US 12,404,714 B2
System and method for safety management in roll-up doors
Daniel Gregoriou, Kewaskum, WI (US)
Assigned to Rytec Corporation, Jackson, WI (US)
Filed by Rytec Corporation, Jackson, WI (US)
Filed on Jan. 31, 2022, as Appl. No. 17/589,540.
Application 17/589,540 is a continuation in part of application No. 16/847,429, filed on Apr. 13, 2020, granted, now 11,236,540.
Application 16/847,429 is a continuation of application No. 15/264,179, filed on Sep. 13, 2016, granted, now 10,619,397, issued on Apr. 14, 2020.
Claims priority of provisional application 62/218,328, filed on Sep. 14, 2015.
Prior Publication US 2022/0228420 A1, Jul. 21, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. E05F 15/74 (2015.01); E06B 9/68 (2006.01); E05F 15/73 (2015.01)
CPC E05F 15/74 (2015.01) [E06B 9/68 (2013.01); E05F 2015/765 (2015.01); E05Y 2400/44 (2013.01); E05Y 2400/822 (2013.01); E06B 2009/6836 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An overhead door assembly comprising:
a door panel;
a motor for facilitating the raising and lowering of the door panel;
a controller to control activation of the motor;
a first light curtain in communication with the controller, the first light curtain comprising a first array of photo eye sets having a first plurality of light emitters and a first plurality of light receivers, the first array of photo eye sets extending vertically along the doorway and being positioned such that a beam emitted and received by each photo eye set in the first array of photo eye sets extends parallel to the door panel when the door panel is in a closed position, wherein each photo eye set in the first array of photo eye sets is set at a known vertical height along the doorway, and the controller is configured to determine a size of traffic passing through the first light curtain based;
a second light curtain in communication with the controller, the second light curtain comprising a second array of photo eye sets having a second plurality of light emitters and a second plurality of light receivers, the second array of photo eye sets extending vertically along the doorway and being positioned such that a beam emitted and received by each photo eye set in the second array of photo eye sensors extends parallel to the door panel when the door panel is in a closed position, wherein each photo eye set in the second array of photo eye sets is set at a known vertical height along the doorway, and the controller is configured to determine a size of traffic passing through the second light curtain;
wherein a protected zone monitored by the controller is formed around the door panel between the first light curtain and the second light curtain.