Pressurized abrasive cleaning device for use with plastic abrasive particles

摘要

An improved device for cleaning surfaces with plastic abrasive particles and for recovering the spent abrasive particles and debris removed from the surface in which the stream of abrasive particles is visible as it impinges against the surface being cleaned. A venturi nozzle adapted to be connected to a supply of pressurized air containing plastic abrasive particles is mounted on an end wall of a housing which forms a vacuum chamber. The housing includes a cylindrical glass sleeve which is removably mounted on a collar at its inner end and which is retained at its outer end by a retaining ring connected to the collar by a plurality of straps. A work ring is mounted on the outer end of the glass sleeve and is moved along the surface being cleaned. An exhaust tube adapted to be connected to a source of suction is connected to a rear end of the housing and the inlet end of the nozzle is located concentrically with the exhaust tube whereby the pressurized air supply line is mounted within the exhaust tube line. The removable glass sleeve of the housing provides visibility of the surface being cleaned by the stream of pressurized air and entrained plastic abrasive particles enabling the amount of dwell time of the stream of abrasive particles against the surface to be accurately controlled.