Releasable hoistway door safety interlock

Details Releasable hoistway door safety interlock Releasable hoistway door safety interlock

1981-10-29

1984-09-04

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

49141, 70465, B66B 1300

Patent

active

044692005

ABSTRACT:
To prevent passengers in an elevator from opening the hoistway door when the car is well above the floor, a rotatable arm is located below the car and engages the hall door to prevent it from being opened. This arm may be reached from the floor, by opening the hoistway doors slightly, and rotated to disengage it from the door, which may then be fully opened.

REFERENCES:
patent: 885924 (1908-04-01), Hollinger
patent: 1838524 (1931-12-01), Brown

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