US Patent 8032981 Vacuum cleaner

A vacuum cleaner includes a brush assembly that travels along a cleaning surface and draws in dirt-entrained air therethrough, a cleaner body that is connected to the brush assembly and has a dust collector, a fixing unit that detachably mounts the cleaner body onto the brush assembly such that the vacuum cleaner is used as an upright type vacuum cleaner and dismounts the cleaner body from the brush assembly such that the vacuum cleaner is used as a canister type vacuum cleaner, and a regulation unit that restricts a horizontal rotation of the brush assembly if the cleaner body is mounted onto the brush assembly.