US 11,898,371 B2
Tamper alarm for electronic lock
James Lin, Laguna Niguel, CA (US); and Matthew Lovett, Lake Forest, CA (US)
Assigned to ASSA ABLOY Americas Residential Inc., New Haven, CT (US)
Filed by ASSA ABLOY Americas Residential Inc., New Haven, CT (US)
Filed on Oct. 22, 2021, as Appl. No. 17/508,454.
Application 17/508,454 is a continuation of application No. 16/425,491, filed on May 29, 2019, granted, now 11,156,020.
Claims priority of provisional application 62/677,499, filed on May 29, 2018.
Prior Publication US 2022/0228399 A1, Jul. 21, 2022
Int. Cl. G08B 21/00 (2006.01); E05B 45/06 (2006.01); G07C 9/00 (2020.01); G08B 13/06 (2006.01); E05B 47/00 (2006.01); H04L 67/10 (2022.01)
CPC E05B 45/06 (2013.01) [E05B 47/0001 (2013.01); G07C 9/00571 (2013.01); G08B 13/06 (2013.01); H04L 67/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electronic lock comprising:
a latch assembly including a bolt movable between an extended position and a retracted position;
a keypad for receiving a keypad input event; and
a processing unit configured to control movement of the bolt between the extended position and the retracted position responsive to receiving a valid keypad input event, wherein the processing unit is configured to capture the keypad input event;
wherein, based at least in part on a characteristic of the keypad input event, the processing unit detects and indicates if a tampering event exists, wherein the characteristic includes at least one of an input location on the keypad, an input duration on the keypad, and an input timestamp; and
wherein the processing unit detects the tampering event by comparing the input duration on the keypad to an acceptable input duration value, the acceptable input duration value based, at least in part, on a normal use profile created based on analysis of historic keypad input events that indicate patterns during a plurality of authorized actuations of the electronic lock.