Pneumatic tappet adjustment tool

B - Operations – Transporting – 25 – B

Patent

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Details

B25B 23/10 (2006.01) B25B 13/48 (2006.01) B25B 23/142 (2006.01) F01L 1/20 (2006.01)

Patent

CA 2623849

A tool for adjusting the tappet clearance in the valve actuation system of an internal combustion engine includes a screw adjustment portion that is driven by a pneumatic powered screw driver. The pneumatic power to the screw driver is regulated to cause the screw driver to position the screw so that the desired biasing force is present. The screw driver bit passes through the head portion of a torque limiting wrench which is used to loosen and tighten the jam nut that secures the tappet adjustment screw. The tool also has a pneumatic driven gripping mechanism to hold the screw driver bit in position and prevent inadvertent displacement of the tappet adjustment screw while the jam nut is tightened.

Un outil permettant de régler le jeu du poussoir d'une soupape dans le système d'activation de la soupape d'un moteur à combustion interne comprend une partie de réglage de vis qui est enfoncée par un tournevis à alimentation pneumatique. L'énergie pneumatique du tournevis est régulée pour entraîner celui-ci à positionner la vis de façon que la force de sollicitation désirée soit présente. L'embout du tournevis traverse la partie tête d'une clé à limitation de couple qui est utilisée pour relâcher et resserrer le contre-écrou qui fixe la vis de réglage de la soupape. L'outil est aussi muni d'un mécanisme de préhension à alimentation pneumatique pour retenir l'embout de tournevis en position et empêcher un déplacement par inadvertance de la vis de réglage de la soupape pendant que le contre-écrou est resserré.

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