Patent ID: 6612357
Filing Date: 2003-09-02
Classification: E06B

Abstract:
An industrial door including an impact detection system, the door being movable relative to a doorway between blocking and unblocking positions, the detection system comprising:a first member disposed adjacent the door, and which moves with the door relative to the doorway between the blocking and unblocking positions during unimpeded door operation; a second member coupled to the door for travel with the door relative to the doorway between the blocking and unblocking positions; the first member and second member being disposed in an initial state of engagement during unimpeded door operation, and disposed in a different state of engagement for an impact on the door above a predetermined magnitude; a radiation emitter and a radiation detector which form a part of a subsystem which is in a first state when the first and second member are in the state of initial engagement, and a second state when the first and second member are in a different state of engagement.