Patent ID: 7475451

Claim:
A portable surface cleaning apparatus, comprising: a base housing adapted for movement along a surface to be cleaned; an upright handle pivotally mounted to the base housing; a liquid dispensing system comprising: a liquid dispenser associated with the base housing for applying liquid to a surface to be cleaned; and a liquid recovery system comprising: a suction nozzle associated with the base housing and adapted to draw dirty liquid from the surface to be cleaned; a vacuum source including a vacuum motor in the base housing in fluid communication with the suction nozzle to draw dirty liquid from the surface to be cleaned through the suction nozzle to thereby recover the dirty liquid from the surface to be cleaned; a motor cooling air inlet in the base communicating with the vacuum motor for supplying cooling air to the motor; and a motor cooling air outlet in the base for exhausting air heated by the vacuum motor from the base; the improvement comprising: the motor cooling air outlet is positioned at an underside of the base housing in an indented plenum transverse to a forward-reverse axis of the base housing in a central portion of the base housing to direct air heated by the motor onto the surface to be cleaned.