Patent ID: 8607393

Claim:
A portable apparatus for treating a surface and comprising: a handle having a proximal portion for holding in a person's hand and a distal portion for delivering a mobilizing fluid to the surface; a fluid supply fitting at the proximal portion for connection to a source of mobilizing fluid; a housing at the distal portion of the handle; a nozzle at the housing, said nozzle having an inlet to receive said mobilizing fluid, and said nozzle having an outlet to discharge said mobilizing fluid in a direction; a wheel mounted in the housing for rotation on an axis in the housing; and a mobilizing fluid delivery passageway from said supply fitting to said nozzle inlet; and wherein: said nozzle is movable from one orientation to another orientation to change discharge direction of said mobilizing fluid from said nozzle outlet relative to said axis, the apparatus further comprising: a plurality of surface treating elements circularly spaced around the wheel, wherein said surface treating elements have a front face and a back face bordered by edges and are mounted on said wheel and pivotal between an extended outward condition relative to said axis with said back face oriented facing said nozzle when said nozzle is in said one orientation, and a collapsed condition upon impact with a surface being treated, said surface treating elements being supported by stops on said wheel engage-able by said front face of said surface treating elements to prevent said surface treating elements from being collapsed by impact of said fluid impingement from said nozzle on said back face.