Patent ID: 8966709
Filing Date: 2015-03-03
Classification: A47L

Abstract:
1. A cleaner head for a vacuum cleaner comprising: a suction inlet for admitting a first airflow; a turbine inlet for admitting a second airflow; an outlet for discharging the first airflow and the second airflow; a first airflow path for carrying the first airflow from the suction inlet to the outlet; a second airflow path for carrying the second airflow from the turbine inlet to the outlet; an agitator for agitating a surface to be cleaned; a drive assembly for driving the agitator, the drive assembly comprising a turbine that is driven by the second airflow; and a baffle located in the second airflow path and movable between an open position in which the second airflow path is unrestricted and a closed position in which the second airflow path is restricted, wherein the baffle is biased in the open position, the second airflow exerts a lift force on the baffle when in the open position, and the baffle moves to the closed position when the dynamic pressure of the second airflow at the baffle exceeds a threshold.