Absorber device for microwave leakage
US4689460A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 1985 |
| Grant date | Aug 25, 1987 |
| Priority date | — |
| Expiry date | Dec 24, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B6/763
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A microwave absorber device for a microwave heater having a chamber for cooking with an opening, and a door for closing the opening with a small gap which is a leakage path between the door and the wall of the chamber. The door is provided with a choke cavity at the peripheral portions of the same, the choke cavity having an approximate 1/4 wavelength of length, and an entrance facing the leakage path. The choke cavity is provided with wave absorber which includes ferrite, and/or carbon, at an edge of the entrance or an edge of the cavity. The wave absorber closes also the leakage path. The entrance itself is sealed by dielectric material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.