Miniature impact tool

A miniature impact tool comprising:

• rotary means adapted for being driven in a rotary motion;
• linear reciprocating means abutting said rotary means for converting the rotary motion to a linear motion, said linear reciprocating means including a toolholder, said toolholder including a cylindrical flange located on an intermediate portion of said toolholder, said toolholder including a body that is cylindrically shaped for a predetermined axial distance on one side of said cylindrical flange, the end of said one side of said toolholder away from said cylindrical flange having a segment of circle cross-sectional area forming a flat area in the axial direction extending from said cylindrical shape, the other side of said cylindrical flange being cylindrically shaped and having threading and an aperture arrangement adapted to hold a tool at the end of said other side away from said cylindrical flange;
• a threaded sleeve connected to said toolholder threading;
• a housing enclosing said rotating means and a substantial portion of said linear reciprocating means, said housing including a housing aperture, said housing aperture having an outer section enclosing a portion of said toolholder including said flange and being of a diameter larger than the diameter of said toolholder flange and said housing aperture having an inner section enclosing a portion of said toolholder and being of a diameter smaller than said toolholder flange;
• and
• retaining means for retaining said toolholder including 0 rings encircling and abutting a portion of said toolholder positioned on both sides of said toolholder flange, and a retainer having an aperture for insertion of said toolholder, said retainer inserted in the outer portion of said housing aperture and connected to said housing, said retainer located for abutting one of said 0 rings.