Patent ID: 8657384
Filing Date: 2014-02-25
Classification: E01C,E01H,E21C

Abstract:
1. An apparatus for scraping a surface, comprising: a frame connectable to a three point hitch of a tractor and pullable behind the tractor; a plurality of rotatable blade supports coupled to the frame; a plurality of scraping blades rigidly affixed to each blade support, the plurality of scraping blades each comprising a scraping edge constructed to contact, but not extend into, the surface, the plurality of blades angled outwardly from the blade support such that the scraping edges are not aligned coextensively with a radius of the blade support, each of the scraping edges having a width that exceeds a radius of the blade support, the scraping edges each extending beyond an outer edge of the blade support; a rotating lower shaft coupled to each blade support such that as the lower shafts rotate, the blade supports rotate thereby causing the plurality of scraping edges to scrape the surface.