Patent ID: 8485203

Claim:
A soiled surface cleaning apparatus, comprising: a low pressure prespray unit for producing a diluted prespray for application on soiled surfaces, including: a proportional pump for pumping a prespray into a stream of water, said proportional pump having, a first inlet for receiving water from a water service line, a second inlet for receiving a prespray, wherein said second inlet of said proportional pump is connectable to a source of prespray by a supply tube inserted in a container containing a prespray, and an outlet for providing a diluted prespray, wherein said proportional pump is driven by a stream of water from said water service line for pumping a prespray into said stream of water, wherein said prespray is mixed with said stream of water, and wherein a diluted prespray is provided at said outlet of said proportional pump; and a high pressure rinse unit for providing a rinse fluid for rinsing pre sprayed soiled surfaces, including: a combination of a motor driven triplex pump and a pressure regulating unloader for setting the pressure of water having, an inlet for receiving water from a water service line, and an outlet for delivering water at pressures higher than that of the pressure of the water in said water service line; a connecting line having an input and an output, said connecting line input for receiving water from said outlet of the triplex pump and unloader combination, and said connecting line output for providing a water rinse; wherein said prespray unit is operable to provide a diluted prespray to soiled surfaces at substantially the same time as said rinse unit is operable to provide a rinse to pre sprayed soiled surfaces.