Tool holder

Claim 1

In a tool holder; a support member having a notch in one end with a planar rearward wall and a planar bottom wall at right angles to one another, a block receivable in said notch and having a planar rear side adajcent said rearward wall and a planar lower side adjacent said bottom wall, said rear side and lower side of said block being at right angles to one another, insert receiving pocket means in the upper side of said block at the forward end of the block, cooperating elements of rib and groove means on said bottom wall of said notch and said lower side of said block operable to interlock said block and support member against relative lateral movement and against relative fore and aft movement in at least one direction, and interengageable elements of relatively rotatable cam locking means on said block and support member, said cam locking means including a pair of laterally spaced rearwardly facing surface regions on opposite side regions of the rear side of the block which incline forwardly in the upward direction and a cam member rotatable in the support member and having eccentric regions at the ends engageable with said inclined surface regions, rotation of said cam member comprising the sole means for clamping said block in said notch in said support member and for releasing said block from said notch for removal thereof from said support member, said support member including a lateral recess therein formed inwardly into said rearward wall, said recess including enlarged end regions, said cam member having a central region rotatably seated in the recess between said enlarged ends and the said eccentric regions of said cam member being disposed in said enlarged end regions of said recess and in coplanar relation with said rearwardly facing surface regions on said block, said eccentric regions having flats thereon which substantially register with the plane of said rearward wall of said notch in the support member in one rotated position of said cam member.