Patent ID: 8651164
Filing Date: 2014-02-18
Classification: A62C,E05Y,Y10T

Abstract:
1. A method for providing vertical acting egress and fire and smoke protection using an overhead coiling door comprising the steps of: power closing the door to a closed position upon entering an alarm state; while still in the alarm state power opening the door to a pre-established emergency egress height upon activation of an egress device, pausing for a pre-established period of time, and reclosing; and returning to a fully open position once the alarm state ends; wherein the door is powered by an operator powered by a self-contained power cell and an additional operator logic having a normal power cell condition, a Level 1 low power cell condition, a Level 2 low power cell condition, and a Level 3 low power cell condition; wherein wherein the operator reengages the clutch and motor drive when the power cell returns to a normal power cell condition and the predetermined temperature high temperature limit trip sensor did not activate; and wherein spring tension is released by a spring release mechanism comprising: