CA2253773C - Topless microwave cooking device - Google Patents
Topless microwave cooking device Download PDFInfo
- Publication number
- CA2253773C CA2253773C CA 2253773 CA2253773A CA2253773C CA 2253773 C CA2253773 C CA 2253773C CA 2253773 CA2253773 CA 2253773 CA 2253773 A CA2253773 A CA 2253773A CA 2253773 C CA2253773 C CA 2253773C
- Authority
- CA
- Canada
- Prior art keywords
- door assembly
- generally cylindrical
- cooking device
- cylindrical door
- microwave cooking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/76—Prevention of microwave leakage, e.g. door sealings
- H05B6/763—Microwave radiation seals for doors
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/6414—Aspects relating to the door of the microwave heating apparatus
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Electric Ovens (AREA)
Abstract
A microwave cooking device having a generally cylindrical door assembly opens to permit movement of a food container in upwardly vertical direction. The generally cylindrical door assembly has a rigid or flexible microwave-opaque screen so as to be opened and closed to reveal the interior chamber in sliding, folding, rolling, or rotational movement. A means for water molecules to escape from the interior chamber may be provided.
This invention relates to microwave cooking devices, more particularly to a microwave cooking device having a movable door.
This invention relates to microwave cooking devices, more particularly to a microwave cooking device having a movable door.
Description
Description Title Topless Microwave Cooking Device Technical Field This invention relates to microwave cooking devices, more particularly to a microwave cooking device having a movable door.
Background Art There are many instances where it would be desirable to be able to easily access a food product inside a food container in the interior chamber of a microwave cooking device while cooking is in progress in order to stir or agitate foods.
A large number of patents disclose microwave ovens for heating and cooking a food product, including those having a turn table.
These prior art arrangements have a flat door to access a food container in the interior chamber of a microwave cooking device from the front. Such configuration does not allow a food product inside the food container to be stirred or agitated during cooking without the food container being removed from the interior chamber of the microwave cooking device. In addition, the water molecules inside the interior chamber does not have an escape route directly above the food container.
Description of the Invention It is a primary object of the invention to provide a microwave cooking device that has a means for accessing a food product inside a food container in the interior chamber of a microwave cooking device without removing the food container from the microwave cooking device.
It is another object of the invention to provide a pans for water molecules to escape from the interior chamber even when the door is closed.
One aspect of the invention provides a microwave cooking device having a generally cylindrical door assembly which either slides, folds, rolls, or rotates to expose the food container in the interior chamber in order to allow the food container to be accessed from the top without obstruction. This configuration allows a food product inside the food container to be stirred or agitated during cooking without the food container being removed from the interior chamber of the microwave cooking device. After the cooking is terminated, the food container can be removed in upwardly vertical direction.
Preferably, the generally cylindrical door assembly comprises a rigid or flexible sheet made of perforated metal with a plurality of holes small enough to make the perforated door opaque to microwave energy.
Another aspect of the invention provides a means for water molecules to escape upwardly from the interior chamber, even when the door is closed, through the holes on the perforated door directly above the food container.
Brief Description of the Figures in the Drawings In drawings which illustrate embodiments of the invention:
Figure 1 marked "Prior Art" is a perspective view of a conventional microwave cooking device with a flat door being closed;
Figure 2 marked "Prior Art" is a perspective view of a conventional microwave cooking device with a flat door being partially open to expose a food container;
Figure 3 is a perspective view of a microwave cooking device according to the invention with a generally cylindrical door being closed;
Figure 4 is a perspective view of one embodiment of a microwave cooking device with a generally cylindrical door being partially open to expose a food container;
Figure 5 is a perspective view of another embodiment of a microwave cooking device with a generally cylindrical door being partially open to expose a food container;
Figure 6 is a perspective view of another embodiment of a microwave cooking device with a generally cylindrical door being partially open to expose a food container; and Figure 7 is a perspective view of another embodiment of a microwave cooking device with a generally cylindrical door being partially open to expose a food container.
Modes for Carrying Out the Invention In a conventional microwave cooking device shown in Figure 1 and Figure 2 both marked "Prior Art", a control panel 1 is located at one side of the front portion of the microwave cooking device.
A flat door assembly 2 is shown closed and partially open, respectively. The flat door assembly 2 opens and closes rotationally around a vertical axis on one front side of the microwave cooking device to expose a food container 4 placed at the bottom platform 3 in the interior chamber of the microwave cooking device. The food container 4 must be removed from the interior chamber in horizontal direction, as indicated by the arrow, so that the food product inside the food container 4 can be stirred or agitated.
According to the present invention shown in Figure 3, a control panel 1 is located at the bottom of the front portion of the microwave cooking device. A generally cylindrical door assembly 2 is shown closed in Figure 3. The food container 4 placed at the bottom platform 3 does not have to be removed from the interior chamber when the food product inside the food container 4 is to be stirred or agitated, as shown in Figure 4, Figure 5, Figure 6, and Figure 7. When cooking is terminated, the food container 4 can be removed from the interior chamber in upwardly vertical direction, as indicated by the arrow in each ffigure.
In one embodiment of the invention shown in Figure 4, a generally cylindrical door assembly 2 - 1 opens and closes in sliding motion to expose a food container 4 placed at the bottom platform 3 in the interior chamber of the microwave cooking device. Sections of the generally cylindrical door assembly 2 - 1 made of rigid sheet material traverses the track on the two sides towards the back portion of the microwave cooking device where the slided sections of the door rest.
In another embodiment of the invention shown in Figure 5, a generally cylindrical door assembly 2 -2 opens and closes in folding motion to expose a food container 4 placed at the bottom platform 3 in the interior chamber of the microwave cooking device. Sections of the generally cylindrical door assembly 2 -2 made of flexible sheet material traverses the track on the two sides towards the back portion of the microwave cooking device where the folded sections of the door rest.
In another embodiment of the invention shown in Figure 6, a generally cylindrical door assembly 2 -3 opens and closes in rolling motion to expose a food container 4 placed at the bottom platform 3 in the interior chamber of the microwave cooking device. The generally cylindrical door assembly 2 -3 made of flexible sheet material rolls upward along the track on the two sides towards the back portion of the microwave cooking device where the rolled door rests.
In another embodiment of the invention shown in Figure 7, a generally cylindrical door assembly 2 - 4 opens and closes in rotating motion to expose a food container 4 placed at the bottom platform 3 in the interior chamber of the microwave cooking device. The generally cylindrical door assembly 2 - 4 made of rigid sheet material rotates upward around a horizontal axis on the bottom back portion of the microwave cooking device.
The microwave cooking device may have an electric motor operably connected to the control panel so as to open and close the generally cylindrical door assembly.
It is very important to install microwave energy leakage preventing means between the door assembly and the walls of the microwave cooking device, and it is well known that microwave energy leaking out of a microwave oven presents a health hazard condition to human beings. The two perpendicularly extending generally semi-circular side portions of the microwave cooking device integrally form a capacitor seal plate 5 in order to prevent the leakage of microwave energy. Moreover, the left and right sides of the generally cylindrical door assembly integrally form an inductive quarter-wavelength choke 6 in order to prevent the leakage of microwave energy.
Background Art There are many instances where it would be desirable to be able to easily access a food product inside a food container in the interior chamber of a microwave cooking device while cooking is in progress in order to stir or agitate foods.
A large number of patents disclose microwave ovens for heating and cooking a food product, including those having a turn table.
These prior art arrangements have a flat door to access a food container in the interior chamber of a microwave cooking device from the front. Such configuration does not allow a food product inside the food container to be stirred or agitated during cooking without the food container being removed from the interior chamber of the microwave cooking device. In addition, the water molecules inside the interior chamber does not have an escape route directly above the food container.
Description of the Invention It is a primary object of the invention to provide a microwave cooking device that has a means for accessing a food product inside a food container in the interior chamber of a microwave cooking device without removing the food container from the microwave cooking device.
It is another object of the invention to provide a pans for water molecules to escape from the interior chamber even when the door is closed.
One aspect of the invention provides a microwave cooking device having a generally cylindrical door assembly which either slides, folds, rolls, or rotates to expose the food container in the interior chamber in order to allow the food container to be accessed from the top without obstruction. This configuration allows a food product inside the food container to be stirred or agitated during cooking without the food container being removed from the interior chamber of the microwave cooking device. After the cooking is terminated, the food container can be removed in upwardly vertical direction.
Preferably, the generally cylindrical door assembly comprises a rigid or flexible sheet made of perforated metal with a plurality of holes small enough to make the perforated door opaque to microwave energy.
Another aspect of the invention provides a means for water molecules to escape upwardly from the interior chamber, even when the door is closed, through the holes on the perforated door directly above the food container.
Brief Description of the Figures in the Drawings In drawings which illustrate embodiments of the invention:
Figure 1 marked "Prior Art" is a perspective view of a conventional microwave cooking device with a flat door being closed;
Figure 2 marked "Prior Art" is a perspective view of a conventional microwave cooking device with a flat door being partially open to expose a food container;
Figure 3 is a perspective view of a microwave cooking device according to the invention with a generally cylindrical door being closed;
Figure 4 is a perspective view of one embodiment of a microwave cooking device with a generally cylindrical door being partially open to expose a food container;
Figure 5 is a perspective view of another embodiment of a microwave cooking device with a generally cylindrical door being partially open to expose a food container;
Figure 6 is a perspective view of another embodiment of a microwave cooking device with a generally cylindrical door being partially open to expose a food container; and Figure 7 is a perspective view of another embodiment of a microwave cooking device with a generally cylindrical door being partially open to expose a food container.
Modes for Carrying Out the Invention In a conventional microwave cooking device shown in Figure 1 and Figure 2 both marked "Prior Art", a control panel 1 is located at one side of the front portion of the microwave cooking device.
A flat door assembly 2 is shown closed and partially open, respectively. The flat door assembly 2 opens and closes rotationally around a vertical axis on one front side of the microwave cooking device to expose a food container 4 placed at the bottom platform 3 in the interior chamber of the microwave cooking device. The food container 4 must be removed from the interior chamber in horizontal direction, as indicated by the arrow, so that the food product inside the food container 4 can be stirred or agitated.
According to the present invention shown in Figure 3, a control panel 1 is located at the bottom of the front portion of the microwave cooking device. A generally cylindrical door assembly 2 is shown closed in Figure 3. The food container 4 placed at the bottom platform 3 does not have to be removed from the interior chamber when the food product inside the food container 4 is to be stirred or agitated, as shown in Figure 4, Figure 5, Figure 6, and Figure 7. When cooking is terminated, the food container 4 can be removed from the interior chamber in upwardly vertical direction, as indicated by the arrow in each ffigure.
In one embodiment of the invention shown in Figure 4, a generally cylindrical door assembly 2 - 1 opens and closes in sliding motion to expose a food container 4 placed at the bottom platform 3 in the interior chamber of the microwave cooking device. Sections of the generally cylindrical door assembly 2 - 1 made of rigid sheet material traverses the track on the two sides towards the back portion of the microwave cooking device where the slided sections of the door rest.
In another embodiment of the invention shown in Figure 5, a generally cylindrical door assembly 2 -2 opens and closes in folding motion to expose a food container 4 placed at the bottom platform 3 in the interior chamber of the microwave cooking device. Sections of the generally cylindrical door assembly 2 -2 made of flexible sheet material traverses the track on the two sides towards the back portion of the microwave cooking device where the folded sections of the door rest.
In another embodiment of the invention shown in Figure 6, a generally cylindrical door assembly 2 -3 opens and closes in rolling motion to expose a food container 4 placed at the bottom platform 3 in the interior chamber of the microwave cooking device. The generally cylindrical door assembly 2 -3 made of flexible sheet material rolls upward along the track on the two sides towards the back portion of the microwave cooking device where the rolled door rests.
In another embodiment of the invention shown in Figure 7, a generally cylindrical door assembly 2 - 4 opens and closes in rotating motion to expose a food container 4 placed at the bottom platform 3 in the interior chamber of the microwave cooking device. The generally cylindrical door assembly 2 - 4 made of rigid sheet material rotates upward around a horizontal axis on the bottom back portion of the microwave cooking device.
The microwave cooking device may have an electric motor operably connected to the control panel so as to open and close the generally cylindrical door assembly.
It is very important to install microwave energy leakage preventing means between the door assembly and the walls of the microwave cooking device, and it is well known that microwave energy leaking out of a microwave oven presents a health hazard condition to human beings. The two perpendicularly extending generally semi-circular side portions of the microwave cooking device integrally form a capacitor seal plate 5 in order to prevent the leakage of microwave energy. Moreover, the left and right sides of the generally cylindrical door assembly integrally form an inductive quarter-wavelength choke 6 in order to prevent the leakage of microwave energy.
Claims (6)
1. A microwave cooking device, comprising in combination:
a body with an interior chamber defined by a rectangular bottom portion and two perpendicularly extending generally semi-circular side portions, the side portions integrally forming a capacitor seal plate in order to prevent the leakage of microwave energy;
a generally cylindrical door assembly which retractably opens in order to reveal the interior chamber, the generally cylindrical door assembly having a front side, left and right sides and a back side, the back side of the cylindrical door assembly securely attached to the bottom-back portion of the body, the left and right sides of the generally cylindrical door assembly integrally forming an inductive quarter-wavelength choke between each of the semi-circular side portions of the body and the generally cylindrical door assembly in order to prevent the leakage of microwave energy;
a control panel and associated circuits positioned at the bottom-front portion of the body; and a microwave generator and associated circuits operably connected to the control panel, and positioned inside the bottom portion of the body;
the top portion of the body being free from obstruction when the generally cylindrical door assembly is open.
a body with an interior chamber defined by a rectangular bottom portion and two perpendicularly extending generally semi-circular side portions, the side portions integrally forming a capacitor seal plate in order to prevent the leakage of microwave energy;
a generally cylindrical door assembly which retractably opens in order to reveal the interior chamber, the generally cylindrical door assembly having a front side, left and right sides and a back side, the back side of the cylindrical door assembly securely attached to the bottom-back portion of the body, the left and right sides of the generally cylindrical door assembly integrally forming an inductive quarter-wavelength choke between each of the semi-circular side portions of the body and the generally cylindrical door assembly in order to prevent the leakage of microwave energy;
a control panel and associated circuits positioned at the bottom-front portion of the body; and a microwave generator and associated circuits operably connected to the control panel, and positioned inside the bottom portion of the body;
the top portion of the body being free from obstruction when the generally cylindrical door assembly is open.
2. A microwave cooking device as defined in claim 1, in which the generally cylindrical door assembly comprises a plurality of substantially rectangular perforated sheets made of rigid metallic material slidably attached together, and is opened and closed in sliding movement.
3. A microwave cooking device as defined in claim 1, in which the generally cylindrical door assembly comprises a plurality of substantially rectangular perforated sheets made of rigid metallic material foldably attached together, and is opened and closed in folding movement.
4. A microwave cooking device as defined in claim 1, in which the generally cylindrical door assembly comprises a substantially rectangular perforated sheet made of flexible material coated with metallic material, and is opened and closed in rolling movement.
5. A microwave cooking device as defined in claim 1, in which the generally cylindrical door assembly comprises a perforated sheet made of rigid metallic material, and is opened and closed in rotating movement.
6. A microwave cooking device as defined in claim 2, claim 3, claim 4, or claim 5, in which actuation means for opening and closing the generally cylindrical door assembly is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2253773 CA2253773C (en) | 1998-11-24 | 1998-11-24 | Topless microwave cooking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2253773 CA2253773C (en) | 1998-11-24 | 1998-11-24 | Topless microwave cooking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2253773C true CA2253773C (en) | 2001-01-02 |
Family
ID=4163020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2253773 Expired - Fee Related CA2253773C (en) | 1998-11-24 | 1998-11-24 | Topless microwave cooking device |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2253773C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITPN20100044A1 (en) * | 2010-08-12 | 2012-02-13 | Microglass S R L | CLOSING SYSTEM OF A MICROWAVE CAVITY FOR HEATING FOODS OR PRODUCTS AND / OR VARIOUS TYPES OF MATERIALS |
-
1998
- 1998-11-24 CA CA 2253773 patent/CA2253773C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITPN20100044A1 (en) * | 2010-08-12 | 2012-02-13 | Microglass S R L | CLOSING SYSTEM OF A MICROWAVE CAVITY FOR HEATING FOODS OR PRODUCTS AND / OR VARIOUS TYPES OF MATERIALS |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |