Fire door lock mechanism

Details Fire door lock mechanism Fire door lock mechanism

2005-02-15

2005-02-15

Estremsky, Gary (Department: 3676)

Closure fasteners

Bolts

Emergency operating means

C292SDIG006

Reexamination Certificate

active

06854773

ABSTRACT:
A fire door lock mechanism is provided. A handlebar is coupled to one end of an actuator whose the other end is connected with a push rod. A lock bolt is rotatably mounted in a lock cover mount which accommodates a glide mount used to drive the push rod to move horizontally. When the actuator receives a depression force from the handlebar, the actuator is driven to rotate and induces the push rod to move horizontally. By the movement from the push rod, the lock bolt is driven to rotate to engage or disengage the lock mechanism. A partition and a fire piece are coupled to the glide mount. The fire piece melts at a high temperature during a fire, making the partition moved by a force from an elastic member connected thereto and cause the lock bolt to be engaged with the partition and maintained in a locked state.

REFERENCES:
patent: 4709950 (1987-12-01), Zortman
patent: 4875722 (1989-10-01), Miller et al.
patent: 5011199 (1991-04-01), Lowe et al.
patent: 5169185 (1992-12-01), Slaybaugh et al.
patent: 5340171 (1994-08-01), Slaybuagh et al.
patent: 5464259 (1995-11-01), Cohrs et al.
patent: 6145897 (2000-11-01), Locher
patent: 6189939 (2001-02-01), Zehrung

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