Abstract: In order to design the positional displacement of the impact member structurally simple and operationally reliable in an impact crusher having a rotor 9 and an impact member provided in the housing in an adjustable position directly underneath the feed aperture of the material to be crushed, the impact member is provided with an impact plate linearly displaceable in relation to the rotor.

Abstract: An impact crusher with a rotor and one or more impact members interconnected to form an adjustable impact member system, a first impact member being mounted pivotally around a first horizontal axis by way of at least one drive means, on the second horizontal axis of which a further impact member, pivotal by way of at least one drive means, is provided, in which context the horizontal axis pivotally supporting the impact member is provided in the region of that end of the first impact member which is remote from the horizontal axis and the second impact member comprises one or more levers.