MOBILE LOAD-LIFTING MACHINES

摘要

In a mobile load-lifting machine such as a wheeled crane in which the front and rear pairs of wheels are arranged for relative extension and retraction in accordance with the load-handling position of the machine or crane and in which at least one pair of wheels such as the front pair are inturnable for load-slewing movement of the machine, the provision of means for ensuring appropriate inturning of said pair of wheels according to the extended or retracted position of the front and rear wheels and which consists of a movable member linked to the pivotal mounting of the inturnable wheels and cooperating with a stop member which latter is adjustable in accordance with the wheel extension and retraction for permitting corresponding variation in the extent of movement of the movable member and hence of inturning movement of the inturnable pair of wheels.