US 2017/0292294 A1 · ELECTRIFIED EXIT DEVICE

Abstract

A latch dogging assembly comprises an electromagnet and an actuator mounted on a bracket. A guide slide is pivotally mounted on the bracket with a lead block coupled to the guide slide. A guide pin rides along an inner surface of the bracket causing the guide slide to pivot. A pawl is slidably engaged with the guide slide. A guide link includes a post. An armature is mounted to the panic bar and the post engages the pawl. When the actuator is energized to move the lead block, the pawl engages the post to pivot the armature and thereby cause the panic bar to move from the extended position to the depressed position. When the electromagnet is energized the armature is magnetically held preventing reverse pivoting of the guide link. A method for fully retracting a door latch is also provided.

Claims16

Dependent claims

A latch dogging assembly configured to be operable within an exit device, the exit device releasably securing a door in a door frame, the exit device including a panic bar, an actuating member operatively connected to said panic bar, an exit bar operatively connected to said actuating member and a latch operatively connected to said exit bar wherein said exit bar is movable by movement of said panic bar between an extended position and a depressed position of said panic bar so as to move said latch between a latched position when said panic bar is in an extended position and an unlatched position when said panic bar is in a depressed position, said modular latch dogging assembly comprising:

a bracket for securing said modular latch dogging assembly to said exit device;
a dogging bar mount connectable to said panic bar;
and
an actionable electric actuator secured to said bracket and configured to act upon said dogging bar mount to move said panic bar to its depressed position, wherein, upon movement of said panic bar to its depressed position by said dogging bar mount when said electric actuator is actuated, said latch is moved to its said unlatched position.

1 more element

A latch dogging assembly configured to be operable within a door latch system, the door latch system releasably securing a door in a door frame, the door latch system being selectively moveable by way of a panic bar from a latched position when the panic bar is in an extended position and the door is secured in the door frame, to an unlatched position when the panic bar is in a depressed position, whereby the door is releasable from the door frame, the latch dogging assembly comprising:

a) an electromagnet;
b) an actionable electric actuator mounted on a bracket and configured to impart linear movement on a shaft when the actuator is actuated;
c) a pawl operatively connected to said shaft whereby activation of the actuator to move the shaft in a first direction drives the pawl to a loaded position;
d) a guide link pivotally mounted to the bracket;
and
f) an armature connected to a dogging bar mount wherein said dogging bar mount is connected to the panic bar and said guide link is configured to engage the pawl when the pawl is in the loaded position,
whereby when the actuator is activated to move the shaft in a second direction opposite the first direction, the pawl engages the guide link to move the dogging bar mount and thereby causes the panic bar to move from the extended position to the depressed position, the armature to engage the electromagnet and the door latch system to move from the latched position to the unlatched position,
wherein when the electromagnet is energized the armature is magnetically held by the electromagnet such that the panic bar remains in the depressed position and the door latch system remains in the unlatched position.

5 more elements

Dependencies are inferred from the claim text.

Electrified exit device

Life of this patent

Electrified exit device

Life of this patent

Abstract

Claims16