A logging grapple

Details A logging grapple A logging grapple

B - Operations, Transporting

66

C

B66C 1/58 (2006.01)

Patent

CA 2155450

A grapple comprising a grapple head to which is pivotally mounted left and right tongs. Two double acting hydraulic cylinders extend between the tong pivot points and the other tong. The piston side of the hydraulic cylinders are hydraulically coupled together by a closed center flow divider valve. A cross over relief valve assembly is mounted in parallel with the flow divider valve.

Grappin comprenant une tête sur laquelle sont montées des pinces pivotantes à droite et à gauche. Deux vérins hydrauliques à double effet se prolongent entre les points de pivot de chaque pince. Les côtés pistons des vérins hydrauliques sont hydrauliquement couplés par une soupape distributrice centrale fermée. Une soupape de décharge transversale est montée en parallèle avec la soupape de distribution.

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