Cleaning and liquid contact with solids – Processes – Including use of vacuum – suction – or inert atmosphere
Patent
1974-09-30
1976-05-25
Kellogg, Arthur O.
Cleaning and liquid contact with solids
Processes
Including use of vacuum, suction, or inert atmosphere
134 10, 134104, 134154, 15320, 15353, B08B 504
Patent
active
039590100
ABSTRACT:
There is disclosed a mobile cleaning unit which utilizes air vortexes to scour the surface of streets, pavement and the like and to remove finely subdivided debris therefrom. The vortexes are generated by a vacuum which is applied through a cleaning head bearing apertures of limited cross sectional area to provide a minimal air flow therethrough of at least about 200 cubic feet per minute per square inch of aperture area. The vacuum is at least about three, preferably at least five inches mercury beneath atmospheric pressure resulting in the development of a well defined air vortex at the inlet to each of the apertures of the cleaning head. The cleaning head is supported and moved across the surface to be cleaned at an elevation sufficient to place the base of the vortex on the work surface. In the preferred embodiment, the cleaning head also includes a plurality of water spray nozzles which are directed to impinge a water spray onto the work surface adjacent the vortex, thereby washing the surface and lifting all adsorbed or occluded debris therefrom. The invention also includes vacuum support facilities including an air separator which operates under "wet" conditions wherein the debris is centrifically separated from the air stream in the presence of water droplets which are coalesced by the centrifugal action and assist in washing the debris from the air stream.
REFERENCES:
patent: 2458258 (1949-01-01), Furr
patent: 3079285 (1963-02-01), Rockwell
patent: 3447188 (1969-06-01), Maasberg
Headrick Edward E.
Thompson David L.
Kellogg Arthur O.
Thompson Tank Manufacturing Company
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