Fasteners with multi-tiered recesses and drivers with...

F - Mech Eng,Light,Heat,Weapons – 16 – B

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

Patent

CA 2619782

A fastener (20a) includes a threaded shank (26a) connected to a head (28a) . A composite recess (30) is in the head, and the composite recess is open at the end of the head that is distant from the shank. The composite recess includes superimposed first and second recesses (32,34) that are each configured for being drivingly engaged by a tip of a driver. The length of the second recess (34) is greater than the length of the first recess (32) . The tip of the driver includes superimposed tiers that are for simultaneously drivingly engaging within the composite recess of the fastener. The superimposed tiers includes first and second tiers, and the length of the second tier can be greater than the length of the first tier.

La présente invention concerne un élément de fixation (20a) qui comprend une tige filetée (26a) connectée à une tête (28a). Une empreinte composite (30) est située dans la tête et l~empreinte composite est ouverte à l~extrémité de la tête qui est distante de la tige. L~empreinte composite comprend une première et une seconde empreintes superposées (32, 34) dont chacune est configurée pour être engagée par entraînement par une pointe de la vis. La longueur de la seconde empreinte (34) est supérieure à la longueur de la première empreinte (32). La pointe de la vis comporte des étages superposés qui sont prévus pour s~engager simultanément par entraînement à l~intérieur de l~empreinte composite de l~élément de fixation. Les étages superposés comprennent un premier et un second étage et la longueur du second étage peut être supérieure à la longueur du premier étage.

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