Invention Grant
- Patent Title: Fire door method of operation
- Patent Title (中): 防火门操作方法
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Application No.: US14195760Application Date: 2014-03-03
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Publication No.: US09175513B2Publication Date: 2015-11-03
- Inventor: David Dawdy
- Applicant: CIW Enterprises, Inc.
- Applicant Address: US PA Mountaintop
- Assignee: CIW Enterprises, Inc.
- Current Assignee: CIW Enterprises, Inc.
- Current Assignee Address: US PA Mountaintop
- Agent Mitchell A. Smolow
- Main IPC: E05F15/20
- IPC: E05F15/20 ; E06B9/68 ; A62C2/10 ; E05F15/72 ; A62C2/24 ; E06B5/16

Abstract:
The present invention presents a method to permit emergency egress through an access opening covered by an overhead coiling fire door. Upon receiving an alarm notification from a first detector located on one side of the access opening the door is power closed to a predetermined height and held there for the predetermined time, then power closed to a fully closed position. Upon receiving a second alarm notification from a second detector located on the opposite side of the access opening the door enters into a secondary alarm condition. The door is power closed and awaits notification to initiate a secondary emergency egress sequence. The secondary emergency egress sequence comprises receiving a door opening notification, opening the door, holding the door open for a predetermined time, and reclosing the door. Upon primary power restoration or a return to a non-alarm condition the door returns to its preset open position.
Public/Granted literature
- US20140246154A1 FIRE DOOR METHOD OF OPERATION Public/Granted day:2014-09-04
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