Patent ID: 7654781
Filing Date: 2010-02-02
Classification: F16B

Abstract:
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 same 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 displace to a laterally expanded position thereof, said outer threads including a first outer thread provided on said shank between said proximal end and said leg and engaged in the wall when said leg is in said expanded position, a second outer thread provided between said leg and said distal end and a third outer thread provided around said leg, said first, second and third outer threads having a substantially same pitch.