The apparatus for removing the waste layer arising in cutting porous concrete blocks comprises a beam (1) which extends above the porous concrete block in its longitudinal direction and can be raised and lowered, and at least two horizontal support frames (2, 2') mounted thereon and movable in height,...http://www.google.de/patents/US5513945?utm_source=gb-gplus-sharePatent US5513945 - Apparatus for removing the upper waste layer resulting in cutting plastic porous concrete blocks or the like
