Rotary tool attachment for chain saw motor

Claim 1

A rotary tool attachment for a chain saw motor drive unit where such unit includes a motor, a motor housing, a motor-driven shaft connected to the motor and protruding to one side of the motor housing and a chain saw sprocket outside the motor housing joined to said shaft, said attachment comprising in operative position, an elongated support secured to said motor housing in a position extending normal to said shaft and having a remote end located forwardly of said housing; a tool-driving sprocket adjacent the remote end of said support generally in the plane of said chain saw sprocket; a power transmission input shaft mounting said tool-driving sprocket, said input shaft generally paralleling the motordriven shaft; a tool-housing assembly mounted on the remote end of said support receiving said transmission input shaft; releasable fastening means securing said housing assembly to said support, said fastening means when released permitting swinging of said housing assembly about the axis of said input shaft to different positions; a rotatable tool-driving head mounted on said housing assembly rotatable about an axis which is maintained substantially normal to the axis of said transmission input shaft with said housing assembly in any of said different positions; and a power-transmitting means with right-angle drive train within said housing assembly operatively connecting said input shaft and said driving head for producing rotation of said driving head about its axis upon rotation of said input shaft with the housing assembly in any one of said different positions.