Rotatable point-attack bit with protective body

Abstract

A rotatable point-attack bit retained for rotation in a block bore, and used for impacting, fragmenting and removing material from a mine wall. An improved elongated tool body having at the front end a diamond-coated tungsten carbide wear tip that is rotationally symmetric about its longitudinal axis and contiguous with a protective tungsten carbide intermediary body, which is contiguous with the third section steel shank at the rear end.

Dependencies are inferred from the claim text.