Tool retainer

A cutting tool assembly comprising:

• a cutting bit having a head comprising of a body located longitudinally below a cutting element and a shoulder located below said body, and a cylindrical shank that has an outer wall having a longitudinal length that extends in a longitudinal direction from below said shoulder, and a recess groove that is located on said outer wall of said cylindrical shank;
• a cutting bit holder having an internal cylindrical bore and a front face, and wherein said internal cylindrical bore has a mouth, and wherein said internal cylindrical bore has a longitudinal length that extends in a longitudinal direction of said cylindrical shank, and wherein said internal cylindrical bore has an internal recessed radial groove;
• a washer having a center hole, and wherein said washer is located between said shoulder of said cutting bit and said front face of said cutting bit holder;
• and
• a cylindrical retainer sleeve having an outer wall, said cylindrical retainer sleeve has a longitudinal length, and a split that is located on the circumference of said outer wall that forms an opening on said cylindrical retainer sleeve and wherein said split extends in a longitudinal direction along the longitudinal length of said cylindrical retainer sleeve, and wherein said retainer sleeve having only a single radially outward projecting longitudinal external tab located on said outer wall, and wherein said outer wall of said retainer sleeve has only two internal radial tabs opposite each other, and wherein the radially outward projecting longitudinal external tab is located centered between the two internal radial tabs, and wherein said opening of said split of said cylindrical retainer sleeve is located opposite of said radially outward projecting longitudinal external tab, and wherein said cylindrical retainer sleeve fits inside said internal cylindrical bore of said cutting bit holder, and wherein said cylindrical shank fits inside said cylindrical retainer sleeve, and wherein said outward projecting longitudinal external tab fits into said internal recessed groove of said internal cylindrical bore of said cutting bit holder, and wherein each of said two internal radial tabs bias against and fit into said recess groove that is located on said outer wall of said cylindrical shank.

A cylindrical retainer sleeve comprising:

• a cylindrical outer wall that has a circumference and a longitudinal length, and a split that is located on the circumference of said outer wall that forms an opening on said cylindrical retainer sleeve and wherein said split extends in a longitudinal direction along the longitudinal length of said cylindrical retainer sleeve, and wherein said retainer sleeve has only a single radially outward projecting longitudinal external tab located on said outer wall, and wherein said outer wall of said retainer sleeve has only two internal radial tabs opposite each other, and wherein the radially outward projecting longitudinal external tab is located centered between the two internal radial tabs, and wherein said opening of said split of said cylindrical retainer sleeve is located opposite of said radially outward projecting longitudinal external tab, and wherein said cylindrical retainer sleeve fits inside and an internal cylindrical bore of a cutting bit holder, and wherein a cylindrical shank fits inside said cylindrical retainer sleeve, and wherein said outward projecting longitudinal external tab fits into an internal recessed radial groove of said internal cylindrical bore of said cutting bit holder, and wherein each of said two internal radial tabs bias against and fit into a recess groove that is located on an outer wall of said cylindrical shank.