Surface cleaning apparatus

Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof

Patent

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Details

51425, 51415, B24C 306, B24C 900

Patent

active

052611922

ABSTRACT:
An apparatus for cleaning a surface comprises a truck with a hydraulic system and a trailer with a blast assembly, dust collector and electric power generator. The apparatus is configurable into an operating mode and a transport mode. In the operating mode, the apparatus is driven by means of the hydraulic system, the blast assembly is lowered to the surface by a hydraulic cylinder and the blast assembly extends beyond the width of the trailer to clean a wide area. Abrasive material is propelled against the surface by a plurality of motor-driven centrifugal blast wheels and is returned for reuse by a return auger and an elevator. Air flow created by the dust collector facilitates return of spent abrasive material for reuse. In another preferred embodiment, a recapture assembly is attached to the blast assembly to capture abrasive material escaping between the blast assembly and the surface to be cleaned. In the transport mode, the apparatus is driven by the truck without use of the hydraulic system, the elevator is pivoted to an inclined position, and the blast assembly is both retracted toward the trailer and rotated to be entirely beneath the trailer.

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