Patent ID: 6018845
Filing Date: 2000-02-01
Classification: A47L

Abstract:
A vacuum cleaner comprising:a dust chamber;a suction member including a housing;a rotary brush located within said housing;a hose located in said housing adjacent one end of said rotary brush for coupling said suction member to the dust chamber; andan air flow adjusting valve provided in a wall of said housing adjacent the other end of said rotary brush for allowing air to flow into said housing from outside of said housing,wherein when a lower surface of the suction member is brought into tight contact with a floor surface by suction pressure and negative pressure in said suction member increases, a degree of tight contact between the lower surface of said suction member and said floor surface is adjusted by air introduced through said air flow adjusting valve into said suction member, said air flowing across said rotary brush and into said hose to assist in the removal of dust particles from said rotary brush.