Abstract: A rubber crumbing apparatus and method for making crumb rubber from tire chips is disclosed. The rubber crumbing apparatus comprises a frame assembly, a first cone assembly including a truncated cone having an interior surface and an opening extending therethrough, and a second cone assembly positioned substantially within the first cone assembly. The second cone assembly includes a truncated cone having an exterior surface in opposing relationship to interior surface of the first truncated cone. The second cone assembly rotates relative to the first cone assembly. A plurality of crumber blades are connected to one of the opposing surfaces and a plurality of beads are attached to the other opposing surface of the truncated cones. The crumber blades are in close proximity to said beads without contacting said beads as the second cone assembly rotates relative to the first cone assembly. Tire chips are fed between the truncated cones.

Abstract: A rubber crumbing apparatus and method for making crumb rubber from tire chips is disclosed. The rubber crumbing apparatus comprises a frame assembly, a first cone assembly including a truncated cone having an interior surface and an opening extending therethrough, and a second cone assembly positioned substantially within the first cone assembly. The second cone assembly includes a truncated cone having an exterior surface in opposing relationship to interior surface of the first truncated cone. The second cone assembly rotates relative to the first cone assembly. A plurality of crumber blades are connected to one of the opposing surfaces and a plurality of beads are attached to the other opposing surface of the truncated cones. The crumber blades are in close proximity to said beads without contacting said beads as the second cone assembly rotates relative to the first cone assembly. Tire chips are fed between the truncated cones.

Abstract: A sprocket and flexible tape combination is disclosed wherein the tape has a thickness which is a relatively large fraction of the radius of the sprocket so that the tape is relatively stiff. The tape has web areas between longitudinally adjacent apertures and has connecting areas laterally adjacent each aperture connecting longitudinally adjacent web areas. These connecting areas of the tape engage engagement shoulders which are disposed around the periphery of the sprocket and these engagement shoulders alternate with sprocket surfaces around the periphery. All of the engagement shoulders have the same radius from the axis and a sprocket tooth is mounted on each of the engagement shoulders to engage a respective aperture in the tape.