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    a scraper blade mounted to the bracket, the scraper blade having a first end, a second end opposite the first end, a first side and a second opposed side extending downwardly from the first end, the second side including a scraping surface, the second side meeting the second end at a junction point,    wherein the surface of the one of the pair of adjacent disk blades is convex, and    wherein the bracket is connected to the frame and the scraper blade is mounted to the bracket such that all of the scraper blade is positioned above the hub spool, the scraping surface is positioned adjacent the convex surface, and the junction point is adjacent the transition joint.    
     
     
         2 . The scraper of  claim 1  wherein: 
 the scraper blade is positioned on both sides of a vertical normal line to a center axis of the hub spool.    
     
     
         3 . The scraper of  claim 1  wherein: 
 the scraping surface is positioned behind the center axis of the hub spool in relation to a direction of movement of the tillage implement.    
     
     
         4 . The scraper of  claim 1  wherein: 
 the scraping surface contacts the convex surface.    
     
     
         5 . The scraper of  claim 1  wherein: 
 the scraper blade is rectangular.    
     
     
         6 . The scraper of  claim 1  wherein: 
 the junction point is 0.4 inches or less from the transition joint.    
     
     
         7 . The scraper of  claim 1  wherein: 
 the junction point is 0.03 to 0.13 inches from the transition joint.