DE20009267U1 - Thermal window for vehicle windows - Google Patents

Description

KING · PALLOWS ■ U^f^^^i.^

DÜSSELDORF·ESSEN

PATENT ATTORNEYS

OUR SIGN: 100 165 HS/aj Essen, 24 May 2000

H. W. Nießen Hawthornweg 13

D-41844 Wegberg

Thermal pane for vehicle windows

The invention relates to a thermal pane for vehicle windows comprising an outer pane and an inner transparent and/or translucent, in particular frameless, window pane connected to the outer pane at the edge.
5

In order to achieve a comparatively high rigidity ™ and/or strength for such a thermal pane, it is proposed to connect the edge zones of the inner and outer window panes by means of a plastic casing and at the same time to seal the connecting seam.

Preferably, the opposing edge zones of the inner and outer window panes touch one another flatly, wherein, preferably, the outer and inner window panes form a thermally insulating cavity with one another, pointing away from the edge zone towards the center of the vehicle window.

15

The edge-zone connection and sealing of the outer and inner window panes using a plastic casing provides an increased

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A considerable degree of rigidity of the vehicle window is achieved - even in the case of a frameless design, as is preferred here. This makes it possible, among other things, to create a thermal pane that is flat on the outside and particularly suitable for high driving speeds when using such thermal panes on mobile homes or caravans. Such thermal panes can also be used on other vehicles, such as ships, where high rigidity or strength is important. With such a thermal pane, improved thermal insulation is also achieved and fogging with water vapor on the inside of the vehicle is significantly reduced.

A particularly preferred embodiment is one in which the outer window pane is made of glass and the inner window pane is made of plastic, such as acrylic glass. The edge-side casing according to the invention is surprisingly able to withstand the different expansion behavior of the two different materials for the inner and outer window panes, especially when these two window panes have edge zones that touch each other flatly, i.e. flange-like. In the latter case, a flat bonding of these edge zones is possible as an alternative to the casing.

While a large number of plastics can be considered for the sheathing material, a sheath made of polyurethane is particularly preferred.

In order to be able to open and close a thermal pane for vehicle windows according to the invention, in particular a frameless one, the holding or closing elements of the thermal pane are preferably partially incorporated into the casing, with at least one holding or closing element being firmly connected to the outer window pane, particularly preferably. The bonding of glass panes for vehicle windows with holding or closing elements is known per se and can also be used according to the invention.

The inclusion of the holding or closing element in the edge casing of the thermal pane results in greater strength and improved appearance.

In order to improve reliable sealing of a thermal pane according to the invention with respect to a vehicle-side window frame or to realize an edge zone that only protrudes slightly, the inner window pane preferably has an edge recess for receiving the at least one holding or closing element.

The aforementioned components to be used according to the invention as well as those claimed and described in the embodiments are not subject to any special exceptional conditions in terms of their size, shape, choice of material and technical conception, so that the selection criteria known in the field of application can be applied without restriction.

Further details, features and advantages of the subject matter of the invention emerge from the subclaims and from the following description of the associated drawing, in which - by way of example - a preferred embodiment of the thermal pane according to the invention for vehicle windows is shown. In the drawing:

Fig. 1 a thermal pane in interior view (view A) according to Fig. 2

and 3 - in part -;

Fig. 2 of the thermal disc according to Fig. 1 a section along the Li

never H-Il and

Fig. 3 of the thermal disc according to Fig. 1 a section along the Li

never Ill-Ill.

In the embodiment shown in the figures, a thermal pane 10 consists of an outer window pane 12 made of glass, such as pre-curved green glass with a thickness of e.g. 3 mm, which can also be printed. The outer surface of the thermal pane is essentially flat and completely smooth.

The inner window pane 14, which has essentially the same size and outer contour as the outer window pane 12, consists of clear acrylic glass, which is shaped to form an inner cavity 16 between the two panes. For this purpose, the inner window pane 14 has, at the connection to the edge zone 18, an edge strip 14A which is inclined in relation to the glass pane 12, in particular runs all the way around, and which is followed by a viewing area 14B which is approximately parallel to the glass pane 12.

As can be seen particularly from Fig. 3, a casing 20 made of polyurethane plastic encompasses the edge zones 18 of the inner and outer window panes while simultaneously firmly connecting and sealing them against the cavity 16. The inner and outer edge of this casing 20 is shown as a dashed line in Fig. 1 for the sake of clarity.

As can also be seen from Figs. 1 and 2, a holding or closing element 22, such as the hinge tab of a hinge, is only glued to the outer window pane 12 on the inside of the edge zone 18 in a manner known per se. In addition, the holding or closing element 22 is incorporated into the casing 20 in the area of the edge zone 18. In order to enable the direct flat connection between the holding or closing element 22 and the outer window pane 12, the inner window pane has an edge recess 14C for receiving the holding or closing element 22. As can be seen from Fig. 1, this edge recess 14C can follow the outline of the holding or closing element.

List of reference symbols

10 Thermopane 12 outer window pane 14 inner window pane 14α Edge strips 14&Bgr; Field of view 14C Edge recess 16 cavity 18 Fringe zone 20 Sheathing 22 Holding or locking element A Opinion

Claims (8)

1. Thermal pane for vehicle windows, consisting of an outer window pane ( 12 ) and an inner window pane ( 14 ) connected to the outer window pane at the edges, which is transparent or translucent, characterized in that the edge zones ( 18 ) of the inner and outer window panes ( 12 and 14 ) are connected and sealed by means of a casing ( 20 ) made of plastic. 2. Thermal pane according to claim 2, characterized in that the outer window pane ( 12 ) consists of glass. 3. Thermal pane according to claim 1 or 2, characterized in that the inner window pane ( 14 ) consists of plastic. 4. Thermal pane according to one of claims 1 to 3, characterized in that the casing ( 20 ) consists of polyurethane. 5. Thermal pane according to one of claims 1 to 4, characterized in that at least one holding or closing element ( 22 ) of the thermal pane ( 10 ) is incorporated into the casing ( 20 ). 6. Thermal pane according to one of claims 1 to 5, characterized in that at least one holding or closing element ( 22 ) is firmly connected to the outer window pane ( 12 ). 7. Thermal pane according to one of claims 1 to 6, characterized in that the inner window pane ( 14 ) has an edge recess ( 14 C) for receiving a holding or closing element ( 22 ). 8. Thermal claim according to one of claims 1 to 7, characterized in that the outer and inner window panes ( 12 and 14 ) form a cavity ( 16 ).