Power sliding window for truck cab

A power window assembly for a rear window opening of a truck cab, the rear window opening having an inboard channel and an outboard channel, the power window assembly comprising:

• a pair of stationary window panes spaced apart and securely mounted in the outboard channel of the rear window opening and defining therebetween a center window opening;
• a raceway formed along the rear window opening inboard of the inboard channel;
• first and second movable window panes slidably located in the inboard channel of the rear window opening and adapted for sliding movement toward each other to a closed position where the panes abut each other closing the center window opening and away from each other to an opened position overlying at least a portion of the stationary window panes thereby opening the center window opening;
• a reversible electric motor having a single drive means connected to a primary drive gear for generating rotary motion of the primary drive gear;
• a tape having a plurality of slots engaging and driven by the primary drive gear so that the tape moves in a translational push-pull movement upon rotation of the primary drive gear by the motor;
• a track extending between the primary drive gear and the first movable window pane for guiding the tape;
• an arm of the first movable window pane projecting downward and inboard into the raceway and the arm having a plurality of teeth depending into the track and engaging the slots in the tape for driving the first movable window pane so that the translational push-pull movement of the tape moves the first movable window pane between the closed position and the opened position;
• an arm of the second movable window pane projecting downward and inboard into the raceway and the arm having a rack received in the raceway;
• and
• a secondary drive gear rotatably mounted and engaging the tape and the rack of the second movable window pane so that the tape drives the secondary drive gear and the secondary drive gear drives the second movable window pane whereby the movable window panes move simultaneously toward each other to the closed position and away from each other to the opened position.