Invention Grant
- Patent Title: Emergency door opening actuator
- Patent Title (中): 紧急门打开执行器
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Application No.: US11084667Application Date: 2005-03-18
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Publication No.: US07574826B2Publication Date: 2009-08-18
- Inventor: Rob J. Evans
- Applicant: Rob J. Evans
- Agency: Schmeiser, Olsen & Watts LLP
- Main IPC: E05F15/20
- IPC: E05F15/20

Abstract:
An emergency door opening actuator includes electrical switches that are at least one of normally open and normally closed. The electrical switches may be connected accordingly in parallel or in series to terminals of an overhead door operator. The terminals may correspond to a push button circuit, an obstruction sensing circuit, an alarm system circuit, and/or a door opening circuit. The emergency door opening actuator may take advantage of a protocol in the operator to cause the overhead door to open during an emergency condition to facilitate egress. Likewise, the emergency door opening actuator may cause that the overhead door cannot close by signaling the protocol in a predetermined way when the switches are actuated by an emergency condition. The electrical switches may be mechanically actuated when at least one fusible link is broken. The emergency door opening actuator may include an automatic mechanical stop and/or a test release mechanism.
Public/Granted literature
- US20050252613A1 Emergency door opening actuator Public/Granted day:2005-11-17
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