Door lock for an elevator car

Details Door lock for an elevator car Door lock for an elevator car

1988-07-15

1990-06-19

Huppert, Michael S.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187 49, 187 61, 49116, B66B 1300

Patent

active

049344889

ABSTRACT:
A door lock for an elevator car has a latch which is linked with a pivot arm which is pivotably mounted on the elevator car. The latch and the pivot arm can rotate together between a latched position, in which the doors are locked by the latch, and an unlatched position, in which the doors are released. The pivot arm is rotated from the latched to the unlatched position when it contacts any one of a plurality of cams which are installed on the wall of the elevator shaft in which the elevator car is housed. The cams are located such that when the pivot arm contacts a cam, the elevator car is in a position where it is safe to open the doors of the elevator car. The door lock may be further equipped with an electrically-controlled actuator which rotates the latch and the pivot arm to a second latched position in which the doors are locked by the latch and the pivot arm will not contact the cams.

REFERENCES:
patent: 1268109 (1918-06-01), Furlow
patent: 3912049 (1975-10-01), Holland et al.
patent: 4423799 (1984-01-01), Glaser et al.
patent: 4512443 (1985-04-01), Dewhurst

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