Exit device systems and methods

Patent metadata

Field	Value
Publication number	US-11255109-B2
Application number	US-201815903683-A
Country	US
Kind code	B2
Filing date	Feb 23, 2018
Priority date	Feb 24, 2017
Publication date	Feb 22, 2022
Grant date	Feb 22, 2022

Abstract

An exit device according to one embodiment includes a plurality of sensors and an electronic dogging mechanism. The exit device is configured to locally analyze sensor data to determine the security state of the exit device, report data to a management system via a wireless communication channel established between the exit device and the management system, and receive and process instructions to perform an electronic dogging operation.

First claim

What is claimed is:

1. A method of operating an exit device comprising a pushbar, a drive assembly, and a dogging mechanism including a trigger and a movable member operable to engage the drive assembly, the method comprising:
establishing, by a control system of the exit device, a wireless communication connection between the exit device and a management system remote from the exit device;
receiving, by the control system of the exit device and via the wireless communication connection, an instruction from the management system to change a dogging state of the exit device by moving a dogging mechanism of the exit device to one of an undogged state or a dog-on-next-exit state; and
moving, by the control system of the exit device, the dogging mechanism to the one of the undogged state or the dog-on-next-exit state in response to the received instruction,
wherein, in response to the received instruction comprising an instruction to change the dogging state to the undogged state, the control system maintains the trigger in a first trigger position, thereby allowing free transition of the pushbar between a projected position and a depressed position for actuation of a latch mechanism;
wherein, in response to the received instruction comprising an instruction to change the dogging state to the dog-on-next-exit state, the control system moves the trigger to a second position to engage the movable member such that depression of the pushbar causes the movable member to retain the drive assembly in an actuated state, thereby maintaining the pushbar in the depressed position and dogging the exit device.

2. The method of claim 1 , wherein moving the dogging mechanism to the one of the undogged state or the dog-on-next-exit state in response to the instruction comprises transmitting an electrical signal to the dogging mechanism.

3. The method of claim 1 , further comprising transmitting, by the exit device and via the wireless communication connection, a notification of a change in the dogging state in response to moving the dogging mechanism to the one of the undogged state or the dog-on-next-exit state.

4. The method of claim 1 , further comprising:
determining, by the exit device, a security state of the exit device based on sensor data generated by a plurality of sensors of the exit device; and
providing, by the exit device, a notification of the security state in response to determining the security state.

5. The method of claim 4 , wherein determining the security state of the exit device comprises:
determining a door position status that indicates an open/closed position of a door;
determining a latchbolt status that indicates an actuated/deactuated state of the latch mechanism; and
determining a dogging status that indicates the dogging state.

6. The method of claim 5 , wherein a determination of the security state indicates that the door is secure in response to the door position status indicating that the door is in a closed position, the latchbolt status indicating that the latch mechanism is deactuated, and the dogging status indicating that the dogging mechanism is not in the dogged state.

7. The method of claim 6 , wherein determining the security state of the exit device further comprises determining whether a trim of the door has been tampered; and
wherein the determination of the security state indicates that the door is secure in response to the door position status indicating that the door is in the closed position, the latchbolt status indicating that the latch mechanism is deactuated, the dogging status indicating that the dogging mechanism is not in the dogged state, and that the trim of the door has not been tampered.

8. The method of claim 5 , wherein determining the security state of the exit device further comprises detecting an internal fault of the exit device.

9. The method of claim 4 , wherein providing the notification of the security state comprises wirelessly transmitting the notification to the management system.

10. The method of claim 4 , wherein providing the notification of the security state comprises displaying the notification on a visual indicator of the exit device.

11. An exit device, comprising:
a dogging mechanism having an undogged state, a dog-on-next-exit state, and a dogged state;
a control assembly that electromechanically controls operation of the dogging mechanism;
a pushbar having a projected position and a depressed position;
a wireless communication circuitry;
a processor; and
a memory comprising a plurality of instructions stored thereon that, in response to execution by the processor, causes the exit device to:
receive, via the wireless communication circuitry, an instruction from a management system to change a dogging state of the exit device by moving the dogging mechanism to one of the undogged state or the dog-on-next-exit state; and
transmit, in response to the instruction, one or more electrical signals to the control assembly to cause the dogging mechanism to move to the one of the undogged state or the dog-on-next-exit state;

wherein the dogging mechanism comprises:
a movable member having a first position correlated with the projected position of the pushbar and a second position correlated with the depressed position of the pushbar; and
a trigger operable to engage the movable member to selectively retain the movable member in the second position;

wherein, with the dogging mechanism in the undogged state, the trigger permits movement of the movable member between the first position and the second position, thereby permitting movement of the pushbar between the projected position and the depressed position;
wherein, with the dogging mechanism in the dogged state, the trigger retains the movable member in the second position, thereby retaining the pushbar in the depressed position; and
wherein, with the dogging mechanism in the dog-on-next-exit state, a next depression of the pushbar causes the dogging mechanism to transition to the dogged state.

12. The exit device of claim 11 , further comprising a plurality of sensors adapted to generate sensor data, wherein the plurality of instructions further causes the exit device to:
determine a security state of the exit device based on the sensor data; and
provide a notification of the security state in response to a determination of the security state.

13. The exit device of claim 12 , wherein the plurality of sensors comprises a door position sensor, a latchbolt sensor, and a dogging status sensor; and
wherein to determine the security state of the exit device comprises to:
determine a door position status that indicates whether a door is in one of a closed position or an open position based on sensor data generated by the door position sensor;
determine a latchbolt status that indicates whether a latch mechanism is in one of an actuated state or a deactuated state based on sensor data generated by the latchbolt sensor; and
determine a dogging status that indicates whether the dogging mechanism is positioned to hold the pushbar in the depressed position based on sensor data generated by the dogging status sensor.

14. The exit device of claim 13 , wherein a determination of the security state indicates that the door is secure in response to the door position status indicating that the door is in the closed position, the latchbolt status indicating that the latch mechanism is in the deactuated state, and the dogging status indicating that the dogging mechanism is not positioned to hold the pushbar in the depressed position.

15. The exit device of claim 12 , wherein to provide the

Assignees

• Schlage Lock Co Llc

Inventors

• Lacy Yong K
• Arlinghaus Paul R
• Pfunder Dan
• Ali Mohammed M
• Chandrasekhara Suresha
• Mani Vijayakumar

Classifications

• E05Y2400/44

  Sensors not directly associated with the wing movement · CPC title

• E05B2047/0089

  with electronic learning functions · CPC title

• E05B17/0083

  Sound emitting devices, e.g. loudspeakers · CPC title

• E05B17/22

  Means for operating or controlling lock or fastening device accessories, i.e. other than the fastening members, e.g. switches, indicators {(E05B39/00 - E05B45/00 take precedence)} · CPC title

• E05B65/108 Primary

  Electronically controlled emergency exits · CPC title