US Patent 12076732 Air treatment apparatus

A docking station for a vacuum cleaner has a first stage momentum separator which has a plurality of walls comprising an upper wall, a lower wall, and a first sidewall, wherein the first sidewall comprises a first side screen which comprises an air outlet of the momentum separator. A first air flow chamber is located between a first end wall, which is spaced from and faces the first side screen, and the first side screen. A second stage separator, which comprising at least one cyclone, is provided downstream from the first air flow chamber. In operation, air exits the momentum separator through the first side screen and travels through the first air flow chamber to the at least one cyclone.