E - Fixed Constructions – 21 – C
Patent
E - Fixed Constructions
21
C
E21C 29/00 (2006.01) E21D 9/10 (2006.01) E21D 9/12 (2006.01)
Patent
CA 2109921
2109921 9221854 PCTABS00017 A mobile mining machine (10) has a wheel-like cutterhead assembly (12) supported by a pitch boom assembly (20). A swing boom assembly (24) supports the pitch boom assembly (20) and is supported by the base frame of the mobile mining machine. During mining, a fixed front support (132) and a fixed rear support (74) anchor the mobile mining machine in the tunnel with front and rear crawlers (154A, 154B, and 168A, 168B) raised from the tunnel floor. During re-gripping, the front and rear crawlers (154A, 154B and 168A, 168B) are lowered to support the mobile mining machine and the fixed front support (132) and fixed rear support (74) remain in contact with the tunnel floor. During tramming, the front and rear supports are raised for transportation of the mobile mining machine on the crawlers. A movable muck apron assembly (100) having pivoting apron wings (116A, 116B) and an integral muck hopper (108) is located on the front portion of the mobile mining machine.
Hartman Thomas Martin
Sugden David B.
Atlas Copco Robbins Inc.
Gowling Lafleur Henderson Llp
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