Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Reexamination Certificate
1999-10-22
2001-05-22
Paik, Sang (Department: 3742)
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
C126S0390BA
Reexamination Certificate
active
06236024
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to the arrangement of a one-piece molded part made of glass ceramic, glass or ceramic as a cooking surface of a cooking unit in a cutout of a sill plate, with an encircling outer peripheral area that is elevated from the level of the inner main plane.
2. Background Information
The flush installation of flat cooking surfaces made of glass ceramic in a cutout of a sill plate may be described in some publications.
In other words, a sill plate may be described as a work space that surrounds a cooking surface and that separates the cooking surface from the remainder of a kitchen counter top.
German Patent Publication No. 30 09 961 C2, for example, describes an installation frame that is connected with a cutout of a sill plate, on which a flat glass ceramic cooktop unit lies on the sill plate, flush with the cutout. By using appropriate screws, it is possible to adjust the height of the cooktop unit, so that, for example, the upper side of the cooktop unit and the upper side of the sill plate can be made to form a plane. The continuous height adjustment by means of screws means that the upper side of the cooking surface can be easily adjusted so that it is flush with the upper side of the sill plate without having to pay too close attention to the exact dimensions. The assembly can also be configured so that the cooking surface projects by a certain amount beyond the work surface or is recessed with respect to it.
Because the cooktop unit is flat, the adhesive connections that are provided to create the seal between the sill plate and the cooktop unit are exposed without protection to overflows of the food being cooked. The adhesive connections and the sealing areas, which are particularly sensitive, are also extremely difficult to clean. Some publications may describe the use of dark adhesive or sealing compounds, which are less likely to show the dirt.
Moreover, hot pots and pens can be unintentionally moved out of the actual cooking area onto the part of the cooktop unit where, in some embodiments, there are control and/or display elements, as a result of which said control and/or display elements can be damaged.
With a totally flat construction, it is also possible for the hot pots and pans to be unintentionally moved out of the actual cooking areas onto the work surface, which can damage the cooking surface, or even worse, because of the absence of any resistance provided by an edge, the hot pots and pans, plus their contents, can be unintentionally moved out of the working surface with unforeseeable consequences.
Some publications may also describe one-piece glass ceramic cooking surfaces, the outer peripheral area of which is either elevated or recessed on one side with respect to the main plane. German Patent Publication No. 196 10 073 A1 describes a glass ceramic cooking surface, which has at least one step, whereby the step is realized in the form of a sharp edge, which can be easily damaged by pots and pans or by cleaning devices such as the scrapers that are conventionally used to clean glass ceramic cooking surfaces.
A plate made of a material that is heat-permeable, such as glass ceramic, glass, ceramic or a similar material, and can be used as a surface for cooking, for example, is described in German Patent Publication No. 297 02 586 U1. The one-piece plate thereby forms two parallel planes at different heights.
A cooking and control surface made of a one-piece glass ceramic plate, in which the control surface is elevated and the cooking surface is located opposite it, is described in German Patent Publication No. 42 16 677 A1.
German Patent Publication No. 90 13 064 U1 describes a one-piece cooking area, with a working area made of ceramic material or glass ceramic, whereby the cooking area is provided with an elevated, essentially encircling edge.
A one-piece molded part made of glass, glass ceramic or ceramic as a heated surface is described in German Utility Model German Patent Publication No. 298 11 628.6, whereby the molded part forms at least the surface and one lateral surface that is bent downward.
German Patent Publication No. 43 33 334 A1 describes a plate that is made of glass ceramic as a component of a cooking unit, in which at least one area of the one-piece plate is on a plane that is different from the main plane.
FIG. 7
in German Patent Publication No. 43 33 334 A1 shows a one-piece glass ceramic plate with an encircling outer peripheral area that is elevated with respect to the level of the inner main plane of the plate, in which the cooking zones are located. The radius diameters between the main plane and that of the elevated peripheral area claimed are from 4 mm to 100 mm.
OBJECT OF THE INVENTION
The object of the invention is to find an arrangement of a one-piece molded part made of glass ceramic, glass or ceramic, with an encircling outer peripheral area that is elevated with respect to the main plane, in a cutout of a sill plate which substantially eliminates the disadvantages and weaknesses of the constructions and embodiments of other cooktops or stoves, and is also substantially simple and economical to manufacture, as well as substantially simple and economical to install. An additional object of the invention is to find an arrangement that is substantially very easy to operate and clean, to inspect and maintain, and offers a substantially high degree of safety.
SUMMARY OF THE INVENTION
The present invention teaches the arrangement of a one-piece molded part made of glass ceramic, glass or ceramic as the cooking surface of a cooking unit in a cutout of a sill plate, with an elevated, encircling outer peripheral region that is on a level that is different from the level of the inner main level of the one-piece molded part, in which at least one cooking zone is located, whereby the one-piece molded part is inserted flush into the cutout of the sill plate, or, as disclosed, the arrangement of a one-piece molded part as described above, in which the one-piece molded part is laid by means of its encircling peripheral area on the periphery of the cutout of the sill plate.
In other words, “flush” may mean that the one-piece molded part is inserted into the cutout of the sill plate so that the encircling peripheral area of the one-piece molded part is level with the cutout of the sill plate and substantially no gap exists between the cutout of the sill plate and the one-piece molded part. Alternatively, “on the periphery of the cutout of the sill plate” may mean that the one-piece molded part is inserted into the cutout of the sill plate so that the encircling peripheral area of the one-piece molded part lies above the cutout of the sill plate, forming possibly an F-cut (in other words, a bevel cut) at both the front elevated peripheral area and the rear elevated peripheral area or possibly a C-cut (in other words, a rounded cut) at both the front elevated peripheral area and the rear elevated peripheral area.
As a result of this arrangement claimed by the invention and the use of the one-piece molded part, it becomes possible to substantially eliminate the use of the installation or protective frame that surrounds the molded part.
In other words, the raised encircling peripheral area may function as a barrier to substantially prevent hot cookware from being unintentionally moved from the inner main plane of the one-piece molded part, which is placed lower than the encircling peripheral area, over the control and/or display zone, which is placed on the encircling peripheral area and therefore at a higher level than the inner main plane of the one-piece molded part on which cookware may be located. Alternatively, the raised encircling peripheral area may function as a barrier to substantially prevent food being cooked from overflowing from the inner main plane of the one-piece molded part, where at least one cooking zone is located and which is placed lower than the encircling peripheral area, over the control and/or display zone, which is placed on the encircli
Bader Hubertus-Christian
Gotz Helga
Hubert Stefan
Juras Karl-Heinz
Nils H. Ljungman & Associates
Paik Sang
Schott Glas
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