Patent ID: 9279440
Filing Date: 2016-03-08
CPC Classification: F16B

Claim Text:
1. A fixing device for securing into a hole in plasterboard, comprising: a body being cylindrical, having a depth of between 9 mm and 18 mm a circular cross-section, having a threaded anchor receiving aperture coaxial with the body, and having a first passage and a second passage, each of said first passage and said second passage arranged to extends within the body, spaced from the anchor receiving aperture; a first shaft provided within the first passage, and a second shaft provided within the second passage, each of the first and second shafts being rotatably movable, independent of axial movement, within the respective first and second passage, each of the first and second shafts having respective limiting apparatus for limiting relative axis movement of the respective shaft within the respective passage; a first retaining member in the form of a flat plate of semi-circular profile coupled to the first shaft, and a second retaining member in the form of a flat plate of semi-circle profile coupled to the second shaft, each of the first and second retaining members having a thickness of between 0.8 mm and 1.2 mm, and configured to be movable between a respective extended position, in which the fixing device is retainable in said hole, and a respective retracted position, in which the fixing device is removably insertable into said hole, wherein each of the first and second retaining members has a surface area equal to one half of the circular cross-section of the body; at least one wing for preventing rotation of the fixing device about first axis parallel to the anchor receiving aperture, wherein the at least one wing is substantially trapezoidal and projects radially outward from the body, parallel to the first axis; a first recess and a second recess in a circular face of the body, each of the first and second recesses being in the form of a circular segment having a uniform depth, wherein the first passage is disposed in the first recess and eth second passage is disposed in the second recess, such that each respective limiting apparatus remains within the recess at a level defined below a top of the body; and a rectangular guide rail in the circular face of the body, the rectangular guide rail formed by the circular segment forms of the first and second recesses for orientation of the fixing device.