Hole abrading tool

Abstract

An abrading tool forms a plurality of grooves in an inner wall surface of a hole having a diameter and a depth, and defining a longitudinal axis, into which an anchor is installed. The tool is configured for mounting to a rotating driver to provide rotational movement to the tool. The tool has a shank having a first end for securing to the rotating driver and a second, free end. The shank has a diameter. A first abrading element is mounted to the shank proximal to the free end. A second abrading element is mounted to the shank spaced from the first abrading element and proximal to the rotating driver. The first and second abrading wheels have a diameter greater than the diameter of the shank. The tool is inserted into the hole and held at an angle relative to the longitudinal axis of the hole. With the rotating driver actuated, the tool is rotated around the hole to form first and second grooves in the inner wall surface of the hole.

What is claimed is:  
     
         1 . An abrading tool for forming a plurality of grooves in an inner wall surface of a hole formed in a material, the hole having a diameter and a depth defining a longitudinal axis, the tool being configured for mounting to a rotating driver to provide rotational movement to the tool, the tool comprising: 
 a shank having a first end for securing to the rotating driver and a second, free end, the shank having a diameter;    a first abrading element mounted to the shank proximal to the free end, the first abrading element having a diameter greater than the diameter of the shank; and    a second abrading element mounted to the shank spaced from the first abrading element and proximal to the rotating driver, the second abrading element having a diameter greater than the diameter of the shank,    wherein the tool is inserted into the hole and held at an angle relative to the longitudinal axis of the hole, and with the rotating driver actuated, the tool is rotated around the hole to form first and second grooves in the inner wall surface of the hole by contact of the abrading elements with the inner wall surface of the hole.    
     
     
         2 . The abrading tool in accordance with  claim 1  wherein the abrading elements are abrading wheels.  
     
     
         3 . The abrading tool in accordance with  claim 1  including a bearing element disposed on the shank intermediate the first abrading element and the first end.  
     
     
         4 . The abrading tool in accordance with  claim 1  wherein the abrading elements are permanently affixed to the shank.  
     
     
         5 . The abrading tool in accordance with  claim 1  wherein the diameter of the first abrading element is about equal to the diameter of the second abrading element.  
     
     
         6 . The abrading tool in accordance with  claim 1  wherein each of the abrading elements has a thickness of about ⅛ inch to about ⅜ inch.  
     
     
         7 . The abrading tool in accordance with  claim 1  wherein the abrading elements are removably mounted to the shank.  
     
     
         8 . The abrading tool in accordance with  claim 7  including a spacing member positioned between the first and second abrading elements.  
     
     
         9 . The abrading tool in accordance with  claim 8  wherein the spacing member is a sleeve positioned about the shank.  
     
     
         10 . The abrading tool in accordance with  claim 7  including mounting disks positioned adjacent the abrading elements.  
     
     
         11 . The abrading tool in accordance with  claim 10  wherein the mounting disks are rotationally fixedly mounted to the shank and the abrading elements are mounted to the mounting disks.  
     
     
         12 . The abrading tool in accordance with  claim 11  wherein the mounting disks include pins extending therefrom for receipt in a cooperating opening formed in a respective one of the abrading elements.  
     
     
         13 . The abrading tool in accordance with  claim 11  wherein the mounting disks include openings formed therein for carriage by the shank, and wherein the openings are eccentrically disposed relative to a center of the disk.  
     
     
         14 . The abrading tool in accordance with  claim 1  wherein the abrading elements are formed from a diamond containing material.  
     
     
         15 . A method for preparing a hole for installing an associated anchor therein, comprising: 
 providing a hole for the anchor, the hole defined by a cylindrical inner wall surface and defining a longitudinal axis;    providing an abrading tool having a shank having an axis, the shank having a first end for securing to a rotating driver and a second, free end, the shank having a diameter, a first abrading element mounted to the shank proximal to the free end, the first abrading element having a diameter greater than the diameter of the shank, and a second abrading element mounted to the shank spaced from the first abrading element and proximal to the rotating driver, the second abrading element having a diameter greater than the diameter of the shank; 
 inserting the abrading tool into the hole;  
 orienting the tool with its axis askew of the longitudinal axis of the hole;  
 rotating the tool about its axis; and  
 contacting the first and second abrading elements with the cylindrical inner wall surface of the hole, in a circular pattern, to form first and second grooves in the inner cylindrical wall surface.  
   
     
     
         16 . The method in accordance with  claim 15  wherein the tool includes mounting disks positioned adjacent the abrading elements, the disks having a diameter less than the diameter of the abrading elements, and wherein the method further includes the step of contacting the mounting disks with the cylindrical inner wall surface of the hole to stop further groove formation by the abrading elements.  
     
     
         17 . The method in accordance with  claim 15  wherein the abrading elements are abrading wheels.