Elevator door unit having mechanism to release lock unit...

Details Elevator door unit having mechanism to release lock unit... Elevator door unit having mechanism to release lock unit...

2007-07-17

2007-07-17

Salata, Jonathan (Department: 2837)

Elevator, industrial lift truck, or stationary lift for vehicle

With barrier for regulating access to load support

Includes motor or motor driven linkage for shifting barrier

C187S313000

Reexamination Certificate

active

10775233

ABSTRACT:
An elevator door unit includes cage doors, a cage door lock unit, hall doors, and a lock release unit. The cage doors are provided in a cage which moves in a shaft. The cage door lock unit limits and locks the opening width of the cage doors to the width not to permit passing of passengers. The hall doors are provided in a landing hall, and opened interlocking with the cage doors, when the cage stops in a range of facing to the cage doors. The lock release unit releases the cage door lock unit within the opening width by opening the cage doors by manual operation, when the cage stops in a range that the cage doors face to the hall doors.

REFERENCES:
patent: 3878919 (1975-04-01), Dewhurst
patent: 4357998 (1982-11-01), Gibson et al.
patent: 4469200 (1984-09-01), Young et al.
patent: 4529065 (1985-07-01), Kraft
patent: 4926975 (1990-05-01), Morris
patent: 1129668 (1996-08-01), None

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