Apparatus for sensing whether food disposed on a raisable tray of a microwave oven contacts a heater
US5811768A · kind A · utility
4Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1997 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Feb 19, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B6/6411
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A microwave oven has a cooking chamber in which a tray is provided for supporting food to be cooked. The tray is rotatable and can be raised and lowered. Cooking can be performed by microwaves and/or an electric resistance heater disposed in the cooking chamber. A sensor disposed in the cooking chamber detects a condition wherein food on the rising tray is at a height corresponding to that of the heater. In response to the sensing of such a condition the heater is turned off, a mechanism for raising the tray is also turned off, and a warning is emitted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.