Image Number 3 for United States Patent #4998574.
A cutting bit for mounting in a block mount. The cutting bit including a working head and a shank depending therefrom. The shank includes a recess formed within at least one side portion thereof. The block mount includes two matching half members secured on opposing sides of a rotating disc. A slot extends perpendicularly across at least one of the half members to receive the shank in a wedge like fit. Formed within the slot is a pin for mating engagement with the recess.