MATERIAL FRACTURING APPARATUS

摘要

Material Fracturing Apparatus An impacting apparatus for fracturing material includes a housing and a fracturing shank which is mounted adjacent the housing so as to reciprocate about a pivot axis. The fracturing shank has an impact receiving portion and a sealing portion. The sealing portion has a cylindrical sealing surface which is arranged about a longitudinal axis. Such longitudinal axis is perpendicular to a radial line extending from the pivot axis and is inclined at a predetermined angle to a longitudinal axis extending through the impact receiving portion. An annular seal is connected to the sealing surface and the housing to obstruct the passage of material into and out of the housing. The seal has a flexible portion whose inner margin lies along the radial line.