Apparatus for comminuting tree stumps

The cutting roller defined in claim 26 wherein the cutting edges of the knives lie in horizontal planes parallel to each other and to the axis of the cutting roller.

A cutting knife assembly for use in chipping objects, such as tree stumps;

• the assembly comprising in combination, a knife-blade holding means adapted to be secured to a support member, such as a cutting roller, said holding means having a wall portion, said holding means including said wall portion defining a passage, a knife-blade receivable in said passage and having a cutting edge to be projected from the holding means, and means including a wedge member received in said passage for releasably securing said knife blade in said holding means against movement by wedging said knife blade against said wall portion.

A cutting knife assembly for use in chipping objects, such as tree stumps;

• the assembly comprising in combination, a knife-blade holding means adapted to be secured to a support member, such as a cutting roller, a knife-blade receivable in said holding means and having a cutting edge to be projected from the holding means, securing means including a wedge member for releasably securing said knife blade in said holding means against movement, said securing means further including means for releasably securing said wedge member in said holding means against movement, means for releasably securing said wedge member in said holding means comprising an anchor member located behind said holding means and said wedge member, and a fastener extending through said wedge member into said anchor member.

A cutting roller for chipping objects, such as rooted tree stumps upon rotation against the stump, the roller having a cylindrical surface and a parallity of knives projecting therefrom with cutting edges on their extremities, the cutting edges of the knives lying in horizontal planes parallel to each other and to the axis of the cutting roller, one half section of the roller from one end to the center thereof having knives extending outwardly towards said one end at an angle to a diametrical plane of the roller, the other half section of said roller from said other end of the roller to the center thereof having knives extending outwardly towards said other end at the same, but oppositely directed angle, said knives being positioned in staggered relationship throughout the circumference of the roller such that the roller will cut the stump at least once substantially along the entire length of the roller upon one complete revolution of the roller during use.