B - Operations – Transporting – 66 – C
Patent
B - Operations, Transporting
66
C
214/23, 212/41.1
B66C 23/72 (2006.01) B66C 23/76 (2006.01)
Patent
CA 1316148
ABSTRACT OF THE DISCLOSURE A crane and an attachment comprising a counterweight support beam including a plurality of connected seg- ments movable relative to each other, and having a fore end adapted to be connected to the crane upper works, and an aft end rearward from the rear portion of the upper works. The attachment also includes a moveable counterweight carrier adapted to carry a counterweight when the counterweight is supported thereon. The car- rier is mounted on the support beam for movement along the length thereof. The attachment also includes a cylinder for selectively moving the counterweight car- rier fore and aft along the beam, landing gear for nor- mally supporting the aft end of the beam on the ground, and a backhitch pendant and a pendant cylinder inter- connecting the aft end of the beam and the top of the mast for raising the landing gear from the ground in- cident to lifting a heavy load from the boom. The sup- port beam is extendable by moving the connected seg- ments relative to each other between a first position, wherein the aft end is spaced from the rear portion of the crane upper works, and a second position, wherein the aft end is spaced further from the rear portion of the crane upper works.
612289
Becker Thomas K.
Casavant Terry S.
Helm P. Ralph
Petzold Terry L.
Wanek Michael J.
Cassan Maclean
Manitowoc Company Inc. (the)
LandOfFree
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