Apparatus for treating by injecting a fluid treatment material into porous structures such as those formed from masonry, concrete, brick, stone, marble, and wood including those structures with reinforcement members or other members embedded therein, comprising:
- applicator head means for engaging at least a surface section of a porous structure to be treated;
- said head means defining at least one first chamber having an outer peripheral border engageable with a surface portion of a porous structure to be treated, and at least one second chamber surrounding said first chamber and having a peripheral border engageable with a surface portion of a porous structure to be treated;
- vacuum producing means communicating with at least said second chamber for drawing a vacuum in said second chamber when said applicator head means is in engagement with a porous structure to be treated to positively secure said applicator head means to the structure;
- first sealing means communicating with the peripheral border of said first chamber for effecting a seal between said first chamber and a porous structure to be treated and between said first chamber and said second chamber when said applicator head means engages a porous structure to be treated;
- second sealing means communicating with the peripheral border of said second chamber for effecting a seal between said second chamber and a porous structure to be treated;
- fluid treatment material means communicating with said first chamber for selectively applying pressurized fluid treatment material to a porous structure to be treated;
- said fluid treatment material means including at least one supply reservoir;
- control means for selectively controlling the functioning of said vacuum producing means and said fluid treatment material means;
- pressure supply means for selectively increasing the pressure of the fluid treatment material;
- and
- said applicator means, said first and second sealing means, said fluid treatment material means, said pressure supply means and said control means being constructed and arranged such that when said applicator head means engages a porous structure to be treated and a vacuum is drawn on said second chamber said applicator head means is positively secured to the porous structure and sealed from the surrounding environment, fluids in and on the porous structure tend to be drawn therefrom and discharged from said applicator head means, and the fluid treatment material supplied to said first chamber impregnates the porous structure with the fluid treatment material.