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US 4,621,478 AGranted
Extruded plastic flush stop window mullion and framing system
AssigneeNRG Industries, Inc.
InventorsH. Verne Phillips, Michael A. Walton
Life of this patent
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AssigneeNRG Industries, Inc.
InventorsH. Verne Phillips, Michael A. Walton
Estimating the term…
A simplified plastic window framing system for single or multiple glazing comprising combinations of complementary extrusions wherein the outward appearance of the finished mullions and peripheral framing appears to be that of single extrusions. In outward appearance the glazing is retained within recesses formed in the mullions or frame members and separable retaining members. The combination creates a substantially rectangular external appearance to the individual mullions and framing members. The framing members are roughly L-shaped and the mullions are roughly T-shaped in cross section. The retaining members are substantially rectangular or trapezoidal in cross section. As finished units however, the mullions and framing members are both substantially rectangular in cross section with only the co-extruded glass seals slightly protruding from the mullions or framing members. All screw splines, notches and protrusions are hidden from view by the attached retaining members or, in the case of peripheral framing members, the structure to which the window is attached. The L-shaped framing members can be easily adapted by the attachment of two extra retaining members to form mullions virtually indistinguishable from the T-shaped mullion members. Three different glazing thicknesses can be accommodated by a minimum number of four extrusions. Two of the extrusions are L-shaped framing members, the third and fourth extrusions are rectangular and trapezoidal retaining members. Mullions can be formed by adding additional retaining members to the framing members or fifth and sixth T-shaped mullion members corresponding to the two framing members may be included to minimize assembly time. As an option, an electrically conductive wire can be co-extruded adjacent the screw splines of each plastic extrusion. At the window corners where metal screws are used to join the mullions and framing members together, the metal screws simultaneously perform the function of electrically connecting the wires together to form wire loops about the window panes. The wire loops about the glazing are ideally situated for the attachment of electrical alarm systems or other sensing units. Other possibilities are window defrosting and heating means.
An extruded plastic window framing system comprising at least two differing asymmetric peripheral framing members and at least two separate differing glass retainers attachable to any of said peripheral framing members,
An extruded plastic window framing system comprising at least two differing peripheral framing members and at least two separate differing glass retainers,
An extruded plastic window frame comprising a plurality of extruded plastic framing members surrounding an opening for a window pane, at least one of said framing members including one or more integral screw splines in said member and an electrically conductive means embedded in the member and extending longitudinally adjacent said screw spline.
Dependencies are inferred from the claim text.