Patent ID: 6299083
Filing Date: 2001-10-09
Classification: B02C

Abstract:
A head nut assembly for a gyratory crusher, the crusher including a shaft having a lower portion, a tapered middle portion and a threaded upper portion extending above the tapered portion and a mantle encompassing the tapered middle portion having a correspondingly tapered internal side and an upper side wherein the internal side is in generally continuous supportive engagement with the shaft middle portion, comprising:a head nut threadably secured to the upper portion of the shaft, having a lower face, wherein at least one bore extends vertically upward into the lower face;an annular ring disposed around the shaft between the mantle and the head nut, the ring having a lower surface secured to the upper side of the mantle so as to prevent relative rotational movement between the mantle and the ring, and an upper surface wherein the upper surface is contiguous with the lower face; andat least one key disposed between the head nut and the annular ring so as to rotationally couple the head nut to the annular ring, wherein the key is completely captured inside the head nut and annular ring.