Elevator car door lock

Details Elevator car door lock Elevator car door lock

1990-10-31

1992-08-18

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 61, 49116, B66B 1300

Patent

active

051391120

ABSTRACT:
An elevator door system utilizes a cam to unlatch hoistway doors. The cam is required by code to have a greater swing motion than is required to unlock the hoistway doors. A mechanism follows the motion of the cam and locks the car doors when the cam is beyond the swing motion required to actuate a hoistway door lock. If the cam operates within the normal swing motion, it is in contact with a hoistway door lock. If the retiring cam is not in contact with the hoistway door lock, the car must not be a safe exiting zone and the car door is locked by the mechanism.

REFERENCES:
patent: 4364454 (1982-12-01), Glaser et al.
patent: 4926974 (1990-05-01), Inventio
patent: 4926976 (1990-05-01), Inventio
patent: 4934488 (1990-06-01), Mitsubishi

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