Patent ID: 6934993

Claim:
An extraction surface cleaning apparatus having; a housing with a fluid dispensing system and a fluid recovery system mounted thereto; the fluid dispensing system including: a fluid dispenser for applying fluid to a surface to be cleaned; a fluid supply chamber for holding a supply of cleaning fluid; a fluid supply conduit fluidly connected to the fluid supply chamber and to the fluid dispenser for supplying fluid to the dispenser; the fluid recovery system including: a recovery chamber for holding recovered fluid; a suction nozzle; a working air conduit extending between the recovery chamber and the suction nozzle; and a vacuum source in fluid communication with the recovery chamber for generating a flow of working air from the suction nozzle through the working air conduit and to the recovery chamber to thereby draw dirty fluid from the surface to be cleaned through the suction nozzle and the working air conduit, and into the recovery chamber; an elongated agitation brush mounted to the housing adjacent to the suction nozzle for rotation about a longitudinal axis; and a drive motor mounted in the housing and connected to the agitation brush for rotation of the elongated agitation brush about the longitudinal axis; the improvement which comprises: the elongated agitation brush is mounted to the housing through a pair of arms which are pivotally attached at a first end to the housing and rotatably support the elongated agitation brush at a second end thereof; and a spring connected at one end to the first end of one of the arms and at another end to the housing to bias the elongated agitation brush with respect to the housing into contact with the surface to be cleaned.