Abstract: A window assembly is formed of an inside facing vinyl extrusion portion and an outside facing aluminum extrusion portion which are interconnected by resilient snap-fit barb-like connectors integral with each extrusion, thus forming a composite type construction. The metal outside facing portion provides strength, durability and weather resistance; while the vinyl inside facing portion improves thermal insulation characteristics, reduces or eliminates sweating, and enables color, pattern, and other design aesthetics conveniently to be included in the window assembly. The window assembly may be virtually any type, such as the fixed light (window glass) type, sliding type, double hung type, picture type, etc.

Abstract: A pivotable and slidable window assembly includes one or more sashes slidable in parallel, coplanar horizontal tracks. Each sash carries a pair of pivot members extending in opposite directions from the sash to define a pivot axis for swinging the sash out of its usual sliding plane for cleaning or the like of both sides of the sash. Each pivot member is slidably received in a respective one of the tracks, and each includes a foot extending in the plane of sliding movement of the sash and perpendicular to the pivot axis. Each track includes an opening to receive the foot of a respective pivot member when the sash is pivoted for cleaning. Upon pivoting of the sash and movement of the feet into the respective openings, contact between the feet and the openings stabilizes the sash preventing further and unwanted sliding of the sash in the tracks. Thus the sash cannot twist catercorner with respect to the tracks and is prevented from falling out while pivoted.