| 摘要 |
An air sweep system for a mobile surface abrading apparatus designed for cleaning and texturing the surface of horizontal, or near horizontal, structures, particularly roads, highways, airport runways and the like. Abrasive particles such as steel shot or grit are projected at the structure surface in angular relationship to abrade and etch the surface and the abrasive is swept by a current of air into one or more vertical abrasive conveyors, where it is transferred by air to a rotating screen, separated from the air, road debris and dust in the screen, recycled and repeatedly projected onto the surface to be treated. Air flow through a sweeper channel upwardly through the vertical abrasive conveyor(s) is carefully controlled to lift the abrasive particles, as well as the dust and debris, beyond the rebound energy boundary and effect efficient recycling of the particles.
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