Anchor Installation Tool

Abstract

An anchor installation tool has an elongated driving member with a body portion and a head portion. A retaining mechanism retains the anchor installation to the drill bit. The mechanism has a housing on the body portion with a pair of bias lugs that project through the body portion to contact the drill bit. An anchor guide slides on the body and head portion and has a holding member to hold an anchor. The anchor is held in the anchor guide and a drill bit is inserted into the driving member. Axial movement of the drill bit is transferred into axial movement of the driving member. The movement strikes the anchor and ejects the anchor from the anchor guide into a surface.

1 - 11 . (canceled) 
     
     
         12 . A drill bit for an anchor installation tool comprising:
 a front cutting portion having at least one cutting flute,   an intermediate portion having a groove configured to releasably couple the body to an anchor installation tool,   a rear shank portion including a connector configured to connect the shank portion to a chuck of a drill; and   a shoulder at a junction between the front cutting portion and the intermediate portion, the shoulder including a substantially flat surface oriented substantially transverse to an axis of the drill bit, the substantially flat surface spaced a desired distance from the groove so that when the drill bit is positioned in the anchor installation tool, the substantially flat surface contacts internal shoulder in the anchor installation tool for transferring axial movement of the drill bit to the anchor installation tool.   
     
     
         13 . The drill bit of  claim 12 , wherein the cutting portion comprises masonry type cutting surfaces. 
     
     
         14 . The drill bit of  claim 12 , wherein the groove comprises an annular groove. 
     
     
         15 . The drill bit of  claim 12 , wherein the connector comprises a hex-shaped shank. 
     
     
         16 . The drill bit of  claim 12 , wherein the connector comprises an SDS-type connector. 
     
     
         17 . The drill bit of  claim 12 , wherein the substantially flat surface is substantially perpendicular to the drill bit axis. 
     
     
         18 . The drill bit of  claim 12 , wherein the substantially flat surface is spaced approximately 4.65 mm to approximately 4.85 mm from the groove. 
     
     
         19 . The drill bit of  claim 12 , wherein the shoulder further includes a chamfered surface between the substantially flat surface and the shank portion. 
     
     
         20 . The drill bit of  claim 14 , wherein the shoulder further includes a radiused surface between the substantially flat surface and the intermediate portion.