Patent ID: 7614843

Claim:
A machine, comprising: a chassis; a boom assembly mounted on the chassis, the boom assembly being movable relative to the chassis; and a grapple assembly suspended from the boom assembly, the grapple assembly including a grapple head fluidly connected to a hydraulic pump along a first hydraulic circuit for actuating the grapple head to a grasping configuration, the grapple assembly further including a hydraulic motor fluidly connected to the hydraulic pump along a second hydraulic circuit for rotating the grapple head using a shaft; the second hydraulic circuit including a bypass valve having a first position configured to block a fluid flow between a first port of the hydraulic motor and a second port of the hydraulic motor, and a second position configured to allow a fluid flow between the first port of the hydraulic motor and the second port of the hydraulic motor, wherein the bypass valve is movable in response to a pressure level within the first hydraulic circuit.