Disk Blade Scrapers for Tillage Apparatus

Abstract

A disk blade scraper is used with a tillage implement having rotating disk blades separated by hub spools. In one form, the disk blade scraper has a wide tapered scraper blade positioned very close to the transition of the hub spool and the disk blade. In another form, the disk blade scraper incorporates a round disk having an edge that runs in the transition joint of the disk blade and the hub spool. In yet another form, the disk blade scraper incorporates a round and or square bar that is positioned in such a way that the bar end rubs against this transition joint. In still another form, the disk blade scraper incorporates a flat scraper blade shaped to fit the contour of the backside of the disk blade. The corner of this scraper is positioned very close to the transition joint of the disk blade and the hub spool.

1 . A disk blade scraper for a tillage implement having a frame, a horizontal shaft suspended from the frame, a plurality of rotating disk blades arranged in laterally spaced relationship on the shaft, a hub spool surrounding the shaft between at least a pair of adjacent disk blades wherein a first end of the hub spool contacts one of the pair of adjacent disk blades thereby creating a transition joint between the first end of the hub spool and a surface of the one of the pair of adjacent disk blades, the scraper comprising: 
 a bracket connected to the frame; and    an integral scraper blade mounted to the bracket, the scraper blade having a first end adjacent the mounting bracket, a first side and a second opposed side extending downwardly from the first end, the first side being shorter than the second side, and an opposite scraping end extending between the first side and the second side, the scraping end and the second side of the scraper blade meeting at a junction point,    wherein the bracket is connected to the frame and the scraper blade is mounted to the bracket such that the first side is further from the hub spool than the second side, and the junction point is adjacent the transition joint.    
     
     
         2 . The scraper of  claim 1  wherein: 
 the scraping end has a thickness in a direction normal to an outer surface of the scraper blade not exceeding a cross-sectional thickness of the first end in the direction.    
     
     
         3 . The scraper of  claim 1  wherein: 
 the surface of the one of the pair of adjacent disk blades is concave, an annular depression is formed in a region of the surface surrounding the transition joint, and the junction point is located within the depression.    
     
     
         4 . The scraper of  claim 1  wherein: 
 the junction point contacts the transition joint.    
     
     
         5 . The scraper of  claim 1  wherein: 
 the junction point is 0.4 inches or less from the transition joint.    
     
     
         6 . The scraper of  claim 1  wherein: 
 the junction point is 0.03 to 0.13 inches from the transition joint.    
     
     
         7 . The scraper of  claim 1  wherein: 
 the scraping end contacts the surface of the one of the pair of adjacent disk blades.    
     
     
         8 . The scraper of  claim 1  wherein: 
 the scraping end is 0.4 inches or less from one of the pair of adjacent disk blades.    
     
     
         9 . The scraper of  claim 1  wherein: 
 the scraping end is 0.03 to 0.13 inches from one of the pair of adjacent disk blades.    
     
     
         10 . The scraper of  claim 1  wherein: 
 the scraping end has a curved edge.