Combination of screw and driver bit or wrench

Details Combination of screw and driver bit or wrench Combination of screw and driver bit or wrench

F - Mech Eng,Light,Heat,Weapons

16

B

F16B 23/00 (2006.01) B25B 15/00 (2006.01) B25B 23/10 (2006.01)

Patent

CA 2313481

A screw with a polygonal hole (30) formed with a polygonal hole (32) disposed in the center of a screw head (30a) and comprising a vertical wall (33) with a preset depth, and with a cone bast oriented from the lower edge of the vertical wall toward the center of a screw neck, wherein a vertical step forming an inscribed circle of the polygon is provided at the lower edge (33a) of the vertical wall (33) of the polygonal hole (32) formed in the screw head (30a), the cone base (35) oriented from the lower edge (34a) of the vertical step (34) toward the center of the screw neck is formed, and a driver bit (40) or wrench (41) to be fitted to this screw is provided at the tip of a peak edge (42) with a cylindrical projection (44) forming the inscribed circle of the polygon.

Cette invention se rapporte à une vis, qui comprend une partie polygonale (30) dans laquelle est ménagé un trou polygonal (32) au centre de la tête (30a) de la vis et comportant une paroi verticale (33) ayant une profondeur préétablie, ainsi qu'une base conique orientée depuis le bord inférieur de la paroi verticale en direction du centre de la tige de la vis. Un décrochement vertical formant un cercle inscrit du polygone est prévu au niveau du bord inférieur (33a) de la paroi verticale (33) du trou polygonal (32) ménagé dans la tête (30a) de la vis, la base conique (35) est conçue de façon à être orientée depuis le bord inférieur (34a) du décrochement vertical (34) en direction du centre de la tige de la vis, et une lame de tournevis (40) ou une clé (41) adaptée à cette vis comporte à l'extrémité d'un bord de crête (42) une protubérance cylindrique (44) formant le cercle inscrit du polygone.

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