0383087-A1 is referenced by 2 patents and cites 4 patents.

An elevator car having a clutch carried by a car door for engaging drive rollers of an adjacent hatch door via "open" and "close" vanes of the clutch. A door operator mounted on the car includes a door drive arm which is linked to the car door via a door crank arm. A door lock carried by the door clutch prevents normal operation of the door crank arm, unless the open vane of the door clutch contacts a hatch door drive roller. Thus, unless the car is in a floor landing zone, the car door cannot be opened by a passenger inside the car.

Title
Lift car with a modified door lock.
Application Number
EP19900101742 19900129
Publication Number
0383087 (A1)
Application Date
January 29, 1990
Publication Date
August 22, 1990
Inventor
Morris Arnold Michael
Assignee
Inventio
CH
IPC
B66B 13/16
B66B 13/12
B66B 13/14
B66B 13/02
B66B 13/18
B66B 13/12
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