US Patent 7219470 Sliding window assembly and a track member for same

A sliding window assembly for a vehicle includes an upper track member, a lower track member, and a sliding unit. The track members each define a first channel having a first depth, a second channel having a second depth, and a third channel having a third depth less than the first and second depths. The sliding unit includes upper and lower edges. Each edge has a first tab and a second tab extending from the edge. The sliding unit slides in the track members to move between an open and a closed position. The first tabs slide in the first channels, the second tabs slide in the second channels, and the edges slide in the third channels.