Patent ID: 11884522
Assignee: GROVE U.S. L.L.C.
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A mobile lift crane comprising:
a carbody including moveable ground engaging members;
a rotating bed rotatably connected to the carbody such that the rotating bed can swing with respect to the ground engaging members;
a boom pivotally mounted on a front portion of the rotating bed;
a first structure pivotally coupled to the rotating bed at a first end of the first structure;
a second structure pivotally coupled to the first structure at a second end of the first structure and at a first end of the second structure;
a moveable counterweight unit coupled to the second end of the second structure;
a means for moving the moveable counterweight unit away from the rotating bed during a pick, move, and set operation and for moving the moveable counterweight unit toward the rotating bed during a pick, move, and set operation such that the moveable counterweight unit moves a greater horizontal distance from the rotating bed than a displacement of the means for moving the moveable counterweight that causes the moveable counterweight unit to move; and,
wherein the crane is configured such that the moveable counterweight unit is never supported by the ground other than indirectly by the moveable ground engaging members on the carbody throughout all pick, move, and set operations.