# US 2014/0197163 A1 · Microwave mode stirrer apparatus

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- Number: US 2014/0197163 A1
- Document ID: US20140197163A1
- Status: Published application
- Kind: A1
- Application number: 14/164,405
- Filed: 2014-01-27
- Published: 2014-07-17
- Earliest claimed: 2013-01-16
- Assignees: Standex International Corporation
- Applicants: Standex International Corporation
- Inventors: Neal Cooper
- Web page: https://patentgrep.com/patent/US20140197163A1

## CPC

- H05B 6/745: {Rotatable stirrers}
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL

## Abstract

A mode stirrer apparatus that enables a more effective heating pattern in the food that is to be cooked. Two mode stirrers located in opposite walls of the oven. Each mode stirrer is independently driven by a small gear motor that causes the mode stirrer to rotate in only one direction. The result of this mounting configuration is that the mode stirrers rotate in a counter-rotating fashion in relation to the food being cooked. The mode stirrer in this invention has a combination of radiating slots (which behave like a rod shaped dipole antenna) and large areas of angled/displaced metal.

## Claims

### Claim 1

A mode stirrer apparatus for a microwave oven with a heating cavity, wherein the heating cavity having at least two opposing side walls and the microwave oven having at least two magnetrons providing microwave energy to the heating cavity, said apparatus comprising:
a wave guide for each of said at least two magnetrons directing the microwave energy from said at least two magnetrons;
a rotating metallic antenna in communication with its corresponding wave guide with each rotating metallic antenna attached within one of said opposing side walls and rotating perpendicular to the side wall and in direction opposite to said rotating metallic antenna on the opposing side wall;
a metallic mode stirrer at one end of each rotating metallic antenna, wherein each said metallic mode stirrer minimizes the cross talk between the at least two magnetrons and wherein microwave energy in the heating cavity is evenly distributed as each said mode stirrer rotates.

### Claim 2 (depends on 1)

The mode stirrer apparatus of claim 1 wherein each said metallic mode stirrer being a thin plate and having a shape with two straight side edges perpendicular to one another with a third edge being arcuate shaped and with a center of rotation being substantially equidistant from each straight perpendicular edge.

### Claim 3 (depends on 2)

The mode stirrer apparatus of claim 2 wherein said arcuate third edge has a radius of approximately 3 inches.

### Claim 4 (depends on 2)

The mode stirrer apparatus of claim 2 wherein each said metallic mode stirrer further comprises a arcuate shaped slot wherein microwave energy radiates from said arcuate slot.