Mineral Winning Pick, Pick Holder, And Combination

摘要

An improved pick and pick holder assembly for use in mineral winning and the like. The improved pick and pick holder increases the effective life of a tool and pick holder by minimizing the shifting of the pick within the pick holder. The movement of the pick is minimized by front and rear bearing surfaces that remain positively engaged with front and rear bearing surfaces of the pick holder for loads applied to the pick that are predominantly inward and predominantly rearward.

主权项

1. A pick for attachment to an excavating machine for working a material to be excavated, the pick comprising:
a head configured to impinge on the material to be excavated with speed and force to fracture and separate the material; and a shank to be releasably retained in a pick holder mounted on the excavating machine, the shank having bearing surfaces to bear against bearing surfaces on the pick holder, wherein the bearing surfaces on the shank and the bearing surfaces on the holder tend to bear against one another when the forces on the head are between inward and rearward.