Patent ID: 8250823

Claim:
A dowel ( 1 ) for use in the assembly of an insulating plate ( 2 ) on a substructure ( 3 ), said dowel ( 1 ) having a pressing plate ( 13 ) and a dowel sleeve ( 15 ) attached to said pressing plate ( 13 ) for taking up an expansion element ( 11 ) having an expansion element head ( 12 ), wherein the dowel sleeve ( 15 ) comprises an expansion zone ( 18 ), characterized by said pressing plate ( 13 ) having a single planar lower side with a single outer circumference; and cutting elements on the lower side of the pressing plate consisting of a tooth-shaped cutting edge ( 17 ) extending from the lower side of the pressing plate ( 13 ) at the outer circumference of said pressing plate, said cutting elements being curved along a circumferential length to substantially follow said pressing plate outer circumference and adapted to cut a smooth circular face into the insulating plate ( 2 ) during pulling in of said pressing plate ( 13 ) into the insulating plate ( 2 ) under simultaneous compression of said insulating plate ( 2 ).