Patent ID: 6571424
Filing Date: 2003-06-03
Classification: A47L

Abstract:
A device for removing dust and rubbish from a surface, comprising:a casing provided with a suction opening, a rotating brush, a turbine operationally connected to said brush, a suction nozzle having a predefined flow cross-section, a suction pipe connected to a suction device, said rotating brush having a shaft rotatably supported in a first housing of said casing, said turbine having a shaft rotatably supported in a second housing of said casing, said suction nozzle being located between said rotating brush and said turbine for directing an air flow from said suction opening onto said rotating brush and then onto said turbine, a first bypass duct having a predefined flow cross-section, which first bypass duct connects said suction opening and said suction pipe by bypassing said second housing and said turbine, a first valve which at least partially closes said suction nozzle and at least partially opens said bypass duct.