Patent ID: 7241210

Claim:
Floor treating machine, comprising a frame ( 20 ) provided with a housing ( 11 ) which is supported with respect to the frame ( 20 ) in such a manner that it can rotate about a substantially vertical housing axis, at least three heads ( 14 ) positioned at intervals around said axis and rotatably mounted to the housing ( 11 ), the axis of each head ( 11 ) being about parallel to the housing axis, and each head ( 11 ) having a bottom surface provided with treating means and/or coupling means for treating means to be coupled to, and a motor ( 1 ) on the frame ( 20 ) which is in driving interaction with the housing ( 11 ) and the heads ( 14 ) by means of respective transmissions ( 12 , 13 , 24 ; 6 , 9 , 10 , 21 , 28 , 29 ), at least two of the heads ( 14 ) being drivable by means of separate respective head transmissions each comprising a head pulley ( 12 ) connected to the respective head ( 14 ), a drive pulley ( 13 ) interacting with the motor ( 1 ) as well as a belt ( 9 ) between each pair of a head pulley ( 12 ) and a drive pulley ( 13 ), wherein the transmission between the motor ( 1 ) and the housing ( 11 ) comprises at least one auxiliary drive belt ( 6 ), a frame pulley ( 21 ) connected to the frame ( 20 ), the first auxiliary belt ( 6 ) being applied around said frame pulley ( 20 ) and a first auxiliary pulley ( 29 ) which is rotatably supported with respect to the housing (II) for rotating the housing ( 11 ) with respect to the frame ( 20 ), and a second auxiliary pulley ( 10 ) coaxially connected to the first auxiliary pulley ( 29 ), a drive shaft pulley ( 28 ) connected to the drive shaft ( 25 ), and a second auxiliary belt ( 9 ) applied around said second auxiliary pulley ( 10 ) and the drive shaft pulley ( 29 ).