Anti-vibration grinding device with hub and spring

Abstract

A grinding device including a grinding wheel, a hub attached to the grinding wheel, the hub movable relative to the grinding wheel in an axial direction of the hub.

What is claimed is: 
     
         1 . A grinding device, comprising:
 a grinding wheel;   a hub attached to the grinding wheel, the hub movable relative to the grinding wheel in an axial direction of the hub.   
     
     
         2 . The grinding device of  claim 1 , wherein the hub comprises a top flange, a bottom flange and a body extending between the top flange and bottom flange. 
     
     
         3 . The grinding device of  claim 2 , wherein the hub is biased downwardly with respect to the hub. 
     
     
         4 . The grinding device of  claim 2 , further comprising a spring between the top flange and a top surface of the grinding wheel. 
     
     
         5 . The grinding device of  claim 4 , wherein spring is a wave spring. 
     
     
         6 . The grinding device of  claim 1 , further comprising an abrasive surface on a bottom surface of the grinding wheel. 
     
     
         7 . The grinding device of  claim 2 , wherein the hub comprises a bolt forming the top flange and body and a nut forming the bottom flange releasably connected to the bolt. 
     
     
         8 . The grinding device of  claim 7 , wherein the bolt has external threads mating with internal threads of the nut. 
     
     
         9 . The grinding device of  claim 8 , wherein the bolt has internal threads configured to mate with a power tool. 
     
     
         10 . The grinding device of  claim 1 , wherein the hub is biased downwardly with respect to the hub by a bias member, and
 wherein a top end of the bias member is fixed with respect to the hub and a bottom end of the bias member bears against the grinding wheel.   
     
     
         11 . The grinding device of  claim 1 , wherein the bias member is a wave spring.