Wall anchor with deformable expandable part

A wail anchor for mounting to a hollow wail, comprising a main body and an anchor member,

• the main body including:
• a proximal end adapted to be engaged by a rotatable tool to rotate said wall anchor about a longitudinal axis thereof and to cause it the wall anchor to gradually engage a wall;
• a distal end adapted to cut through the wall as said anchor is rotated;
• and
• a shank between said proximal and distal ends, said shank having a substantially cylindrical section comprising an internal cavity, and defining at least one slot therein having an angled surface relative to the longitudinal axis thereof, and
• the anchor member including:
• a body having a proximal end and an axial hole;
• and
• at least one expandable leg joined to the body thereof at a joint, and a body defining a hole,
• the body thereof being located in an the internal cavity defined in of the shank, with the at least one expandable leg being in registry with the at least one slot, and the at least one expendable leg being displaceable between i) an inwardly collapsed position wherein the at least one expandable leg registers within the at least one slot and a cylindrical outer surface of the shank, and ii) an outwardly expanded positions wherein the at least one expandable leg extends at least partially outside the at least one slot, said expandable leg being in the collapsed position thereof when said anchor is rotated to mount it to the wall and being located distally past a rear surface of the wall once said anchor is mounted to the wall, said anchor being adapted to receive therein a threaded fastener and to threadably engage the body of the anchor member distally of said leg such that sufficient rotation of the threaded fastener retracts said body of the anchor member towards said proximal end thereby causing said expandable leg to extend outwardly through the slot to the expanded position of the expandable leg,
• wherein the at least one expandable leg is in the collapsed position thereof when said wail anchor is rotated to mount it to the wall until the slot is substantially past a rear surface of the wall, and
• wherein said wall anchor is adapted to receive therein a threaded fastener engaging the body of the anchor member, wherein rotating the threaded fastener causes the body of the anchor member to retract towards the proximal end of the main body thereby causing the at least one expandable leg to slide over the angled surface of the slot forcing the leg to extend outwardly through the slot, and
• wherein the at least one leg is adapted to gradually increase pressure over the rear surface of the wall as the body of the anchor member is retracted.