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.
Claims24
An upright for a lift truck, comprising:
- a first group of mast sections in a first stagger arrangement, a first mast section of said first group of mast sections being fixed to the lift truck;
- a second group of mast sections in a second stagger arrangement reverse nested inside said first stagger arrangement;
- and
- a drive system for telescopically extending and retracting said mast sections relative to said first mast section.
In a lift truck having (a) steerable and drive wheels for propelling and maneuvering said truck over a surface, (b) an upright and carriage system for handling loads and (c) a power source and drive system for propelling said truck and operating truck systems including said upright and carriage system, the improvement comprising:
- a five stage upright including first and second mast sections in a first stagger arrangement, said first mast section being fixed to the lift truck;
- third, fourth and fifth mast sections in a second stagger arrangement reverse nested inside said first stagger arrangement.
A method of manufacturing an upright with an improved load center and a reduced overall fore/aft dimension, comprising:
- providing a first group of mast sections in a first stagger arrangement;
- providing a second group of mast sections in a second stagger arrangement reverse nested inside said first stagger arrangement.
Dependencies are inferred from the claim text.