Abstract: A method for urging contact between contaminants in an air stream and the wet surfaces of an aqueous-froth, and additional means of limiting the froth to a predetermined volume are provided. A wide spectrum of solution micro-droplet sizes (0.001 to 1000 micron) is introduced into a contaminated air stream. Micro-droplets suspended in the air stream remove contaminants by contact, collide and coalesce in the dynamics of the air stream and are removed by inertia. Smaller micro-droplets remain suspended in the air stream. The smallest micro-droplets evaporate, increasing the solution vapor pressure of the air stream. The humidified or saturated, contaminated air stream continuously expands the surface area of the solution reservoir exponentially into an aqueous froth of tiny bubbles. Airflow velocity drops in the micro-atmosphere inside each bubble of the froth.

Abstract: A bifurcated hose junction is provided for a pole mounted abrading device with vacuum assisted particulate removal. The junction is actuated by the movement of the sanding pad assembly. When a. short side of the rectangular sanding pad assembly is moved toward the tubular handle, the bifurcated hose junction is displaced laterally in relation to the linear axis of the handle. When a long side of the sanding pad assembly is moved toward the tubular handle, the bifurcated hose junction rotates in place, thereby allowing the sanding pad a comprehensive range of motion, in relation to the handle. The range of motion enables the operator to close the angle between sanding pad and the handle, and maintain planar contact between the sanding screen and the work surface, when working in constricted areas.

Abstract: A method and apparatus for filtering an air stream with an aqueous froth are provided. The process includes: passing a contaminated air stream through a diffusing sieve, into an aqueous solution in an expansion chamber; generating, maintaining, and containing an aqueous froth between the liquid-bath reservoir and a saturated fiber element; and continually saturating a coarse-fiber element with liquid from the aqueous solution. The froth is generated and maintained, and the fiber element is saturated, by controlling the dynamic interface between the contaminated air stream and the liquid-bath reservoir. The apparatus for filtering an air stream includes: an air filter device that incorporates a liquid-bath filter initial stage; an aqueous-froth filter second stage; a constantly saturated, coarse-fiber filter as a combined third stage and froth-limiter; and a moist, fine-fiber filter as the final stage.