Lock-out mechanism for empty/load changeover valve

B - Operations – Transporting – 60 – T

Patent

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Details

B60T 8/18 (2006.01)

Patent

CA 2119607

A lock-out assembly having a latching mechanism by which means a plunger may be manually depressed and latched in a lock-out position in which a lock pin is pre-set by engagement with an actuator rod of an empty/load valve or the like, so that in response to axial extension of the actuator rod sufficient to align a locking groove in the actuator rod with the lock pin, locking engagement therebetween will occur to limit further axial extension of the actuator rod, without any further action on the part of the operator. Automatic disengagement of the lock pin from the locking groove of the actuator rod occurs in response to axial retraction of the actuator rod, by effecting disengagement of the latching mechanism to allow a return spring to reset the plunger.

Ensemble de blocage comprenant un mécanisme de verrouillage au moyen duquel un piston peut être manuellement abaissé et bloqué dans une position de verrouillage. Une tige d'arrêt est pré-réglée par engagement avec une bielle vérin d'une soupape vide-chargée ou autre de sorte qu'en réponse à une extension axiale de la bielle vérin, suffisante pour aligner une rainure autofreinante dans cette bielle au moyen de la tige d'arrêt, un engagement d'arrêt survienne entre elles pour limiter davantage l'extension axiale de la bielle sans nécessiter d'autres mesures de la part de l'opérateur. Un désengagement automatique de la tige d'arrêt depuis la rainure autofreinante de la bielle vérin survient en réponse à la rétraction axiale de la bielle, en procédant au désengagement du mécanisme de verrouillage pour permettre à un ressort de rappel de réenclencher le piston.

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