Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Reexamination Certificate
2002-10-04
2004-02-17
Walberg, Teresa (Department: 3742)
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
C219S396000, C219S522000, C126S190000, C126S200000
Reexamination Certificate
active
06693261
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an electric stove to cook food, and the like.
2. Background Information
In general terms, an electric stove can be used to cook food.
An electric stove typically comprises an electric stove body having an exterior comprising side walls, a top and a bottom spaced from said top. The top has a an exterior top surface on which typically are disposed a plurality of electric heating elements. The electric heating elements of the top surface can be controlled by control apparatus to provide heat sufficient to cook food in cooking utensils, such cooking utensils being placed with their bottom on a corresponding electric heating element. The electric heating elements and their corresponding control apparatus are connected by electric circuitry such that the heat produced by the electric heating elements can be set at a desired temperature for cooking food.
An electric stove also typically comprises electric heating arrangements in the stove. These electric heating arrangements are also connected by electric circuitry to control apparatus so as to permit selection of a cooking temperature in a stove.
Cooking utensils can typically be supported in an electric stove by way of an arrangement to support a cooking utensil in the electric stove.
Accordingly, an electric stove is an appliance that can be used to cook food at a desired temperature by heat such as heat generated by electrical energy transmitted from a source of electric energy to heating elements and the heat for cooking can be controlled by corresponding control apparatus.
Further, most stoves have a stove body having an exterior comprising side walls, a top and a bottom spaced from said top. The top has a an exterior top surface on which typically are disposed a plurality of heating elements. The heating elements of the top surface can be controlled by control apparatus to provide heat sufficient to cook food in cooking utensils, such cooking utensils being placed with their bottom on a corresponding heating element. The heating elements and their corresponding control apparatus are connected such that the heat produced by the heating elements can be set at a desired temperature for cooking food.
A stove also typically comprises heating arrangements in the stove. These heating arrangements are also connected to control apparatus so as to permit selection of a cooking temperature in a stove.
Cooking utensils can typically be supported in a stove by way of an arrangement to support a cooking utensil in the stove.
Thus, a stove is an appliance that can be used to cook food at a desired temperature by heat such as heat generated by energy transmitted from a source of energy to heating elements and the heat for cooking can be controlled by corresponding control apparatus.
It is also important for an electric stove to permit viewing of the food that is cooked with an electric stove in a manner that represents the true color of the food that is prepared with an electric stove.
Therefore, conventional stoves and ovens typically have a viewing arrangement that allows the user to see the food in the interior of the unit and to determine the degree of doneness of the food. A viewing arrangement typically has a multilayer glass module with an inside pane and a front pane, which module may distort and create situations where heat escapes from the appliance.
Typically very high temperatures occur within a baking oven muffle during operation thereof, particularly in the case of a baking oven with a pyrolytic or self-cleaning feature. The temperatures at the central region of the viewing arrangement are substantially greater than at the outer or peripheral region. There is accordingly created a large temperature gradient at the inner pane, from the central region to the peripheral region. This temperature gradient may cause a bulge-like deformation of the inner pane such that the inner pane, in the case of rotary doors, or swing doors or pivot doors, may be pressed away from the muffle or the associated muffle seal in the lower muffle region. This leads to a gap at the door through which heat can escape from the oven muffle.
Several design measures are known to deal with this problem.
German Patent Publication No. DE 198 49 989 A1 published on May 4, 2000, discloses a baking oven door in which the inner pane is shaped like a bowl. The distance of the pane away from the plane that is disposed or clamped at the flange of the muffle is greater in the central region than at the peripheral region of the plane. This yields a compensation of the operationally induced deformation. German Patent Publication No. DE 198 49 989 A1 published on May 4, 2000 and its corresponding European Patent Application No. EP 99 76 892, are hereby incorporated by reference as if set forth in their entirety herein.
Such a defined, bowl-shaped and bulged inner pane can only be manufactured with great effort, particularly since the bulge is in the range of millimeters (five to fifteen millimeters per ten millimeters).
OBJECTS OF THE INVENTION
It is one object of the present invention to provide an electric stove and components thereof.
It is also an object of the present invention to provide a stove with a window arrangement.
It is further an object of the present invention to provide an electric stove door window inner pane which can be formed with minimized effort for the baking oven door described in the foregoing which door is configured to close the feed opening of the oven muffle of a baking oven and which door comprises a door frame, which frame is configured to mount at least two glass and/or glass-ceramic panes, the panes being disposed in spaced-apart relationship along one another and the panes comprising an at least partially transparent front pane and a shaped inner pane which is positioned to face towards the feed opening.
It is also an object of the present invention to provide an oven with a window arrangement.
It is yet a further object of the present invention to provide a stove door window with a shaped inner window pane.
It is still further an object of the present invention to provide a stove door window inner pane which can be formed with minimized effort for the baking oven door described in the foregoing which door is configured to close the feed opening of the oven muffle of a baking oven and which door comprises a door frame, which frame is configured to mount at least two glass and/or glass-ceramic panes, the panes being disposed in spaced-apart relationship along one another and the panes comprising an at least partially transparent front pane and a shaped inner pane which is positioned to face towards the feed opening.
SUMMARY OF THE INVENTION
The invention teaches in one aspect an electric stove to cook food, said electric stove comprising: an electric stove body; said electric stove body being configured with an exterior comprising side walls, a top, and a bottom spaced from said top; said top comprising an exterior top surface; a plurality of electric heating elements disposed on said exterior top surface; said plurality of electric heating elements each being configured to receive the bottom of a cooking utensil to cook food on said electric stove; electric heating element control apparatus to control the operation of said electric heating elements to produce a temperature to cook food on said electric stove; electric circuitry configured to connect said heating element control apparatus and said plurality of electric heating elements to a source of electric power; a first electric heating arrangement disposed in said electric stove and being configured to heat said electric stove to a cooking temperature; a first electric heating arrangement control apparatus being configured to control the operation of said first electric heating arrangement to produce a cooking temperature to cook food in said electric stove; an arrangement to support a cooking utensil in said electric stove; a second electric heating arrangement disposed in said electric stove and being co
Dahbour Fadi H.
Nils H. Ljungman & Associates
Schott Glas
Walberg Teresa
LandOfFree
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