Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1992-09-29
1994-07-12
Stephan, Steven L.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
187103, 318284, B66B 1326
Patent
active
053290755
ABSTRACT:
An elevator door control apparatus includes at least one door safety device for detecting whether elevator doors are safe; an elevator control circuit for outputting a door-open/close command; and a door control circuit for controlling the opening/closing of doors on the basis of a door-open/close command issued from the elevator control circuit and for outputting a door reversal request to the elevator control circuit on the basis of the operation signal of the door safety device, wherein the door control circuit outputs a door reversal request to the elevator control circuit upon reception of the operation signal of the door safety device while the doors are being closed on the basis of a door-close command from the elevator control circuit, switches the door speed command pattern to a brake pattern from the door-close command speed pattern and thereafter switches the door speed command pattern from the brake pattern to the door-open command speed pattern when the door-open command is received from the elevator control circuit instead of the door-close command.
REFERENCES:
patent: 4300663 (1981-11-01), Hmelovsky et al.
patent: 4750591 (1988-06-01), Coste et al.
patent: 5137118 (1992-08-01), Iwata
Hirabayashi Terumi
Kodera Toshiyuki
Tawada Masanori
Mitsubishi Denki & Kabushiki Kaisha
Nappi Robert
Stephan Steven L.
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