New concepts in Jaw Crusher technology ScienceDirect. Mmeral,~ Engineering. Vol. 3, No. I/2, pp. 67 74, 1990 /90 + Printed in Great Britain 1990 Pergamon Press plc NEW CONCEPTS IN JAW CRUSHER TECHNOLOGY R. B. DeDIEMAR President, KUEKEN Corporation, Oakland, CA, ABSTRACT New ideas in primary Jaw Crusher design Design and .