Patent ID: 9695015
Date: 2017-07-04
CPC Classifications: B66B

Claim:
1. To be installed on an elevator having a door and structured to travel within a shaft between multiple floor openings, an elevator door safety lock system, comprising: a vertical position sensor structured to identify alignment of the elevator door with each of the multiple floor openings, said vertical position sensor comprising an RFID reader disposed on the elevator and movable therewith and a plurality of RFID tags, each disposed in the shaft in corresponding relation to different ones of the floor openings, said RFID reader structured to detect whether any one of said RFID tags is disposed within a predetermined proximity thereof, thereto enabling said vertical position sensor to recognize alignment achieved instantaneously when said RFID reader is within said predetermined proximity of one of said RFID tags and determine said elevator door is aligned with one of said floor openings when alignment achieved is recognized; a door lock structured to maintain the door securely locked when the elevator door is not aligned with one of the floor openings; said door lock including a socket and a latch pin, said latch pin structured to move between an engaged orientation and a disengaged orientation relative to said socket, said door lock operatively associated with the elevator door so as to maintain the elevator door in a closed position when said latch pin is in said engaged orientation; said door lock further including an engager having a first state and a second state, said first state structured to maintain said latch pin in said engaged orientation and said second state structured to maintain said latch pin in said disengaged orientation, said engager structured to change engagement states, defined as a change from said first state to said second state or from said second state to said first state, only upon receipt of an input; said engager structured to change engagement states through a provision of one or more microbursts of electricity; said vertical position sensor structured to cause said input to be communicated to said engager upon determining said elevator door is aligned with one of said floor openings and upon said RFID reader moving from a position where said elevator door was aligned with one of said floor openings to a position where alignment achieved is not recognized, such that said engager is in said first state when alignment achieved is not recognized and in said second state when said elevator door is aligned with one of said floor openings; a release capability structured to permit selectable manual release of said door lock; and a visual indicator structured to indicate when one of said RFID tag is within said predetermined proximity of said RFID reader.