Hermann Hemscheidt Maschinenfabrik Gmbh & Co.

Gerhard Ewich

Josef Welzel

Alfred Maykemper

Hans Bull

Gunther Kuschke

A self-advancing mine roof support has a beam-like abutment adapted to be disposed generally adjacent and parallel to a work face. Three roof support elements are spaced apart along the abutment and are pivoted to the abutment. The abutment may be angled relative to the direction of advance by arranging the three support elements in staggered formation. A beam of the central support element is pivoted to the abutment. The two outer roof support elements are connected to the abutment by a linkage, e.g., guide arms, which allows the abutment to pivot about the beam of the central element without changing the distance between the three elements as measured at right angles to the direction of advance.

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Wuppertal, Germany

Gerhard Ewich