs of the outer heating element, some or all of which may be supported by a terminal bracket.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.