Patent ID: 8250828

Claim:
An anchor for use in a bore ( 130 ) of a lightweight construction panel ( 100 ) including a support core ( 121 ) with upper and lower cover plates ( 101 , 111 ) disposed on opposite sides of the support core ( 121 ), said anchor comprising a cylindrical body ( 10 ) provided with a bottom ( 140 ), a cement containment ( 40 ) and a displacement body ( 50 ) disposed in the cylindrical body ( 10 ), the cylindrical body ( 10 ) being provided with at least two engagement elements ( 22 ), which can be spread apart below the upper cover plate ( 101 ) by insertion of the displacement body ( 50 ) into the cylindrical body ( 10 ) via the bore ( 130 ), the cement containment ( 40 ) being disposed in an inner space ( 17 ) of the cylindrical body ( 10 ) which has several openings ( 16 , 39 , 142 , 143 ), the cement containment ( 40 ) having fracturable top and bottom covers ( 42 , 43 ), the bottom ( 140 ) of the cylindrical body ( 10 ) having opening elements ( 151 , 152 ) directed toward the bottom cover ( 43 ) of the cement containment ( 40 ) and stops ( 147 ) projecting upwardly above the opening elements ( 151 , 152 ) for temporarily supporting the cement containment ( 40 ), the displacement body ( 50 ) being disposed before insertion in the cylindrical body ( 10 ), above the cement containment ( 40 ) in a force-, form-, or material locking manner in a first position ( 87 ), the displacement body ( 50 ) having at its bottom side ( 83 ) opening elements ( 73 , 84 ) directed toward the top cover ( 42 ) of the cement containment ( 40 ), the displacement body ( 50 ) during its advance movement ( 6 ), upon insertion into the cylinder body ( 10 ), reaching a second position ( 88 ) in which engagement projections ( 74 ) thereof abut the cement containment ( 40 ) after opening the top cover ( 42 ) of the cement containment ( 40 ) and a displacement of a partial amount of the cement ( 8 ) in a direction opposite the advance movement of the displacement body ( 50 ), the displacement body ( 150 ), upon further insertion into the cement containment ( 40 ), overcoming the support force of the bottom stops ( 147 ) and reaching a third position ( 89 ) in which the cement containment ( 40 ) is pressed onto the opening elements ( 151 , 152 ) which rupture the bottom ( 43 ) of the cement containment ( 40 ), for the release of cement, the displacement body ( 50 ), upon overcoming the support force of the support projection ( 74 ) reaching a fourth, final, position ( 91 ) displacing a further partial amount of cement ( 8 ) via openings ( 39 , 142 , 143 ) into the cylinder bottom area in front of the lower cover plate ( 111 ) of the lightweight construction panel ( 100 ).