Patent ID: 8061373

Claim:
A surface cleaning apparatus, comprising, in combination: a mobile liquid storage trailer having a tank, at least one tank pump delivering pressurized liquid from the tank; a hose reel in communication with the tank pump; a selectively operated wand on an end of the hose reel; a self-propelled vehicle selectively coupled to the trailer, the vehicle having a front, a rear, a top, a bottom, and a width no greater than six feet, the vehicle further comprising: a vehicle pump further pressurizing liquid received from the tank pump; a supply manifold in communication with the vehicle pump, whereby the combined tank pump, vehicle pump, and supply manifold provide a continuous minimum 4,000 psi of liquid pressure; a forward rotary housing on the bottom of and proximal to the front of the vehicle, the forward rotary housing disposed centrally to a centerline of the vehicle, the forward rotary housing having a circular outer border; a pair of spaced apart rearward rotary housings disposed behind the forward rotary housing, each rearward rotary housing disposed outside the centerline of the vehicle, each rearward rotary housing having a circular outer border; a trio of rotating delivery pipes equidistantly radiated from a center of each rotary housing, each trio in communication with the manifold; a liquid spray jet on an end of each delivery pipe; a plurality of spaced apart casters on a bottom of each housing outer border; a pair of spaced apart pivots affixed to a top of the forward rotary housing; a spring loaded arm affixed to a top of each rearward rotary housing, each arm further affixed to one of the pivots of the forward rotary housing, respectively; whereby inward and subsequent outward rebound movement of either of the rearward rotary housings is provided upon border impact with an extraneous object.