US 12,006,767 B2
Apparatus and methods for door curtain breakaway detection
Ryan P. Beggs, Dubuque, IA (US); Michael Sivill, Dubuque, IA (US); Christopher Saleh, Ames, IA (US); Charles Runde, Hazel Green, WI (US); James Pelegrin, Dubuque, IA (US); Nicholas J. Casey, Cascade, IA (US); and Perry W. Knutson, Lancaster, WI (US)
Assigned to RITE-HITE HOLDING CORPORATION, Milwaukee, WI (US)
Filed by Rite-Hite Holding Corporation, Milwaukee, WI (US)
Filed on Jun. 6, 2023, as Appl. No. 18/329,718.
Application 18/329,718 is a continuation of application No. 17/016,019, filed on Sep. 9, 2020, granted, now 11,708,722.
Claims priority of provisional application 62/897,790, filed on Sep. 9, 2019.
Prior Publication US 2024/0084644 A1, Mar. 14, 2024
Int. Cl. E06B 9/58 (2006.01); E06B 9/13 (2006.01); E06B 9/68 (2006.01)
CPC E06B 9/581 (2013.01) [E06B 9/13 (2013.01); E06B 2009/585 (2013.01); E06B 2009/6827 (2013.01); E06B 2009/6836 (2013.01); E06B 2009/6845 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a plurality of tags distributed along a lateral edge of a door curtain, the tags to travel along a channel within a guide of a door as the door curtain moves along the guide;
a scanner disposed on the guide, the scanner to detect ones of the tags as the tags pass the scanner during an operational state of the door curtain; and
a controller to identify when the door curtain transitions from the operational state to a breakaway state based on a signal from the scanner, the operational state corresponding to when the lateral edge of the door curtain is enclosed by the guide as the door curtain moves between open and closed positions, the breakaway state corresponding to when a portion of the lateral edge of the door curtain below an upper end of the guide breaks away from the guide, the portion of the lateral edge including at least one of the tags.