Static structures (e.g. – buildings) – Window or window sash – sill – mullion – or glazing – Attaching means securing a pane to a sash member or to...
Reexamination Certificate
1999-11-24
2001-08-21
Friedman, Carl D. (Department: 3635)
Static structures (e.g., buildings)
Window or window sash, sill, mullion, or glazing
Attaching means securing a pane to a sash member or to...
C428S430000, C216S034000, C296S093000
Reexamination Certificate
active
06276100
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a bulletproof glass window or laminated safety glass window, in particular for use as a screen of glass at the front of a motor vehicle or windscreen of a motor vehicle or car which is mounted in a frame of the motor vehicle.
BACKGROUND OF THE INVENTION
In DE 195 39 607 A1 such a bulletproof glass window for a motor vehicle is described. The known bulletproof glass window is manufactured as a laminated glass pane made of several glass layers or glass panes, eight in all, with the circumferential edge of one of the glass panes jutting out beyond the other glass panes along the edge of the bulletproof glass window, thus forming a projection. Between the surfaces of the glass panes, which are identical in area, are connecting layers made of polycarbonate film that join the glass panes together. The bulletproof glass window is mounted in a window frame of the car body at the projection, i.e. the protruding section of the glass pane that juts out, the mounting being provided on the glass surfaces of the projection. In the direction of the interior of the motor vehicle, the known bulletproof glass window has a grading or stepped portion from the protruding section to the faces or front surfaces of the following glass panes. Practical tests, however, in particular crash tests, have shown that from the area of the protruding section glass splinters can be projected into the interior of the motor vehicle, creating a potential danger to passengers in the motor vehicle.
SUMMARY OF THE INVENTION
The object of the invention is, therefore, to provide a bulletproof glass window from whose protruding section glass splinters can no longer enter into the interior of the motor vehicle.
This problem is solved by the bulletproof glass window of the present invention. Accordingly, the bulletproof glass window of the invention or safety glass pane, which is mainly constructed to be used as the windscreen of a motor vehicle and which can be mounted into a frame, comprises several laminated glass panes, with at least one of the glass panes jutting out over the other glass panes with a protruding section within a marginal area of the bulletproof glass window, to form a grading or stepped portion from the protruding section to the other glass pane(s) in the direction of the inner side of the bulletproof glass window, e.g. towards the interior of the motor vehicle, the bulletproof glass window with the protruding section of at least one glass pane being mounted on the frame, and the surface in the area of the grading or stepped portion is provided with an edging made of a synthetic material to hold back glass splinters.
In the event of mechanical impact even in the marginal area or in the graded area of the bulletproof glass window, the edging, cover, layer or frame made of synthetic material to hold back glass splinters reliably prevents any glass splinters from penetrating the edging. This means that if the bulletproof glass window according to the invention is used as a windscreen, the glass splinters cannot penetrate through the synthetic material edging and thus enter the interior of the motor vehicle. This also means that passengers in the motor vehicle are protected from glass splinters even if the glass pane breaks or bursts in the marginal area. The present invention consequently has the considerable advantage of reliably protecting the passengers in the vehicle against injury through glass splinters that are projected into the interior.
The edging of the bulletproof glass window according to the invention is preferably fitted with a layer of synthetic material made of polycarbonate (PC) and/or a layer of synthetic material made of polyurethane (PU), polyvinylbutyral (PVB), ethylenevinylacetate (EVA) or polyethyleneterephthalate (PET).
The edging can be formed by a series of layers with several layers of synthetic material as laminates on part of the surface or on the entire surface of the grading and/or on the face of the projection. The laminated structure of the edging means that the connection between the edging and the glass is improved and that the edging is more durable.
The edging is preferably constructed as two layers, the layer that touches the surface of the grading being made of polyurethane which in turn bears a layer of polycarbonate. The polyurethane establishes a secure compound between the surface of the glass of the projecting section and the layer of polycarbonate or the polycarbonate film.
The edging preferably extends on that part of the surface of the grading which is parallel to the inside of the bulletproof glass window to avoid a complicated production and unnecessary production costs for the edging.
The face of the edging or protective layer can extend and thus stick out beyond the at least one projecting glass pane. This is particularly an advantage in cases where the seat in the car body frame is constructed in such a way that spaces remain in the frame where the bulletproof glass window is fitted and that, otherwise, splinters can enter into the interior of the vehicle through the spaces. These spaces can be closed off or blocked by means of the edging jutting out from the edge or the projection of the bulletproof glass window, so that no splinters penetrate into the inside of the motor vehicle in the event of, for example, an accident.
For this, the edging can have a protruding lip, stub or nose that in the area of the grading at least partially fringes the bulletproof glass window. The lip can be manufactured easily when during manufacture of, for instance, a series of even and flat layers of polyurethane and polycarbonate as edging is extended beyond the edge of the pane. The lip can be made to be flexible and/or elastic.
Further advantageous embodiments of the present invention are mentioned in the dependent claims. Further advantages, advantageous embodiments and possibilities of application of the present invention are provided in the following description of preferred embodiments in connection with the drawings wherein:
REFERENCES:
patent: 3155422 (1964-11-01), Campbell et al.
patent: 4228425 (1980-10-01), Cooke
patent: 4817347 (1989-04-01), Hand et al.
patent: 4824722 (1989-04-01), Jarrett
patent: 5456372 (1995-10-01), Solinov et al.
patent: WO97/07377 (1997-02-01), None
Stranner Siegfried
Woll Herwig
Friedman Carl D.
ISOCLIMA GmbH
Lowe Hauptman & Gilman & Berner LLP
Varner Steve
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