US3771735A Gyratory crusher with labyrinth seal between
A gyratory crusher is provided with a labyrinth seal between its eccentric drive and its crusher cone comprising upper and lower sealing casings extending into each other and a grease filling the gap between these casings The outermost sealing casing is provided with a plurality of vertically spaced annular channels communicating with at least one grease supply nipple and the inside of this