Dowel, for mounting an insulation board at a support structure, has cutters under the pressure plate and around its circumference, to cut into the board to recess the dowel without environmental damage

摘要

The dowel (1), for mounting an insulation board (2) at a supporting structure (3), has a pressure plate (13) with a dowel sleeve (15) to hold a spreader (11) with a spreader head (12). The dowel sleeve has a spreading zone (18). Cutters (17) are at the under side of the pressure plate, and around its circumference, to cut into the insulation board when the pressure plate is tightened with a simultaneous compression.