Abstract: The invention disclosed relates to the remote cleaning of outer surfaces of windows or facades of high rise buildings without the need for workers located outside the building wall. In fact, the cleaning operation effectively duplicates the conventional manual cleaning operation, such that a minimum of cleaning liquid is used, and no means is required for removal of excess cleaning liquid. The apparatus comprises a rectangular master frame and a parallelogram sub-frame contained therein, suspended from the top of the building to a position opposite a window to be cleaned. A novel cleaning tool, including mechanical scrubbing means e.g. a brush and mechanical scraping means e.g. squeegee and a washing liquid spray means, is carried on an insertion tool attached to the parallelogram sub-frame, and brought to bear against the window outer surface to be cleaned, as required.

Abstract: The invention disclosed relates to the remote cleaning of outer surfaces of windows or facades of high rise buildings without the need for workers located outside the building wall. In fact, the cleaning operation effectively duplicates the conventional manual cleaning operation, such that a minimum of cleaning liquid is used, and no means is required for removal of excess cleaning liquid. The apparatus comprises a rectangular master frame and a parallelogram sub-frame contained therein, suspended from the top of the building to a position opposite a window to be cleaned. A novel cleaning tool, including mechanical scrubbing means e.g a brush and mechanical scraping means e.g. squeegee and a washing liquid spray means, is carried on an insertion tool attached to the parallelogram sub-frame, and brought to bear against the window outer surface to be cleaned, as required.

Abstract: A window glaze cleaning device comprises an outer frame and an inner frame which have magnets attached so that when they are placed face-to-face on opposite glazings of a window, the outer frame can be moved, by movement of the inner frame, over the outer glazing. The frames have bearings, e.g. air bearings to reduce friction, and the outer frame, which is counter-weighted, has nozzles for spraying cleaning liquid on to the outer glazing, a scrubber which may be positioned for cleaning the outer glazing, and a wiper blade which may be positioned for removing the cleaning liquid therefrom as is done in conventional window cleaning. The outer frame is counter weighted by pulleys on rocker arms which move the outer frame away from the window when it is to be repositioned.