Metal sliding window

Claim 1

A metal sliding window having a pair of relatively movable sashes positioned in a common plane when in a closed position and in parallel planes when in an opened position, comprising: a window frame comprising a pair of elongated identical opposed guide profile members joined at their ends to a pair of elongated identical opposed centering profile members to define a rigid rectangular frame, each of said guide profile members having inwardly opening, front and rear, parallel grooves and a pair of transverse connecting grooves extending between said front and rear grooves, said connecting grooves being spaced apart in the lengthwise direction of said guide profile members, said guide profile members also having coplanar stop flanges projecting inwardly toward each other forwardly of said front grooves, said centering profile members having front and rear, coplanar, transversely spaced centering flanges projecting inwardly toward each other, the outer centering flanges being coplanar with said stop flanges; each of said sashes comprising four elongated, substantially identical, profiled parts joined at their ends to form a rectangular sash disposed within said frame, said sash parts each having front and rear, parallel, inwardly projecting, transversely thick flanges joined by an integral outer base part thereby to define a U-shaped cross section, the transverse depth of said sash part being several times the dimension thereof paralleL to the plane of the window, the flanges of said sash part being of a transverse dimension substantially equal to their dimension parallel to the plane of the window, said sash parts mating so that their flanges define a recess for receiving a closure panel, each of said sash parts also having at least one rib extending outwardly from said base part, said ribs being positioned rearwardly of and in overlapping relationship with said stop flanges and said front centering flanges and being adapted for sealing contact therewith, the pair of sash parts adjacent the centering profile members being received between said centering flanges thereof; a pair of longitudinally spaced fasteners secured to and extending through the rearward flanges of the pair of opposing sash parts of each sash adjacent said guide profile members, said fasteners on one sash being spaced apart the same distance as the connecting grooves where they connect to the front groove, said fasteners extending outwardly from said base part; rollers rotatably mounted on said fasteners and received in said grooves, the rollers on said one sash being movable through said connecting grooves between said front and rear grooves whereby to permit relative movement of said sashes between said closed position and said open position.