Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Reexamination Certificate
2001-11-21
2003-05-27
Pelham, Joseph (Department: 3742)
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
C219S397000, C219S398000, C219S411000, C126S200000
Reexamination Certificate
active
06570135
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
One aspect of the invention relates to a kitchen stove for preparing food, another aspect of the invention relates to an oven for preparing food.
2. Background Information
In general terms, a stove for cooking food comprises a stove body, with the stove body being configured with a base and the stove body further being configured with an interior chamber confined by top and bottom walls, side walls, a rear wall, and a front.
An oven is disposed in the interior chamber of the stove body and the oven comprises a heating arrangement configured and disposed to provide heating to cook food in the oven. There is further provided control apparatus to control the heating arrangement.
The oven usually comprises a door in the front wall, which door may comprise a window arrangement, with the window arrangement comprising a viewing area to view the interior of the oven.
U.S. Pat. No. 5,432,321 issued to Gerl on Jul. 11, 1995, discloses an oven which includes a normal heating device, a partial heating capacity device, a first indicator device associated with the normal heating device, a second indicator device associated with the partial heating capacity device, and a control unit.
The control unit turns on a full heating capacity of the normal heating device in a preheating phase and turns on the first indicator device to indicate that the normal heating device is on. The control unit turns on the partial heating capacity device in the preheating phase and turns on the second indicator device to indicate the preheating phase.
The control unit automatically switches over the normal heating device to a reduced heating capacity in a continued heating phase, when a selected command temperature is reached. The control unit turns off the partial heating capacity device and automatically turns off the second indicator device simultaneously with the switchover to the continued heating phase.
U.S. Pat. No. 5,928,540, issued to Antoine et al. on Jul. 27, 1999, refers to an oven door for closing a cooking chamber of an oven, the door being composed of: a frame on the oven; an inner wall and an outer wall both supported by the frame so that the inner wall is located between the cooking chamber and the outer wall, the inner wall and outer wall being positioned relative to one another to delimit an air space; and ventilation elements for establishing a flow of air between the inner wall and the outer wall in order to maintain the outer wall at a low temperature during a cooking operation, wherein the inner wall is made of glass, and the outer wall is removable from the frame and is made of a plastic material selected to withstand the temperatures to which it will be exposed during any cooking operation.
The window arrangement referred to above may comprise a plurality of panes, for example, a first pane and a second pane, with the second pane being disposed adjacent to the first pane, and the first pane being disposed to face towards the interior of the oven upon installation in the stove.
The surface of a continuous clean oven is impregnated with a special porous surface that oxidizes splashes, spatters, etc. of food. Unfortunately, the oven only cleans when the oven is used, and experience teaches owners that their ovens do not stay clean unless they use the oven almost continuously.
The best way to clean a continuous clean oven is to turn it on at 350 or 400 degrees Fahrenheit and leave it on for two or three hours at a time to speed the cleaning process. This results in being similar to a self-cleaning oven. Using a regular oven cleaner can leave residue in the porous surface, and damage the oven lining.
In self-cleaning electric ranges, the oven temperature rises to approximately 875 degrees Fahrenheit (468 degrees Celsius), the temperature needed to burn off food soil.
When the temperature reaches approximately 560 degrees Fahrenheit (293 degrees Celsius), the oven door locks automatically and the lock light comes on. At the end of the cleaning cycle, the oven turns off automatically. When the oven has cooled down to approximately 520 degrees Fahrenheit (271 degrees Celsius), the lock is released, the locked light goes out, and the oven door can be opened.
The invention, in one aspect, relates to a viewing window for baking ovens with self-cleaning pyrolytic arrangements, such window having at least two transparent panes, that is, an inner pane facing the muffle of the baking oven, with this pane being made of temperature-resistant glass or glass ceramic, and an outer pane arranged at a distance from the inner pane.
A viewing window of this type is known from Federal Republic of Germany Patent Publication No. 42 09 622 A1, corresponding to U.S. Pat. No. 5,337,727, issued to Borens, et al. on Aug. 16, 1994, and entitled,“Window for a device with elevated inner chamber temperature.”
Viewing windows for baking ovens typically have at least two panes which are disposed at a distance from one another, that is, an inner pane, which is facing towards the baking oven, and an outer pane, which is subjected to the ambient temperature.
The inner pane is subjected to the temperature and vapors of the baking oven. Thus, it is configured of temperature-resistant, transparent materials, typically glass or glass ceramic, and it is subjected to soiling arising during baking and broiling processes.
Cleaning of the muffle of the baking oven and of the inner pane is to be done manually in a cumbersome manner in standard appliances.
More advanced baking oven appliances, so-called pyrolytic appliances, have an arrangement for self-cleaning which burns off the dirt adhering at the oven interior by way of high temperatures of the interior space of approximately 500 degrees Celsius. The residues which are in the form of ashes can then be wiped away with a cloth.
The self-cleaning mechanism of such pyrolytic appliances is effective on the surface of the muffle, on the one hand, and at the center of the inner pane, on the other hand. Particularly at the edge of the inner pane, in the region of the seal of the muffle, however, a remainder of dirt is often remaining, which dirt is not combusted due to too low temperatures in the peripheral region, but instead is rather consistently burnt-in which hampers a complete cleaning. So as to counteract this effect, the afore-mentioned patent publication of the Federal Republic of Germany provides a heat-reflecting outer coating on the inner pane. This coating, however, can only diminish the heat loss, that is, it can not serve to prevent the remaining dirt residue.
OBJECT OF THE INVENTION
One object of one embodiment of the present invention addresses the problem of configuring the viewing window for baking ovens defined in the introduction in such a way that cleaning of the window is made significantly easier upon use of the baking oven.
SUMMARY OF THE INVENTION
In accordance with one aspect of the invention, this object may be accomplished by a kitchen stove for preparing food, such as, cooking, roasting, boiling, grilling, broiling, and baking food, said stove comprising: a stove body; said stove body being configured with a support to support said stove body; at least one heating arrangement to cook food; said at least one heating arrangement being disposed atop said stove body; said at least one heating arrangement comprising (i.), (ii.), and (iii.): (i.) an arrangement to receive a bottom of a cooking utensil; (ii.) at least one first heating element means to cook food; and (iii.) a first apparatus to select and set a heat setting of said at least one first heating element means; said at least one first heating element means being disposed under said receiving arrangement and being configured to pass heat through said receiving arrangement to a bottom of a cooking utensil; said first heat setting apparatus being configured to select and set a heat setting of said at least one first heating element means at a heat sufficient to cook food; said stove body being configured with a cooking oven; said cooking oven being configu
Gros Oliver
Nass Peter
Nils H. Ljungman & Associates
Pelham Joseph
Schott Glas
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