Patent ID: 8485868

Claim:
A floor treatment apparatus, comprising: a frame ( 1 ); a housing ( 5 ) which is rotatable with respect to the frame about a main axis ( 7 ); at least three head pulleys ( 11 ) which are rotatable with respect to the housing about respective head axes ( 8 ) which are regularly spaced around, and which are parallel to, the main axis ( 7 ); a motor ( 4 ) supported by the frame; a main belt ( 13 ) drivable by the motor ( 4 ) and operationally disposed around a drive pulley ( 14 ) and the at least three head pulleys ( 11 ); a first auxiliary pulley ( 22 ) around which the main belt ( 13 ) is operationally disposed; a second auxiliary pulley ( 25 ) drivable by the first auxiliary pulley ( 22 ); a fixed pulley ( 27 ) connected to the frame ( 1 ); and an auxiliary belt ( 26 ) operationally disposed around the second auxiliary pulley ( 25 ) and the fixed pulley ( 27 ) for rotating the housing ( 5 ) with respect to the frame ( 1 ).