Patents Assigned to Gwarectwo Mechanizacji Gornictwa "Polmag" Przedsiebiorstwo Panstwowe Fabryka Zmechanizowanych Obudow Scianowych Fazos
  • Patent number: 4856940
    Abstract: This invention relates to a lemniscate mining support comprising a foot piece, a roof bar, an anti-fall shield connected between the foot piece and the roof bar, and movable props between the roof bar and the foot piece so as to move the roof bar. The joints connecting the anti-fall shield to the foot piece and the anti-fall shield to the roof bar are positioned so that the anti-fall shield can be positioned at a steep angle, relative to the roof bar so that damage to the anti-fall shield can be minimized while allowing the anti-fall shield to contribute to the support of the roof bar.
    Type: Grant
    Filed: March 18, 1988
    Date of Patent: August 15, 1989
    Assignee: Gwarectwo Mechanizacji Gornictwa "Polmag" Przedsiebiorstwo Panstwowe Fabryka Zmechanizowanych Obudow Scianowych Fazos
    Inventors: Jerzy Cieslik, Marek Flak, Eugeniusz Kuczka, Franciszek Oles, Zdsizlaw Marszycki, Kornel Olender