Vacuum cleaner with soil agitator and compressed air means

摘要

A vacuum cleaning machine using a floor-mounted vacuum hood forming a travelling vacuum chamber with an optimum combination of suction nozzle intake means, jet stream manifold means and a mechanical soil agitator means in the form of a carpet rake, where the rake is interposed between the suction nozzle intake means and a plurality of jet streams. The jet streams are generally directed toward the tips of the teeth of the carpet rake and from there toward the intake opening of the suction nozzle means to increase the effectiveness of the suction nozzle means. A second modification of the invention shows the carpet rake replaced by a power-driven brush, and the jet stream means is a combined carpet rake and source of a plurality of jet streams directed toward the working area of the brush. An optimum design is where the compressed air that divides into a plurality of jet streams is made to pulsate so as to create a hammering action on the soil.