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US 8,833,523 B2Granted
Upright for a lift truck
AssigneeClark Material Handling Company
InventorClark C. Simpson
Life of this patent
Estimating the term…
Abstract
An upright for a lift truck includes a first group of mast sections in a first stagger arrangement where a first mast section of the first group of mast sections is fixed to the lift truck. The upright further includes a second group of mast sections in a second stagger arrangement that is reverse nested inside the first stagger arrangement. Further, the upright includes a drive system for telescopingly extending and retracting the second mast sections relative to the first mast section.
Claims7
An upright for a lift truck, comprising:
- a first, outer mast section fixed to the lift truck;
- a second mast section nested within said first mast section;
- a third mast section nested within said second mast section;
- a fourth mast section nested within said third mast section;
- a fifth mast section nested within said fourth mast section;
- a carriage assembly mounted for translational movement along said fifth mast section;
- a drive system for telescopingly extending and retracting said second, third, fourth and fifth mast sections relative to said first mast section;
- wherein said first mast section provides a first lift stage, said second mast section provides a second lift stage, said third mast section provides a third lift stage, said fourth mast section provides a fourth lift stage, said fifth mast section provides a fifth lift stage with each lift stage comprising only a single mast section so as to reduce weight of said upright and increase lift capacity.
5 more elements
Dependencies are inferred from the claim text.