US 11,945,667 B2
Accident prevention system for a door or passageway
Rommel B. Ceniza, Guelph (CA); and Eddie Estanqueiro, Milton (CA)
Assigned to Toyota Motor Engineering & Manufacturing North America, Inc., Plano, TX (US); and Toyota Jidosha Kabushiki Kaisha, Toyota (JP)
Filed by Toyota Motor Engineering & Manufacturing North America, Inc., Plano, TX (US)
Filed on Jun. 10, 2022, as Appl. No. 17/837,420.
Prior Publication US 2023/0399185 A1, Dec. 14, 2023
Int. Cl. B65G 69/28 (2006.01)
CPC B65G 69/2882 (2013.01) 11 Claims
OG exemplary drawing
 
1. An accident prevention system for a doorway of a loading dock, the system comprising:
a first sensor configured to detect an object in a first predetermined location and having a height that is greater than a predetermined height;
a second sensor configured to activate responsive to detection by the first sensor of the object having a height that is greater than the predetermined height, the second sensor also being configured to detect the object in a second predetermined location after activation of the second sensor; and
an alert system configured to generate a humanly-perceivable alert responsive to detection of the object in the second predetermined location after the activation of the second sensor.