Miniature impact tool

An impact tool comprising:

• rotary means adapted for being driven in a rotary motion, said rotary means including a drive shaft that is biased in a forward direction by a spring means and a cam attached to said drive shaft,
• linear reciprocating means abutting said rotary means for converting said rotary motion to a linear motion, said linear reciprocating means including a bearing having a surface in contact with said cam, said bearing being moved in a backward longitudinal direction as said cam rotates,
• an output shaft having at one end thereof an aperture for holding a cutting chisel,
• means for preventing rotation of said output shaft,
• a housing enclosing said rotary means, said output shaft and said linear reciprocating means,
• a striker that is movable in a backward longitudinal direction by the action of said cam and a plunger/spring assembly including a plunger and a spring where said plunger is in contact with said striker and causes said striker to move in a forward longitudinal direction for providing an impact force to said output shaft, said housing having a shelf means for substantially preventing the movement of said striker in a direction transverse to its longitudinal motion when striking said output shaft and recoiling therefrom, said striker having a guide means at a striker surface that is contacted by said plunger, at least a portion of said plunger being located in said guide means during longitudinal movement of said striker, and
• isolation means for suspending said output shaft longitudinally including elastomeric rings encircling and abutting said output shaft.