HARD NOSE AND CUTTING TOOL HAVING HARD NOSE WITH PROJECTIONS Russian patent published in 1997 - IPC

FIELD: cutting tools for earth excavation and provided with elongated body with hard nose rigidly attached to its front end. SUBSTANCE: hard nose has many integral coaxial sections including all-ribbed section which has many longitudinal ribs located over its periphery. Nose additionally includes integral section with protrusions which serves as the base of nose and includes many protrusions running in radial direction. Transition zone as integral component ensures transition between ribbed section and section which serves as the base. EFFECT: higher efficiency. 7 cl, 15 dwg