Patent ID: 9688515
Date: 2017-06-27
CPC Classifications: B66B

Claim:
1. An elevator car door interlock, comprising: a. an elongated shaft, b. a cable, having first end mounted to an elevator car that includes a car door and second end mounted to a weighted member, said weighted member includes a pin, said cable is pulled upwards when a user opens the car door of said elevator car a distance substantially equivalent to the distance that said car door is opened, c. means for mounting said shaft to said elevator car, d. a locking mechanism having a hook, e. said locking mechanism includes a spring having first end mounted to said shaft and having second end mounted to said hook, said hook is biased upwards by said spring, said hook is pushed down by said pin with sufficient force to overcome the bias of said spring, f. an elongated arm mounted to said hook having a flag engagement member at its distal end that engages a flag along an unlocking area of a hoistway, whereby when the user attempts to open said car door, said cable will rise allowing said bias of said spring to pull said hook upwards and engage said pin, preventing said car door from opening further.