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 elongated bar mounted to the bracket, the bar having a longitudinal axis and a scraping surface at an end of the bar farthest from the bracket,    wherein the bracket is connected to the frame and the bar is mounted to the bracket such that the scraping surface is adjacent the transition joint and an imaginary straight line including the longitudinal axis intersects the hub spool if the imaginary straight line is extended beyond the end of the bar.    
     
     
         2 . The scraper of  claim 1  wherein: 
 the scraping surface contacts the transition joint.    
     
     
         3 . The scraper of  claim 1  wherein: 
 the scraping surface is 0.4 inches or less from the transition joint.    
     
     
         4 . The scraper of  claim 1  wherein: 
 the scraping surface is 0.03 to 0.13 inches from the transition joint.    
     
     
         5 . The scraper of  claim 1  wherein: 
 the scraping surface has at least a portion at an angle with respect to the longitudinal axis of the bar.    
     
     
         6 . The scraper of  claim 1  wherein: 
 the bar has a circular cross-section.    
     
     
         7 . The scraper of  claim 1  wherein: 
 the bar has a square cross-section.    
     
     
         8 . 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 scraping surface is located within the depression.    
     
     
         9 . The scraper of  claim 1  further comprising: 
 a second elongated bar mounted to the bracket, the second bar having a scraping surface at an end of the second bar farthest from the bracket,    wherein a second transition joint is formed between a second end of the hub spool and a surface of the other of the pair of adjacent disk blades, and    wherein the bracket is connected to the frame and the second bar is mounted to the bracket such that the scraping surface of the second bar is adjacent the second transition joint.    
     
     
         10 . The scraper of  claim 9  wherein: 
 the scraping surface of the second bar contacts the second transition joint.