Lifting system control device

Details Lifting system control device Lifting system control device

1979-12-03

1981-02-24

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Means maintaining platform level on angularly movable support

Swingable support

182 19, B66F 1104

Patent

active

042522137

ABSTRACT:
A device for controlling a lifting system, for example a so-called sky-lift, a building construction machine or the like, where the lifting system comprises at least one articulated arm (5,10,11), a working unit (15) such as a loading platform, hydraulic cylinders (6,12,13,16) intended to act on the same (5,10,11,15), necessary valves for said cylinders (6,12,13,16) and means for controlling said valves.
The invention is characterized in that it comprises position sensing members (17,18) capable to deliver to a control unit (19) actual values, which geometrically determine the lifting system, annd a control panel (20) capable to deliver nominal values to said control unit (19).
The control unit (19) is capable to compare actual values with nominal values and to act on adjusting means (22) for said valves so as to cause said working unit (15) to carry out a predetermined movement.
According to a preferred embodiment, the control unit (19) is a so-called programmable micro-computer, which is programmed and arranged in a suitable way.

REFERENCES:
patent: 4160492 (1979-07-01), Johnston
patent: 4187927 (1980-02-01), Byrne

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