Emergency unlocking device at shaft doors of elevators

Details Emergency unlocking device at shaft doors of elevators Emergency unlocking device at shaft doors of elevators

2005-02-08

2005-02-08

Lillis, Eileen D. (Department: 3652)

Elevator, industrial lift truck, or stationary lift for vehicle

With barrier for regulating access to load support

Operation variable for emergency, maintenance, or abnormal...

C187S335000, C187S308000

Reexamination Certificate

active

06851521

ABSTRACT:
An emergency unlocking device includes an unlocking lever actuated by an unlocking slide that is guided in a guide fastened to the inner side of the shaft door. The guide covers a passage that is formed in the shaft door for insertion of a tool for actuation of the unlocking slide so that in the case of a fire the flame cannot pass through the passage to the elevator shaft.

REFERENCES:
patent: 2067242 (1937-01-01), Norton
patent: 4252218 (1981-02-01), Cowardin
patent: 4483420 (1984-11-01), Byrne
patent: 506155 (1992-09-01), None
patent: 0838 425 (1998-04-01), None
patent: 61238688 (1986-10-01), None
patent: 02158592 (1990-06-01), None
patent: 08067475 (1996-03-01), None
patent: WO 9532911 (1995-12-01), None

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