Manitowoc Crane Companies, Inc.

Manitowoc Cranes, LLC

Manitowoc Crane Group, LLC

Joseph R Rucinski

David J Pech

Joel David Zick

Timothy James Albinger

Derrick L Geiser

Bronson E Foust

Charles E Wernecke

Ian M Moore

Ryan Matthew Fickau

William J O'Neil

Brian Nicholas Nysse

Jonathan Michael Borlee

John William Taylor

Brandon D Resch

Ingo Noeske

David A Robertson

Ryan M Fickau

A lift crane includes a carbody; a rotating bed comprising a counterweight support frame; a boom; a counterweight unit supported on the counterweight support frame in a moveable relationship with respect to the counterweight support frame; and a counterweight unit movement device connected between the rotating bed and the counterweight unit to move the counterweight unit toward and away from the boom. The crane is configured such that during crane operation, the moment generated by the counterweight unit acts on the rotating bed predominantly through the counterweight support frame. Alternatively, the crane can include a mast. In some embodiments the same basic crane is configured to be set-up with two different counterweight options, i) a counterweight unit directly supported on the counterweight support frame and ii) a counterweight support beam moveably connected to the remainder of the rotating bed and a counterweight unit supported on the counterweight support beam.

Lift crane with moveable counterweight

A lift crane includes a carbody and movable ground engaging members mounted on the carbody. A rotating bed is rotatably connected to the carbody and includes a counterweight support frame including a rack coupled directly to a lower surface of the rotating bed. A boom is pivotally mounted to the rotating bed. A counterweight unit includes a trolley, the counterweight unit being in a movable relationship with respect to the rotating bed. A counterweight unit movement device is configured to move the counterweight unit toward and away from the boom. Other embodiments include a counterweight support beam movably connected to the rotating bed, the counterweight support beam including another rack coupled to a lower surface of the counterweight support beam. A counterweight support beam movement device is connected between the counterweight support beam and the counterweight support frame.

Lift crane with improved movable counterweight

A lift crane includes a carbody; moveable ground engaging members; a rotating bed rotatably connected to the carbody; and a boom pivotally mounted on the rotating bed. The crane is configured for assembly in at least two configurations. In the first configuration, the crane further includes a live mast; a first counterweight support frame; and a first movable counterweight unit moveably connected to and supported by the first counterweight support frame. In the second configuration, the crane further includes a lattice mast; a second counterweight support frame; a moveable counterweight support beam coupled to the second counterweight support frame and operable to move relative to the second counterweight support frame; and a second moveable counterweight unit moveably connected to the moveable counterweight support beam.

An intermediate suspension connection column segment designed for use in constructing a column which is supported by a suspension that includes a first end having a first connection configured to connect to a first adjacent column segment; a second end opposite the first end, the second end having a second connection configured to connect to a second adjacent column segment; and an intermediate suspension connection between the first connection and the second connection, the intermediate suspension connection configured to couple an intermediate suspension between the suspension and the column.

System and method for connecting a crane suspension assembly to a support column

A lift crane includes a carbody and movable ground engaging members mounted on the carbody. A rotating bed is rotatably connected to the carbody and includes a counterweight support frame including a rack coupled directly to a lower surface of the rotating bed. A boom is pivotally mounted to the rotating bed. A counterweight unit movement device is configured to move the counterweight unit toward and away from the boom. At least one auxiliary member includes a counterweight pad that is configured to not touch the ground during a pick, move, and set operation. A linear actuator is configured to adjust a distance that the counterweight pad is above the ground.

Height adjustment mechanism for an auxiliary member on a crane

A lift crane includes a carbody; ground engaging members elevating the carbody off the ground; a rotating bed rotatably connected to the carbody; a boom pivotally mounted at a first end to the rotating bed with a load hoist line extending adjacent a second end of the boom; a boom hoist mechanism that can be used to change the angle of the boom relative to the rotating bed during crane operation; and a boom raising assist structure connected to the boom. The boom raising assist structure preferably includes at least one ground engaging member in contact with the ground; and a boom elevating member extending between the assist structure ground engaging member and the boom. The boom elevating member supports at least a part of the weight of the boom.

Crane with boom raising assist structure

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Manitowoc, WI, United States of America

Joseph R Rucinski