Sextuple upright

Details Sextuple upright Sextuple upright

1993-02-19

1994-06-14

Olszewski, Robert P.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187 95, 414910, 414911, B66B 920

Patent

active

053201973

ABSTRACT:
An upright, particularly for a counterbalanced, high lift truck, comprising first and second telescoping dual mast sections disposed in fore and aft relationship, each section having laterally spaced outer, intermediate, and inner rails, and a load carriage elevatable on the inner rails of the front mast section providing a five-stage, sextuple upright. The carriage has side thrust and vertical guide roller pairs travelling in anti-friction engagement on the inner rails spaced to distribute the forces for reducing roller wear and rail distortion. The carriage has a free lift that leaves the top of the carriage flush with the top of the upright reducing the possibility of ceiling damage. The carriage also does not extend laterally beyond the sides of the mast section to reduce interfering with objects alongside the lift, such as storage racks, when engaging a load. The rails and carriage overlap to a high degree thereby allowing loads to be lifted by a truck having a smaller capacity.

REFERENCES:
patent: 3414086 (1968-12-01), Ulinski
patent: 3705658 (1972-12-01), Harris
patent: 3841442 (1974-10-01), Erickson et al.
patent: 3851732 (1974-12-01), Wagner et al.
patent: 4261438 (1981-04-01), Olson
patent: 4279567 (1981-07-01), Thompson
patent: 4430040 (1984-02-01), Halmos
patent: 4432438 (1984-02-01), Robinson, Jr.
patent: 4721187 (1988-01-01), Riddle
patent: 4765441 (1988-08-01), David et al.
patent: 4896748 (1990-03-01), Mikkelsen et al.
Clark Corp., Industrial Truck Division "Clark 500 Series," Apr. 25, 1984.

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