Anchor for hollow walls

摘要

An anchor for mounting to a hollow wall made of friable material comprises a proximal flanged end adapted to be engaged by a rotatable tool to rotate the anchor about a longitudinal axis thereof and to cause is to gradually engage the wall. The anchor also includes a distal end adapted to cut through the wall as the anchor is rotated, and a shank extending between the proximal and distal ends. The shank includes at least one expandable leg that is in a collapsed position thereof when the anchor is rotated to mount it to the wall and that is located distally beyond a non visible surface of the wall once the anchor has been mounted to the wall and is in a first position thereof. The wall anchor includes an outer thread that securely engages the wall. A threaded fastener, e.g. a screw, is adapted to be introduced in the anchor and to threadably engage the same distally of the leg such that sufficient rotation of the threaded fastener retracts the distal end towards the proximal end thereby causing the leg to displace to a laterally expanded position thereof and to engage the non visible surface of the wall.

主权项

1. An anchor for mounting to a hollow wall, comprising a proximal end adapted to be engaged by a rotatable tool to rotate said anchor about a longitudinal axis thereof and to cause it 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 including at least one expandable leg, said expandable leg being in a 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 including outer threads, said anchor being adapted to receive therein a threaded fastener and to threadably engage the threaded fastener distally of said leg such that sufficient rotation of the threaded fastener retracts said distal end towards said proximal end thereby causing said leg to contract along said longitudinal axis and adopt a laterally expanded position thereof, wherein said outer threads include a first outer thread provided on said shank between said proximal end and said leg and engaged in the wall when said anchor is in said expanded position, and wherein said outer threads include a second outer thread provided around said leg.