Mobile Surface Treating Apparatus

Author:  Raymond M. Leliaert
Source:  US Patent 3,858,359
Doc ID:  1975007
Year of Publication:  1975
Abstract:  
A mobile apparatus for the surface treatment with ferromagnetic particulate material thrown onto the surface at high speed, includes a housing which encloses a device for projecting the material onto the surface. Elements are provided for removal of the particulate material from the surface including air jets for slightly lifting the material, a magnetic drum and a conveyor for attracting the forromagnetic material and conveying it for subsequent reuse.