US Patent 11857137 Surface cleaning apparatus

A canister surface cleaning apparatus comprising a canister body having a recess. The recess comprises a wall and sidewalls that extend away from the wall to define a volume. An air treatment assembly is removably mountable to the canister body. When the air treatment assembly is mounted to the canister body and the canister body is positioned with on the floor, the wall extends generally vertically and one of the sides of the air treatment assembly faces the wall and is positioned in the recess.