Method and apparatus for a theft resistant fastener

Details Method and apparatus for a theft resistant fastener Method and apparatus for a theft resistant fastener

B - Operations, Transporting

25

B

B25B 23/10 (2006.01) B25B 13/48 (2006.01) F16B 23/00 (2006.01) F16B 29/00 (2006.01) F16B 41/00 (2006.01)

Patent

CA 2218753

This invention relates to a method and apparatus for fastening two members together with a theft resistant screw (1) having a head (3) with a top surface (18) free of any engageable indentations or protrusions, and a wrench (2) to drive the screw (1). The screw head (3) has at least one recess (5). The wrench (2) has a socket (32) and at least one recess (33). The recesses (5, 32) of the wrench (2) and the screw (1) being engageable with a movable plug (14) to prevent relative rotation between the socket (32) of the wrench (2) and the screw (1). This configuration inhibits theft of a screw (1) embedded in a surface with a countersunk borehole.

L'invention se rapporte à un procédé et à un appareil servant à fixer ensemble deux éléments au moyen d'une vis antivol (1) dont la surface supérieure (18) de la tête (3) est exempte de toutes entailles ou parties saillantes insérables, et d'une clé (2) pour entraîner la vis (1). La tête (3) de la vis présente au moins un évidement (5). La clé (2) est constituée d'une douille (32) et comporte au moins un évidement (33). Les évidements (5, 33) de la clé (2) et de la vis (1) sont prévus pour réceptionner une cheville amovible (14) qui empêche que s'effectue une rotation relative entre la douille (32) de la clé (2) et la vis (1). Cette configuration permet d'éviter le vol d'une vis (1) encastrée dans une surface comportant un trou fraisé.

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