Lockout/tagout device with non-volatile memory and related system

• US 10,460,544 B2
• Filed: 07/02/2015
• Issued: 10/29/2019
• Est. Priority Date: 07/03/2014
• Status: Active Grant

• Current Assignee: Brady Worldwide Incorporated (Brady Corporation)
• Original Assignee: Brady Worldwide Incorporated (Brady Corporation)
• Inventors: Retzlaff, Gregory S., Campbell, Thomas, Stankowski, Thaddeus C., Anwar, Sohail, Cisek, Edward T.
• Primary Examiner(s): Gudorf, Laura A
• Application Number:
  US15/323,214
• Publication Number:
  US 20170140596A1
• Time in Patent Office: 1,580 Days
• CPC Class Codes: F16P 3/08 in connection with the locking of doors, covers, guards, or like members giving access to moving machine parts
• CPC Class Codes: G06K 19/0723 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
• CPC Class Codes: G07C 1/32 Time-recording locks
• CPC Class Codes: G07C 9/00309 operated with bidirectional data transmission between data carrier and locks
• CPC Class Codes: G07C 9/00896 specially adapted for particular uses

Abstract

A lockout/tagout or smart isolation device includes a wireless link, a non-volatile memory, and a controller in communication with the wireless link and the non-volatile memory. The wireless link is in selective communication with a wireless identification device, such as a keycard, carried by a user. The controller is programmed to receive a signal from the wireless link and write usage information about the device to at least a portion of the non-volatile memory such that the portion of the non-volatile memory storing the usage information cannot be erased or re-written thereby securely storing this usage information. This lockout/tagout or smart isolation device may be standalone or be part of a system that may potentially serve as part of a facility-wide safety system (for example, networked or in communication with a SCADA system).

Claims

1. A smart isolation device comprising:

a lockable body;

a locking member attached to the lockable body and selectively forming an opened loop or a closed loop with the lockable body;

a wireless link for selective communication with a wireless identification device carried by a user;

a non-volatile memory for storing usage information about the smart isolation device; and

a controller in communication with the wireless link and the non-volatile memory, the controller programmed to receive a signal from the wireless link and write the usage information about the smart isolation device to at least a portion of the non-volatile memory such that the portion of the non-volatile memory storing the usage information cannot be erased or re-written in which the usage information written to the non-volatile memory includes unique identifying information about the wireless identification device used to operate the smart isolation device in conjunction with a state or change of state of the locking member and further includes information about the time of usage of the smart isolation device and an energy isolation point associated with the smart isolation device that are written in conjunction with the unique identifying information about the wireless identification device and the state or change of state of the locking member.

2. The smart isolation device of claim 1, wherein the non-volatile memory is a field programmable read only memory (FPROM), a one-time programmable memory (OTP), or a programmable read only memory (PROM) physically preventing an erasure or re-writing of the portion of the non-volatile memory storing the usage information.

3. The smart isolation device of claim 1, wherein the controller is programmed to prevent the portion of the non-volatile memory storing the usage information from being erased and re-written, even if the non-volatile memory is physically capable of being erased or re-written.

4. The smart isolation device of claim 1, wherein the wireless link, the non-volatile memory, and the controller are supported by the lockable body of the smart isolation device.

5. The smart isolation device of claim 1, further comprising a user-operated control supported by the lockable body and in communication with the controller, the controller further programmed such that, upon operation of the user-operated control, the controller temporarily activates the wireless link for communication with the wireless identification device.

6. The smart isolation device of claim 5, wherein the controller is further programmed to deactivate the wireless link a pre-determined amount of time after the operation of the user-operated control such that the wireless link is deactivated and not communicable with the wireless identification device.

7. The smart isolation device of claim 1, wherein the wireless identification device is one of a plurality of unique wireless identification devices in which each of the plurality of unique wireless identification devices are communicable with the wireless link.

8. The smart isolation device of claim 1, wherein the wireless link includes a radio frequency (RF) transponder in the smart isolation device for reading a radio frequency identification (RFID) tag in the wireless identification device.

9. The smart isolation device of claim 1, wherein the usage information written to the non-volatile memory provides a tamper-proof history of the smart isolation device.

10. The smart isolation device of claim 1, wherein the controller is further configured to alter the smart isolation device between a locked state and an unlocked state upon a detection of the wireless identification device by the wireless link.

11. The smart isolation device of claim 1, wherein the wireless link for selective communication with a wireless identification device operates using a communication protocol selected from the group consisting of near field communication (NFC), WIFI implementing 802.11 standards (WIFI), Bluetooth, Bluetooth Low Energy (Bluetooth LE), and radio frequency identification (RFID).

12. A smart isolation system comprising:

the smart isolation device of claim 1; and

a wireless identification device for selective communication with the wireless link of the smart isolation device.

13. The smart isolation system of claim 12, wherein the wireless link includes radio frequency (RF) transponder in the smart isolation device and a radio frequency identification (RFID) tag in the wireless identification device.

14. The smart isolation system of claim 12, wherein the wireless identification device is embedded in a separate maintenance tool or smart device for use with an item of equipment on which the smart isolation device is placed.

15. The smart isolation system of claim 12, further comprising a locator tag securely and non-movably received on equipment for smart isolation at the energy isolation point on the equipment and wherein the controller of the smart isolation device is programmed to read the locator tag upon use of the smart isolation device to write location information into the usage information.

16. The smart isolation system of claim 12, further comprising a central network for communication with other network elements and a display on other network elements.

17. The smart isolation device of claim 1, wherein the state or change of state of the smart isolation device includes information about whether the locking member is opened or closed.

18. The smart isolation device of claim 1, wherein the locking member is a shackle.

19. The smart isolation device of claim 1, wherein the energy isolation point is located on a piece of equipment.

20. The smart isolation device of claim 19, wherein the piece of equipment comprises a plurality of energy isolation points.

21. The smart isolation device of claim 1, wherein the energy isolation point comprises at least one of a switch and a valve.