Travel/lift inhibit control

Details Travel/lift inhibit control Travel/lift inhibit control

1984-04-13

1986-07-08

Rolla, Joseph J.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

180271, B66B 920

Patent

active

045987971

ABSTRACT:
A lift truck of the order-picker type is provided with an automatic control system for safe-guarding the operation against certain conditions. The electronic control system is responsive to an electrical height signal corresponding to the height of the lift fork to regulate or limit the other operational functions of the truck. The speed control channel compares the speed signal with a speed command signal and produces a speed control signal of limiting value. A travel interrupt channel compares the height signal with the steering angle and interrupts the vehicle travel if the steering angle is excessive. Usually, the high speed lift is cut-off when a predetermined height is reached; the lowering of the upright is disabled at a predetermined lower limit subject to manual override.

REFERENCES:
patent: 2751994 (1956-06-01), Remde
patent: 3475061 (1969-10-01), Steinkamp et al.
patent: 3524522 (1970-08-01), Thomas et al.
patent: 3795285 (1974-03-01), Scholl et al.
patent: 3993166 (1976-11-01), Senour
patent: 4265337 (1981-05-01), Dammeyer

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