Elevator – industrial lift truck – or stationary lift for vehicle – With barrier for regulating access to load support – Operation variable for emergency – maintenance – or abnormal...
Patent
1996-06-28
1998-10-13
Noland, Kenneth
Elevator, industrial lift truck, or stationary lift for vehicle
With barrier for regulating access to load support
Operation variable for emergency, maintenance, or abnormal...
187335, B66B 1314
Patent
active
058198776
ABSTRACT:
A simplified elevator car door lock assembly locks an elevator car door if the car is outside a landing zone and there is an attempt to open those doors. The car doors are connected to the hoistway doors by a pair of vanes mounted on the car door and a pair of rollers mounted on the hoistway door. A third vane is attached to the car door and follows a cam path on the car door to lock the car doors if the car is not in a landing zone. Conversely, the third vane senses if the car is in a landing zone and does not lock the car door if it is moved.
REFERENCES:
patent: 4313525 (1982-02-01), McDonald
patent: 4491200 (1985-01-01), Thompson et al.
patent: 4947964 (1990-08-01), Husmann
Cohen Blair J.
Kulak Richard E.
Rivera James A.
Sheynkman Valery G.
Stupienski Duane R.
Noland Kenneth
Otis Elevator Company
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