EXPANSION ANCHOR

• Main Author: SCHAEFFER, MARC
• Format: Patent
• Language: English; French
• Published: 22.03.2022
• Subjects: BLASTING; BUILDING; CEILINGS; DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING; EARTH DRILLING; EMBANKMENTS; ENGINEERING ELEMENTS AND UNITS; EXCAVATIONS; FIXED CONSTRUCTIONS; FLOORS; FOUNDATIONS; GALLERIES; GENERAL BUILDING CONSTRUCTIONS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HYDRAULIC ENGINEERING; INSULATION OR OTHER PROTECTION OF BUILDINGS; LARGE UNDERGROUND CHAMBERS; LIGHTING; MECHANICAL ENGINEERING; MINING; ROOFS; SHAFTS; SOIL SHIFTING; THERMAL INSULATION IN GENERAL; TUNNELS; UNDERGROUND OR UNDERWATER STRUCTURES; WALLS, e.g. PARTITIONS; WEAPONS

The invention relates to an expansion anchor (1) having a bolt (10) which has a neck area (11) and an expansion area adjoining the neck area, in which the bolt tapers towards the neck area, the bolt having a groove in the neck area which groove extends along the bolt, and having an expansion sleeve which at least partly surrounds the bolt and which has a web on the inner side thereof, the web engaging in the groove in the neck area, at least in some regions, and the wall thickness of the expansion sleeve being increased locally by the web, wherein the expansion sleeve can be displaced along the bolt out of the neck area into the expansion area while radially widening the expansion sleeve. According to the invention, as the expansion sleeve is displaced from the neck area into the expansion area, the web reaches the expansion area, at least in some regions, and is forced radially outward by the expansion area. Linvention concerne une coquille dexpansion (1) comportant un boulon (10), qui possède une zone de col (11) et une zone dexpansion, adjacente à la zone de col, dans laquelle le boulon samincit en direction de la zone de col, le boulon comportant dans la zone de col une rainure qui sétend le long du boulon, et une gaine dexpansion qui entoure le boulon au moins par zones et qui comporte une âme sur sa face intérieure. Lâme sengage au moins par zones dans la gorge dans la zone de col, et lépaisseur de la gaine dexpansion est augmentée localement par lâme. La gaine dexpansion est mobile le long du boulon de la zone de col jusque dans la zone dexpansion alors que la gaine dexpansion subit un élargissement radial. Linvention est caractérisée en ce que, lors du déplacement de la gaine dexpansion, lâme pénètre au moins par zones de la zone de col dans la zone dexpansion et est poussée radialement de la zone dexpansion vers lextérieur.