Microwave oven with oscillating magnetron

Patent metadata

Field	Value
Publication number	US-10383183-B2
Application number	US-201615369116-A
Country	US
Kind code	B2
Filing date	Dec 5, 2016
Priority date	Dec 5, 2016
Publication date	Aug 13, 2019
Grant date	Aug 13, 2019

Abstract

A microwave oven is disclosed herein that includes a cooking cavity and a magnetron. The magnetron includes a body portion having an anode, a cathode, one or more magnets, and an antenna extending from the body. The antenna directs microwaves generated by the body to the cooking cavity. The magnetron is movably coupled to a housing surrounding the cooking cavity and the magnetron. For example, in one embodiment, the magnetron oscillates along three perpendicular dimensions of mobility.

First claim

The invention claimed is:

1. A microwave oven, comprising:
a cooking cavity;
an magnetron comprising:
a body comprising an anode, a cathode, and one or more magnets; and
an antenna extending from the body that directs microwaves generated by the body to the cooking cavity;

a housing surrounding the cooking cavity and the magnetron; and
an oscillating mechanism coupling the magnetron to the housing, the oscillating mechanism comprising:
a motor fixedly coupled to the housing;
a cylindrical collar having a sloped end and a flat end, the flat end fixedly coupled to the motor;
a transmission shaft slidably coupled to the motor and passing through the cylindrical collar, the transmission shaft having an angled foot extending at least partially perpendicularly to the transmission shaft, wherein the foot is rotatably coupled to the magnetron, and wherein the foot comprises an angled surface complementary to the sloped end of the cylindrical collar; and
a compression spring disposed in the cylindrical collar around the transmission shaft, the compression spring coupled to the transmission shaft, the collar, or both.

2. The microwave oven of claim 1 , wherein the magnetron oscillates along three perpendicular dimensions of mobility.

3. The microwave oven of claim 1 , the cylindrical collar comprising a first slot along an interior wall of the cylindrical collar, the interior wall having a circumference, the compression spring comprising an outwardly-bent end extending into the first slot, wherein the first slot has a height greater than or equal to a diameter of a wire that forms the compression spring.

4. The microwave oven of claim 3 , wherein the first slot runs along the entire circumference of the interior wall.

5. The microwave oven of claim 3 , wherein the first slot has a length along the circumference of the interior wall greater than or equal to the diameter of the wire.

6. The microwave oven of claim 3 , wherein the first slot has a length along the circumference of the interior wall less than or equal to 105% of the diameter of the wire.

7. The microwave oven of claim 3 , the first slot having a depth less than or equal to a depth from the cylindrical collar's interior wall to an exterior wall of the cylindrical collar.

8. The microwave oven of claim 3 , wherein the first slot has a height less than or equal to 105% of the diameter of the wire.

9. The microwave oven of claim 3 , wherein the first slot is disposed between the sloped end and the flat end.

10. The microwave oven of claim 3 , wherein the first slot is disposed along a side of the cylindrical collar having a length greater than a shortest side of the cylindrical collar, and wherein the first slot is disposed further from the flat end of the cylindrical collar than a furthest point of the shortest side of the cylindrical collar is disposed from the flat end.

11. The microwave oven of claim 1 , the transmission shaft comprising a second slot along an exterior surface of a portion the transmission shaft within the cylindrical collar, the compression spring comprising an inwardly-bent end extending into the second slot, wherein the second slot has a height greater than or equal to a diameter of a wire that forms the compression spring.

12. The microwave oven of claim 11 , wherein the second slot runs along an entire circumference of the exterior surface.

13. The microwave oven of claim 11 , wherein the second slot has a length along the circumference of the exterior surface greater than or equal to the diameter of the wire.

14. The microwave oven of claim 11 , wherein the second slot has a length along the circumference of the exterior surface less than or equal to 105% of the diameter of the wire.

15. The microwave oven of claim 11 , wherein the second slot has a height less than or equal to 105% of the diameter of the wire.

16. The microwave oven of claim 1 , wherein the compression spring is disposed between a first lip along an internal wall of the cylindrical collar and a second lip along an external surface of a portion of the transmission shaft disposed within the cylindrical collar.

17. The microwave oven of claim 1 , wherein the oscillation mechanism further comprises:
an air-tight, pressurized cavity disposed between a first lip extending inwards from an interior wall of the cylindrical collar and a second lip extending outwards from an exterior surface of a portion of the transmission shaft disposed within the cylindrical collar.

18. A microwave oven comprising:
a cooking cavity;
a magnetron comprising:
a body comprising an anode, a cathode, and one or more magnets; and
an antenna extending from the body that directs microwaves generated by the body to the cooking cavity;

a first infrared camera directed towards the cooking cavity and aligned along a first axis across the cooking cavity;
a second infrared camera directed towards the cooking cavity along a second axis across the cooking cavity and perpendicular to the first axis;
a controller having one or more hardware processors and hardware memory, the hardware memory having instructions stored therein that, when executed by the hardware processors, perform the steps of:
detecting a three-dimensional heat profile of an object being heated in the microwave oven using the infrared cameras;
adjusting a position of the magnetron based on the heat profile.

19. The microwave oven of claim 18 , the hardware memory further having instructions stored therein that, when executed by the hardware processors, perform the steps of:
receiving an object name for the object being heated in the microwave oven;
determining a size of the object based on the heat profile;
storing, in the memory, the object name, the size of the object, the heat profile, and a magnetron adjustment pattern based on adjustments made as the object is heated.

Assignees

• Hall David R
• Priddis Andrew
• Liddle Matthew
• Knight Jedediah
• Hall Labs Llc

Inventors

• Hall David R
• Priddis Andrew
• Liddle Matthew
• Knight Jedediah

Classifications

• H05B6/705

  using microwave tuning · CPC title

• Y02B40/146

  Cross-Sectional Technologies · mapped topic

• H05B6/664 Primary

  Aspects related to the power supply of the microwave heating apparatus · CPC title

• H05B6/645 Primary

  using temperature sensors · CPC title

• Y02B40/00

  Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers · CPC title