ANCHORING BOLT HAVING AN EXTRUDING PISTON

摘要

21ANCHORING BOLTHAVING AN EXTRUDINGPISTON The invention provides an anchoring bolt comprising: a bolt tube having an inner wall which forms one or more indentations; and5 an extruding piston which has a sealing part to engage the one or more indentations to seal the extruding piston against the inner wall and/or to guide movement of the extruding piston through the bolt tube. Figure 1 is to be provided for publication.10