Structure of an anti-burglar screw bolt

Details Structure of an anti-burglar screw bolt Structure of an anti-burglar screw bolt

F - Mech Eng,Light,Heat,Weapons

16

B

F16B 41/00 (2006.01) F16B 39/24 (2006.01) F16B 43/00 (2006.01)

Patent

CA 2438817

An anti-burglar screw bolt includes a bolt, first and second pads, and a nut. The bolt head is hexagonal, and consists of six sections of same shape each having a slope on a lower side and abutting a lower end of adjacent section at a higher end. Each of the pads has slopes like those of the bolt head; each of the pads has radial pointed bars formed on other side, and gaps on lateral side for a tool to engage, which is especially designed for undoing the bolt. The nut is hexagonal, and has slopes like those of the bolt head. The bolt is passed through the first pad, workpieces, and the second pad in sequence, and is screwed into the nut to fasten the workpieces together with the radial pointed bars being driven into surfaces of the workpieces. The bolt combination can't become loose because the pads abut both the bolt and the nut to hinder reverse rotation of the bolt that will undo the bolt.

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