Friction bolt assembly

A friction bolt assembly (100) has a longitudinally extending generally tubular friction bolt body (110) defining a cavity (113) and having a split longitudinally extending along the friction bolt body (110). A rod (120) longitudinally extends through the cavity (113). An expansion element (130) is...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	Evans, David William
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:	A friction bolt assembly (100) has a longitudinally extending generally tubular friction bolt body (110) defining a cavity (113) and having a split longitudinally extending along the friction bolt body (110). A rod (120) longitudinally extends through the cavity (113). An expansion element (130) is mounted on, or integrally formed with, the rod (120) at or adjacent the rod leading end (121). The expansion element (130) has an engagement surface (136) tapering toward the rod trailing end (122). A sleeve ( 180) is mounted on the expansion element (130) adjacent the friction bolt body leading end (111). A drive head (140) is mounted on, or integrally formed with, the rod (120) at or adjacent the rod trailing end (122). The rod (120) is actuatable by rotation of the drive head (140) to draw the expansion element (130) toward the friction bolt body trailing end (112) such that the sleeve trailing end (182) abuts the friction bolt body leading end (111) and the engagement surface (136) engages the sleeve interior surface (185), radially outwardly deforming the sleeve (180).