Patent ID: 8424974
Filing Date: 2013-04-23
Classification: B28D

Abstract:
1. An apparatus for use on a portion of a milling or mining drum, adapted to be rotated in a cutting direction about a cylindrical axis defined by the drum, the apparatus comprising: a base adapted to be mounted to the drum, the base comprising an opening including a tapered first seat positioned near an upper end of the opening and a tapered second seat positioned near a lower end of the opening; an insert comprising a bore and an exterior surface; a cutter bit comprising a cutting tip and a shank extending from the cutting tip, the shank comprising a threaded portion and a tapered transition positioned between the cutting tip and the threaded portion; and a retainer comprising a threaded portion and a tapered flange; wherein a first portion of the exterior surface of the insert facing the base is tapered to engage the tapered first seat of the base, a second portion of the exterior surface of the insert facing away from the base is configured to deflect debris away from the base during use, a region of the bore of the insert is tapered to engage the tapered transition of the cutter bit, the tapered flange of the retainer is configured to engage the tapered second seat of the base, and the threaded portion of the retainer is configured to engage the threaded portion of the cutter bit.