Movable or removable closures – Processes
Reexamination Certificate
2000-07-31
2001-10-09
Redman, Jerry (Department: 3634)
Movable or removable closures
Processes
Reexamination Certificate
active
06298606
ABSTRACT:
This invention relates generally to flush-mounted window assemblies for vehicles and more particularly, to flush-mounted vehicular window assemblies which articulate about a hinge attached to one side of the window in a manner to achieve long-term reliability.
BACKGROUND OF THE INVENTION
In an effort to make automobiles more fuel-efficient, automobile exterior designs are becoming more streamlined. To achieve this goal, automobile manufacturers are requiring flush-mounted panel and window assemblies. The goal is to locate the panel or window within the vehicle such that the peripheral edge of the panel or window assembly is recessed and the outer surface of the panel is generally flush with any adjoining body panels. In the case of fixed panels, a conventional technique includes placing or running a bead of adhesive material around the entire inside peripheral edge of the panel and bonding it in the vehicle opening. While satisfactory for stationary windows, this method creates problems with movable windows, however, particularly those which articulate about a hinge.
Conventional articulated or hinged windows are fixed to the vehicle by a mounting assembly which is fastened by a stud passing through a hole drilled in the panel. A low profile nut is then threaded onto the stud extending through the panel to retain the panel thereon. A major disadvantage is that a significant number of glass panels are broken as a result of drilling the holes through the panel. The panels are also broken during or after mounting of the mounting hardware. To avoid the breakage of the glass panel, sophisticated techniques have been adopted to drill the holes, and the mounting hardware has been adapted to reduce breakage. As a result, the price of such panel assemblies is unnecessarily high. Moreover, the resulting panel is not truly flush since the mounting hardware has a positive relief with respect to the panel exterior surface.
Another attempt to reduce the exterior profile of articulated window assemblies is disclosed in U.S. Pat. No. 4,396,221 which employs a channel extending around the edge of the window pane, a flexible resilient portion allowing pivotal movement of the window pane, and one of several types of fasteners. Such fasteners include a clip with a detent received in the seal and securing the hinge and thus the assembly to a pinch weld flange.
Another embodiment of the hinged window assembly just described includes a substantially rectilinear hinge member which includes a retaining end bonded to the exterior or front surface of the window panel by an adhesive and an opposing retaining end having an aperture which receives a metal screw extending into the vehicle body. Seated on the pinch-weld flange is a sealing weather strip which forms a closed bulbous portion engaging both the inside surface of the pane as well as a shoulder of the recess leading to the pinch weld flange on the exterior sheet metal body portion. To conceal the fastener for the hinge, a metal covering extending from the vehicle roof or another portion of the vehicle may extend over the fastener and a substantial portion of the hinge.
A disadvantage associated with each of the above hinged windows is that the hinge member is fixed to the exterior surface of the panel. In addition, in the last embodiment described above, the fastener securing the assembly to the vehicle is exposed, or must include a special cover member. Accordingly, the exterior profile of these window assemblies do not result in a truly flush-mounted, articulated window assembly.
Although known in the art to adhesively bond metal to glass for a variety of purposes such as stud attachments, small hinge plates, etc., known hinge adhesives and hinge designs are inadequate to meet load requirements and long-term environmental resilience required for flush-mounted, hinged window assemblies. Hinge mounting of large size, flush-mounted panels in the nature of van windows is a demanding application of adhesive technology. The higher weight of such a window transmits more severe vibration requiring greater strength and greater long-term environmental resilience and durability than is available with such prior known bonds. Styling and design limitations restrict the number of hinges and the size of the bond areas.
Accordingly, there is now a need for large panels such as van or tailgate windows having a flush mounted hinge, and an improved bond between a hinge member and the single panel surface to which it is attached to support the panel.
SUMMARY OF THE INVENTION
The present invention includes a unique articulated window assembly especially for vehicles, and a method for manufacturing the panel assembly.
The panel assembly of this invention is especially useful as a flush-mounted vehicle window assembly, and includes, in combination, a panel having inner and outer surfaces which terminate in a peripheral edge and give the panel a predetermined geometric shape. At least one mounting member is secured to the inner surface of the panel and spaced from the peripheral edge. An adhesive is used to bond a flange of the mounting member to the inner surface of the panel. The resulting bond between the mounting member flange and the panel is sufficiently strong such that when a load sufficient to induce failure is imposed between the mounting member and the panel, failure of the panel assembly results other than in the adhesion of the adhesive to the mounting member or panel. More specifically, failure may occur as cohesive failure of the adhesive, mechanical failure of the mounting member adjacent the adhesive, or mechanical failure of the panel adjacent the adhesive. The bond is preferably strong enough to withstand a failure load of at least 150 pounds.
One embodiment of the invention includes an articulated window assembly for use in a vehicle wherein the window assembly is mounted in the window opening from the inner surface with the opposite surface generally flush with the exterior surface of the vehicle. The articulated window assembly includes, in combination, a transparent sheet having inner and outer surfaces terminating in a peripheral edge and defining a shape to fit within the window opening. At least one window-mounting member is bonded to the inner surface of the sheet at a position spaced inwardly from the peripheral edge and fixing the sheet in the window opening. The mounting member may include a plurality of projections extending therefrom for spacing the mounting member from the inner surface of the sheet by a predetermined distance. One or more adhesives are provided between the inner surface of the sheet and the mounting member for bonding the sheet and mounting member together in such a manner that when tested under a straight pull test of more than 150 pounds applied at a rate greater than 25 millimeters per minute, failure will occur generally in the sheet, the mounting member or the cohesiveness of the adhesive will fail, but the adhesion of the adhesive to the sheet or mounting member will not fail. Such strength is also maintained after soaking in 80° C. water for at least 100 hours.
Another embodiment of the invention includes a hinged window panel having a shape to fit within the window opening of a vehicle with an outer surface of the peripheral edge aligned generally flush with an outer surface of the window opening. At least one hinge assembly includes a flange portion which is located on the inner surface of the panel inwardly from the peripheral edge and a hinged portion for engaging the window opening. At least one latch-mounting member is provided having a base portion located on the inner surface of the panel inwardly from the peripheral edge and spaced from the hinge assembly. The latch-mounting member also includes an end portion to receive a latch interconnected to the inside of the window opening. A first adhesive is optionally provided having a quick set-up time, for temporarily fixturing the hinge assembly and the latch-mounting member to the inner surface of the panel. A second adhesive is then provided for permanent
Repp R. Scott
Stallman Pamela M.
Donnelly Corporation
Redman Jerry
Van Dyke Gardner, Linn & Burkhart, LLP
LandOfFree
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