Screw comprising an integrated screwdriver

Details Screw comprising an integrated screwdriver Screw comprising an integrated screwdriver

F - Mech Eng,Light,Heat,Weapons

16

B

F16B 31/02 (2006.01) A61B 17/80 (2006.01) A61B 17/86 (2006.01) A61B 17/88 (2006.01) B25B 15/00 (2006.01) F16B 35/06 (2006.01) A61B 19/00 (2006.01)

Patent

CA 2515899

The inventive device consists of a screw (1) comprising an integrated screwdriver (2). The screw (1) has a screw shank (3) with a thread (4), a screw head (5) with a thread (8), and has a longitudinal axis (6). The screwdriver (2) is, via a predetermined breaking point (7), joined to the screw head (5) in a manner that is coaxial to the longitudinal axis (6). When tightening the screw, the integrated screwdriver is sheared off at the predetermined breaking point, whereby the shearing off torque is defined by the selected dimensions of the predetermined breaking point. The inventive screw comprising an integrated screwdriver permits even very small-dimensioned screws to be easily held and to be screwed into the plate boring (13) of a bone plate (12) while being guided well therein at a constant angle. The coaxial disposition of the integrated screwdriver and its fixed connection to the screw head enables the screw (1) to be received in any position around the longitudinal axis, and the position of the screwdriver does not need to be considered.

L'invention concerne un dispositif comprenant une vis (1) à tournevis (2) intégré. La vis (1) présente une tige (3) munie d'un filetage (4), une tête (5) munie d'un filet (8) et un axe longitudinal (6). Le tournevis (2) est relié à la tête de vis (5), de manière coaxiale à l'axe longitudinal (6), par l'intermédiaire d'un point de rupture théorique (7). Au moment où la vis est serrée à fond, le tournevis intégré est séparé au niveau du point de rupture théorique, le moment de la séparation étant déterminé par le dimensionnement sélectionné du point de rupture théorique. La vis selon l'invention, à tournevis intégré permet également de maintenir aisément des vis de très petites dimensions et de les visser dans l'alésage (13) d'une plaque vissée pour os (12), guidées correctement avec une stabilité angulaire. La disposition coaxiale du tournevis intégré et son assemblage fixe avec la tête de la vis permettent à la vis (1) d'être logée dans n'importe quelle position autour de l'axe longitudinal et il n'est pas nécessaire de tenir compte de la position du tournevis.

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