Integrated check pawl, last nail-retaining, and dry fire...

B - Operations – Transporting – 25 – C

Patent

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Details

B25C 1/00 (2006.01)

Patent

CA 2531760

A fastener-driving tool (10) includes an integrated function member (50) that performs at least two of the following three functions: a check pawl function, a last fastener-retaining function, and a dry fire lock-out function. In the disclosed embodiment, the integrated function member is provided as a lever- type structure that constitutes part of the access door assembly by means of which access is gained to the fastener drive track (31) along which fasteners (e.g., roofing nails) are fed to the driving portion of the tool. Also disclosed is an improved method of retaining the last nail in the drive track by a lateral head gripping action and a tool for performing the method.

La présente invention se rapporte à un outil de fixation d'attaches (10), qui comprend un élément à fonctions intégrées qui remplit au moins deux des trois fonctions suivantes : une fonction de cliquet d'arrêt, une fonction de retenue de la dernière attache, et une fonction de blocage de fonctionnement à vide. Dans le mode de réalisation proposé, l'élément à fonctions intégrées est doté d'une structure de type levier faisant partie intégrante de l'ensemble d'accès aux organes, qui permet d'accéder à la bande d'entraînement (31) des attaches, laquelle alimente en attaches (par ex., clous de toiture) la partie d'entraînement de l'outil. L'invention concerne également un procédé amélioré permettant de retenir le dernier clou dans la bande d'entraînement par une action latérale d'accrochage de la tête dudit clou, et un outil permettant la mise en oeuvre du procédé.

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