Electromagnetically operated elevator door lock

Details Electromagnetically operated elevator door lock Electromagnetically operated elevator door lock

2004-07-06

2010-11-02

Nguyen, John Q (Department: 3654)

Elevator, industrial lift truck, or stationary lift for vehicle

With barrier for regulating access to load support

Including slideably mounted barrier on load support

C187S331000, C187S333000, C070S276000, C292S251500

Reexamination Certificate

active

07823699

ABSTRACT:
An electromagnetic door lock assembly (30) includes a first portion (32) supported relative to hoistway doors (22) and a second portion (34) supported for movement with an elevator car (24). The first and second portions cooperate so that electromagnetic interaction between them unlocks a set of hoistway doors (22) for access to the car (24), for example. In disclosed embodiments, a first portion (32) of the actuator has at least one stationary electromagnetic portion (36A,36B) and at least one moveable portion (38). The second portion (34) that moves with the car (24) includes at least one stationary electromagnetic portion (44). Magnetic interaction between the first and second portions (32, 34) causes selected movement of the moveable portion (38) for selectively locking or unlocking the doors (22).

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Supplementary European Search Report for Application No. EP 04 75 6671 dated Apr. 6, 2010.

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