Portable Apparatus for Blast Cleaning

Author:  Philip H. Diehn
Source:  US Patent 3,900,969
Doc ID:  1974025
Year of Publication:  1974
Abstract:  
An apparatus for blast cleaning a non-horizontal surface is disclosed. The device utilizes an airless blasting wheel to throw particulate abrasive upwardly agianst the surface to be cleaned with kinetic energy sufficient to insure rebound of the particulate material from the surface. A rebound corridor positioned to receive the rebounded particulate conducts the material back to a supply hopper for reuse. The supply hopper is located above the blast wheel and feeds it by gravity. An air stream is simultaneously passed through the rebound corridor for removing dust and fine particulate matter from the device.