Microwave field director structure with laminated vanes
US8426786B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 10, 2008 |
| Grant date | Apr 23, 2013 |
| Priority date | — |
| Expiry date | Feb 22, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24802
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A reusable self-supporting field director for use in a microwave oven is characterized by a plurality of vanes, with each vane extending radially outwardly from a central axis. Each vane is angularly adjacent to two other vanes and is attached to each other at their inner ends. Each vane has a predetermined thickness dimension. Each vane is formed from a pair of electrically non-conductive outer laminae, each having a predetermined coefficient of thermal expansion, and an inner core formed of an electrically conductive material. The core has a predetermined coefficient of thermal expansion that is different from the coefficient of thermal expansion of the outer laminae. The inner core and the outer laminae are arranged in a laterally symmetric fashion with the inner core being completely enclosed within the non-conductive outer laminae so that thermal expansion effects due to heating are equalized across the thickness of each vane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.