Nut for accommodating the head of a fastening element or for...

B - Operations – Transporting – 25 – B

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B25B 13/44 (2006.01) B23B 31/20 (2006.01) B25B 23/10 (2006.01)

Patent

CA 2271836

A nut (6) is inserted into a screw attachment (1), said nut accommodating the head of a fastening element. The nut (6) is made of two cheeks (4, 5) which engage into a sleeve-like holder (3) with torsional rigidity. The cheeks can be moved in axial direction in relation to the holder (3). In one of the end positions, the cheeks (4, 5) can be pressed apart for insertion of the head of a fastening element. By exerting an axial force in the direction of the arrow (23), the cheeks (4, 5) are pressed into the holder (3), whereby the cheeks are forced against each other in a radial direction as a result of their sharp corner contact surfaces (12, 13), so that the inserted head of a fastening element is firmly retained.

Une douille de clef (6) dans laquelle est logée une tête d'élément de fixation est introduite dans une pièce saillante de vissage (1). La douille de clef (6) comprend deux mâchoires (4, 5) contenues bloquées en rotation dans un support (3) sous forme de manchon. Les mâchoires sont déplaçables par rapport au support (3) dans le sens axial. Dans une de leurs positions terminales, les mâchoires (4, 5) peuvent être séparées par éjection dans le sens radial pour introduire une tête d'élément de fixation. Les mâchoires (4, 5) sont introduites dans le support (3), par poussée axiale exercée dans le sens de la flèche (23). Comme les surfaces de contact (12, 13) s'étendent de manière acutangulaire, les mâchoires se trouvent comprimées de manière forcée l'une contre l'autre dans le sens radial, de manière que la tête d'élément de fixation introduite soit bloquée.

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