Patent ID: 6129094
Filing Date: 2000-10-10
Classification: B08B,B24C,E01H,E04G

Abstract:
A method of cleaning aged or dirty buildings and structures made of brick, masonry, stone, block, limestone or other hard, yet porous, building materials so as to remove applied or built-up coatings and paints, mildew, mold, dirt, organic matter, stains, mineral deposits, debris and any other matter, the method comprising the steps of:dispensing high pressure water from a fluid dispensing head within a housing for providing a high pressure fluid flow against a surface to be cleaned;applying a reduced pressure to the housing from a vacuum source to vacuum the water and any coatings, debris, and other matter that is removed from the surface out of the housing;moving the housing along a substantially vertical surface while dispensing and applying a reduced pressure to the housing; andmoving the housing substantially horizontally along the vertical surface.