Energy-saving automatic emergency door lock

The present invention relates to an energy-saving door automatic emergency door lock. More specifically, it usually closes the rooftop exit door of a building by self-restraining the rooftop door of the building, and opens the rooftop exit door by releasing the restraint of the rooftop exit door in...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	KOO, BON HO, KIM, KWANG TAE
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	ACCESSORIES THEREFOR FIXED CONSTRUCTIONS HANDCUFFS KEYS LOCKS SAFES WINDOW OR DOOR FITTINGS
Online-Zugang:	Volltext bestellen
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