Patent ID: 6955504
Filing Date: 2005-10-18
Classification: E21D

Abstract:
1. An attachment element ( 1 ; 51 ), comprising a boring head ( 5 ); a hollow cylindrical receiving body ( 2 ; 53 ) having, at an end ( 4 ) thereof facing in a setting direction (S) of the attachment element ( 1 ; 51 ), means for receiving the boring head ( 5 ) and at an opposite end ( 6 ) thereof, engagement means ( 7 ); at least one outlet opening ( 10 . 1 ; 10 . 2 ) through which a mortar mass located in the receiving body ( 2 ; 53 ) is squeezed out; a channel section ( 29 ) extending between the mortar mass and the at least one outlet opening ( 10 . 1 ; 10 . 2 ); a piston ( 27 ) for applying pressure to the mortar mass for squeezing the mortar mass through the at least one outlet opening ( 10 . 1 ; 10 . 2 ); an inner tube ( 21 ; 52 ) arranged in the receiving body ( 2 ; 53 ) at a predetermined distance from an inner wall of the receiving body ( 2 ; 53 ) for forming at least one suction channel ( 22 ; 42 . 1 ; 42 . 2 ) which is defined by space between the inner wall of the receiving body and an outer wall of the inner tube, the mortar mass and the channel section ( 29 ) being arranged in the inner tube ( 21 ); and spacer means ( 41 . 1 ; 41 . 2 ; 54 . 1 - 54 . 4 ) provided between the inner wall of the receiving body ( 2 ; 53 ) and the outer wall of the inner tube ( 21 ) for retaining the inner tube ( 21 ) at the predetermined distance from the inner wall of the receiving body ( 2 ; 53 ).