Building exterior cleaning apparatus

Brushing – scrubbing – and general cleaning – Machines – With air blast or suction

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Details

15103, A47L 104

Patent

active

047979690

ABSTRACT:
The present invention is directed to a self-contained apparatus for cleaning the vertical surface of a building exterior, including washing, rinsing and drying the windows. The apparatus is positioned by an operator above a vertical row of windows and then remotely operated to clean the exterior building surface as the apparatus descends. The apparatus consists of a housing having a washing chamber, a rinsing chamber, and a drying chamber. The washing chamber has a plurality of cleaning fluid spray heads, a sonic agitator for impinging sonic energy onto the cleaning fluid to aid in removing dirt from the windows, air seals for retaining the fluid in the chamber, and a plurality of air wipes for removing the fluid from the building surface. The rinsing chamber has a plurality of rinsing liquid spray heads, a plurality of air seals to contain the rinsing fluid within the chamber and a plurality of air wipes for removing the fluid from the building surface. The washing chamber, rinsing chamber, and drying chamber are provided with openings communicating with a passageway ending in an exhaust outlet. An exhaust blower disposed in the passageway maintains a negative pressure in each of the chambers. A plurality of axially rotatably mounted vanes are disposed in the openings in order to regulate the negative pressure. Pressure sensors in each of the chambers are operatively connected to the vanes to vary the sizes of the openings to regulate the pressure in the chambers, in response to the actual pressures therein.

REFERENCES:
patent: 3425082 (1969-02-01), Hetman
patent: 4112535 (1978-09-01), Wild et al.
patent: 4198724 (1980-04-01), Fisher et al.

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