Driven tubular wall-plug anchoring element for light and porous concrete

A tubular wall plug anchor assembly which can be inserted into gas-expanded concrete, light concrete, and the like material, comprising:

• a hollow longitudinal sleeve having an initial constant inner diameter, said sleeve having an upper unslotted portion and a lower slotted portion, said lower slotted portion defined by a plurality of longitudinal slots extending upwards from an open end of said sleeve;
• a head portion unitary with said sleeve, said head portion having a diameter greater than an outer diameter of said upper and lower portions;
• a spreading body adapted to be driven into said sleeve, said body being a single sphere for flaring said legs in anchoring effect, said sphere being adapted to be inserted from said head portion of said sleeve into said unslotted portion thereof, and also advanced into said slotted portion;
• and
• a driver, said driver having an end adapted to contact said spreading body and to drive said spreading body against any concrete material which has entered into said open end and into said unslotted portion of said sleeve, said end of said driver comprising an inclined wedge surface along and by which said single sphere at least in said slotted portion of said sleeve can be laterally displaced out of an initial position, which is co-incident with said central longitudinal axis, towards the respective sleeve walls away from said axis in a wedge-like movement.