US Patent 11172606 Robotic lawnmower with passive cleaning assembly

A lawnmower which includes a housing, and a passive cleaning assembly for removing detritus from the housing, the passive cleaning assembly being moveably mounted on the housing. The passive cleaning assembly can include a ground-contacting portion, which contacts the ground during use, thereby causing the cleaning portion to move with respect to the housing during movement of the lawnmower. Movement of the lawn mower with respect to the ground causes the cleaning portion of the passive cleaning assembly to move with respect to the housing and to thereby remove detritus from the housing.