Suction tool

Abstract

A tool for effecting drilling and/or chiseling and including a tubular shaft ( 2 ) provided, at its one axial end, with a cutting head ( 5 ), and a connection member ( 3 ) provided at another axial end of the shaft ( 2 ) and equipped with a shank ( 4 ), with the connection member ( 3 ) having a cross-bore ( 7 ) opening into the through-channel ( 8 ) formed in the shaft ( 2 ) and, with the connection member having, along a substantial portion of its axial extent, a diameter (d 1 ) that at most corresponds to 1.6 of a diameter (d 2 ) of the shank ( 4 ).

What is claimed is:  
     
         1 . A tool for effecting at least one of drilling and chiseling, comprising a tubular shaft ( 2 ) provided, at one axial end thereof, with a cutting head ( 5 ) and having an axially extending through channel ( 8 ); and a connection member ( 3 ) provided at another axial end of the shaft ( 2 ) and equipped with a shank ( 4 ), the connection member ( 3 ) having a cross-bore ( 7 ) opening into the through-channel ( 8 ) of the shaft ( 2 ) and having, along a substantial portion of an axial extent thereof, a diameter (d 1 ) that at most corresponds to 1.6 of a diameter (d 2 ) of the shank ( 4 ).  
     
     
         2 . A tool according to    claim 1   , wherein the diameter (d 1 ) of the connection member ( 3 ) corresponds to 1÷1.2 of a diameter (d 2 ) of the shank.  
     
     
         3 . A tool according to    claim 2   , wherein the diameter of the connection member ( 3 ) corresponds to the diameter of the connection member ( 3 ) corresponds to the diameter of the cutting head.  
     
     
         4 . A tool according to    claim 1   , wherein the connection member ( 3 ) and the shaft ( 2 ) are connected with each other by a conventional joining technique.  
     
     
         5 . A tool according to    claim 4   , wherein the connection member ( 3 ) and the shaft ( 2 ) are connected with each other by one of soldering, gluing, welding and shrinking.  
     
     
         6 . A tool according to    claim 4   , wherein the connection member ( 3 ) and the shaft ( 2 ) are formlockingly connected with each other.