Fire door lock mechanism

Details Fire door lock mechanism Fire door lock mechanism

2006-05-16

2006-05-16

Estremsky, Gary (Department: 3676)

Closure fasteners

Bolts

Emergency operating means

C292SDIG065

Reexamination Certificate

active

07044510

ABSTRACT:
A fire door lock mechanism is provided, allowing a user to directly push and press a handlebar forwards to activate a lock bolt and open a fire door mounted with the lock mechanism in a comfortable manner. A first opening unit of the lock mechanism is located inside the fire door to operate the lock bolt. The handlebar is located in a second opening unit of the lock mechanism on the fire door. The handlebar, being pressed, activates a link arm connected thereto and accordingly induces a swing arm coupled to the link arm to generate a swing motion, so as to allow a pulley formed at one end of the swing arm to extend into the first opening unit and drive a lock bolt mount connected to the lock bolt to move horizontally, thereby making the lock bolt retract to release the lock mechanism.

REFERENCES:
patent: 4796931 (1989-01-01), Heid
patent: 4961330 (1990-10-01), Evans
patent: 5169185 (1992-12-01), Slaybaugh et al.
patent: 5322332 (1994-06-01), Toledo et al.
patent: 5490697 (1996-02-01), Surko, Jr.
patent: 5947534 (1999-09-01), Zarzycki, Jr.
patent: 5988708 (1999-11-01), Frolov et al.
patent: 6189939 (2001-02-01), Zehrung

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