Patent ID: 8479357

Claim:
Moquette carpet cleaning machine ( 10 ) operable in pull-back mode comprising: a machine body ( 11 ) having a front and a rear wherein said rear is provided with main rear wheels ( 12 ) and a suction mouth ( 14 ) placed at the front, and support means ( 19 ) connected to said machine ( 10 ), wherein said support means ( 19 ) support at least one auxiliary wheel ( 16 ) movable with respect to said machine body ( 11 ) towards the rear of said machine body ( 11 ) to lower said machine body ( 11 ) into at least a first position (A) and movable towards the front of said machine body ( 11 ) to raise said machine into at least a second position (B) such that, when said machine body ( 11 ) is in said first position (A), said suction mouth ( 14 ) is maintained in contact with the ground ( 20 ), and when said machine body ( 11 ) is in said second position (B), said suction mouth ( 14 ) is maintained substantially raised from said ground ( 20 ) wherein constraining means ( 21 ) that comprise a spring act on said support means ( 19 ) or said at least one auxiliary wheel ( 16 ) to bring and stably maintain said machine body ( 11 ) said second position (B), said constraining means being activated by raising said machine body ( 11 ) by rotating the machine ( 10 ) so that said machine ( 10 ) pivots on the rear wheels ( 12 ) wherein said at least one auxiliary wheel ( 16 ) is moved by control means ( 22 ) that are adapted to oppose the action of said constraining means ( 21 ) in order to lower said machine body ( 11 ) into said first position (A), wherein said control means ( 22 ) are a brake wire connected to said at least one auxiliary wheel ( 16 ) or said support means ( 19 ).