Abstract: A lightweight hand operated abrasive blasting apparatus operatively connected with a remote station arranged to provide an air stream with a particulate abrasive material, and an air suction, the apparatus having a housing with an open side facing a work surface that is to be blasted. The abrasive, such as steel grit, is carried to the center of an impeller wheel which centrifugally projects the abrasive in the form of a transversely elongated stream against the work surface, and a vacuum line connected with the housing draws the spent abrasive particles along with particles of material removed from the surface and delivers the material to the remote station for separation and reclaiming of the abrasive particles.
Abstract: A manually portable casing equipped with suitable handle means has an outer end opening and a sandblasting hood mounted in the casing has a corresponding outer end opening which fits into the outer end opening of the casing. A rotary blaster nozzle inside the hood is supplied with a stream of air entraining grit particles. A rim of the hood has a continuous resilient seal to contact a worksurface that is to be processed thereby to cut off the hood both from the atmosphere and the interior of the casing. The hood and its seal are shaped to cooperate with a particular worksurface configuration which may be concave, convex, angular, etc. Different hoods are used interchangeably to fit different worksurface configurations.
Abstract: To remove particles of debris from a floor surface, a hood is mounted on wheels to move over the floor with the open side of the hood facing downward to form a traveling chamber. An air jet nozzle inside the hood is directed downward and is moved in a circular horizontal orbit by a variable speed motor to agitate the debris particles as the hood travels. A pump is attached to the hood to maintain a vacuum therein and to withdraw from the hood a high velocity air stream entraining the agitated debris particles. The hood is manually steered and is driven by a variable speed motor.