| 摘要 |
An anchor ( 910 ) for mounting to a hollow wall (W) made of friable material comprises a proximal flanged end ( 918 ) adapted to be engaged by a rotatable tool (B) to rotate the anchor ( 910 ) about a longitudinal axis (A) thereof and to cause is to gradually engage the wall (W). The anchor ( 910 ) also includes a distal end ( 912 ) adapted to cut through the wall (W) as the anchor ( 910 ) is rotated, and a shank ( 920 ) extending between the proximal and distal ends ( 918, 912 ). The shank ( 920 ) includes at least one expandable leg ( 924 ) that is in a collapsed position thereof when the anchor ( 910 ) is rotated to mount it to the wall (W) and that is located distally beyond a non visible surface of the wall (W) once the anchor ( 910 ) has been mounted to the wall and is in a first position thereof. The wall anchor ( 910 ) includes an outer thread ( 922 ) that securely engages the wall (W). A threaded fastener (B), e.g. a screw, is adapted to be introduced in the anchor ( 910 ) and to threadably engage the same distally of the leg ( 924 ) such that sufficient rotation of the threaded fastener (B) retracts the distal end ( 912 ) towards the proximal end ( 918 ) thereby causing the leg ( 924 ) to displace to a laterally expanded position thereof and to engage the non visible surface of the wall (W).
|
