MACHINE FOR DRIVING MINE ROOF PINS

A machine for driving mine roof pins having a pin-centering support extending along a cylinder and supported by a piston so as to move with the piston when the piston drives the pin along the cylinder and into a mine roof, the pin-centering support engaging the pin to guide and support the pin after...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	GERALD WAYNE ELDERS, JOHN RICHARD ALONGI, THOMAS EDWARD SCHNEIDER
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SHAFTS TUNNELS
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