04926975 is referenced by 14 patents and cites 18 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
Elevator car with improved door lock
Application Number
7/309630
Publication Number
4926975
Application Date
February 13, 1989
Publication Date
May 22, 1990
Inventor
Arnold M Morris
Chester Township, Morris County
NJ, US
Agent
D R Lackey
Assignee
Inventio
CH
IPC
B66B 13/00
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