US 4,801,163 A · Exit device actuator and dogger

Abstract

An electrically operated exit device comprises a low powered dogging assembly for a pushbar and an electrical actuator for a latch bolt. A latching bracket is attached to the pushbar for movement inwardly and outwardly along a path. A dogging plate of the dogging element is pivotally moveable between a retracted position out of the path of the latching element and an extended position in the path of the latching element. The dogging plate is spring biased toward the extended position and has a protruding shoulder. When the dogging plate is extended and the pushbar moved inward manually, the latching bracket strikes the dogging plate, retracts it slightly against the force of the spring bias and then continues slightly beyond the shoulder of the dogging plate. Then, the doggin plate again extends fully under the influence of the spring bias such that a bearing surface on the far side of the shoulder catches the latching bracket and thereby dogs the pushbar. The electric latch bolt actuator is coupled to a deadbolt by a first linkage assembly and to the latch bolt by the second linkage assembly and simultaneously manipulates the deadbolt and latch bolt to free the door.

Claims9

Dependent claims

In an exit device having a latch bolt, a pushbar mechanically coupled to retract the latch bolt and supported for movement from a normal, outward position to an inward position where it operates said latch bolt, and biasing means for biasing the pushbar toward its outward position, the improvement comprising:

a latching element connected to the pushbar for movement inwardly and outwardly therewith along a path,
a dogging element movable between a retracted position out of said path of said latching element and an extended position into said path of said latching element for retaining said latching element when said latching element is moved inwardly, and actuating means including an electrically operated latching solenoid selectively connected to a source of electrical power for moving said dogging element between its retracted and extended position, said latching solenoid having a plunger connected to said dogging element and including mechanical biasing means for extending said plunger from said retracted position, said solenoid being selectively connected to said source of electrical power for retracting said plunger from said extended position and for releasing said plunger from said retracted position to enable said biasing means to extend said plunger wherein said electrical power is not required to maintain said plunger in said retracted position.

latching means connected to the pushbar and movable along a path as said pushbar moves inwardly and outwardly, dogging means movable between a retracted position out of said path of said latching means and an extended position into said path of said latching means for catching said latching means when said latching means is moved inwardly, and
actuating means including an electrically operated latching solenoid selectively connected to a source of electrical power for moving said dogging means between its retracted and extended positions, said latching solenoid having a plunger connected to said dogging means and including mechanical biasing means for extending said plunger from said retracted position, said solenoid being selectively connected to said source of electrical power for retracting said plunger from said extended position and for releasing said plunger from said retracted position to enable said biasing means to extend said plunger wherein said electrical power is not required to maintain said plunger in said retracted position

Dependencies are inferred from the claim text.

Exit device actuator and dogger

Life of this patent

Exit device actuator and dogger

Life of this patent

Abstract

Claims9