FINE VACUUM CLEANER Russian patent published in 1997 - IPC

FIELD: household equipment. SUBSTANCE: vacuum cleaner has housing with dust-laden air inlet branch pipe and cleaned air outlet branch pipe, which are connected with associated flexible hoses, air suction unit, filter with dust collector and flare. Cleaned air outlet branch pipe is disposed in central part of dust-laden inlet branch pipe. Cleaned air outlet branch pipe for feeding cleaned air to surface to be treated is communicated with diffuser, fine filter and converging tube, which are positioned in series within flare in axial alignment with it in the direction of air flow. EFFECT: increased efficiency, convenient usage, enhanced reliability in operation and improved quality of cleaning. 1 dwg