EXPANSION SHELL ASSEMBLY

Mine roof expansion shell assembly having a one piece shell with annular ring and four expansion fingers with external gripping teeth extending from the ring, and an internal flat wedge engaging surface adjacent the other end, an expanding wedge having a threaded aperture for a mine roof bolt and we...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	LAMBERT C,US, DICKOW F,US
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING EARTH DRILLING ENGINEERING ELEMENTS AND UNITS FIXED CONSTRUCTIONS GALLERIES GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LARGE UNDERGROUND CHAMBERS LIGHTING MECHANICAL ENGINEERING MINING SHAFTS THERMAL INSULATION IN GENERAL TUNNELS WEAPONS
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Beschreibung
Zusammenfassung:	Mine roof expansion shell assembly having a one piece shell with annular ring and four expansion fingers with external gripping teeth extending from the ring, and an internal flat wedge engaging surface adjacent the other end, an expanding wedge having a threaded aperture for a mine roof bolt and wedge faces for each of the fingers, the fingers being spaced apart on opposite sides of the shell to form a slot for a wedge retaining U-shaped strap extending over the large diameter end of the wedge with its ends extending through the ring in grooves aligned with the slots, the ends being bent outwardly to engage the underside of the ring, the bent ends being held in place by resiliency of the strap, or the presence of a mine roof bolt threaded into the wedge, and extending through the ring.