Cleaning apparatus

Claim 1

A cleaning apparatus having coacting wetting and drying means comprising first and second conduit members disposed in concentric relationship wherein said second conduit extends longitudinally within said first conduit, a cleaning head, a vacuum source, and a pressurized cleaning-liquid source, said first and second conduit members each having one end thereof connected to said cleaning head, said first conduit having the opposite end thereof connected to said vacuum source, and said second conduit having the opposite end thereof connected with the pressurized liquid source, said vacuum and pressurized liquid sources being concurrently operable whereby pressurized liquid can be applied through said cleaning bead upon a surface to be cleaned, said applied liquid being momentarily thereafter withdrawn from said surface through said cleaning head under subatmospheric pressure, said cleaning head comprising peripheral means including a yieldable flange extending peripherally therearound for sealing the liquid within the confines of the head during application of the cleaning liquid to the surface being cleaned, scouring means having a scouring surface normally recessed with respect to said yieldable flange and being in contact with the surface being cleaned when said cleaning head is urged against said surface to be cleaned thereby causing retraction of said yieldable flange, said scouring means being provided with a plurality of orifices, said one end of said second conduit being branched into a plurality of trunk lines whereby pressurized liquid emitted through said orifice is applied through said scouring surface upon said surface to be cleaned, heater means immersed in said cleaning-liquid, thermostat means for regulating the temperature of said cleaningliquid, and valve means connected to said second conduit member, said valve means being manually operable whereby the passage of cleaning-liquid through said cleaning head is regulatable.