Control systems for the lifting moment of vehicle mounted booms

Details Control systems for the lifting moment of vehicle mounted booms Control systems for the lifting moment of vehicle mounted booms

1994-10-26

1996-07-23

Merritt, Karen B.

Traversing hoists

Having random condition sensor combined with an indicator or...

Means determining overloading produced by load

212270, B66C 1342

Patent

active

055381499

ABSTRACT:
In a vehicle mounted digger derrick or crane, the moment applied to the boom by a lift cylinder is controlled in a customized manner to more fully utilize the structural strength of the machine at different working positions of the boom. In one embodiment, the moment is controlled by controlling the moment arm through a pivot link which carries the base end of the lift cylinder and which is pivoted by an auxiliary cylinder. In another embodiment, the force component of the moment is controlled in response to changes in the boom angle or moment sensed by a linear position transducer or other sensor.

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