Patent ID: 6619704
Filing Date: 2003-09-16
Classification: E05B,Y10S,Y10T

Abstract:
An emergent unlatching mechanism, mainly comprising a guide tube and a connecting tube simply and easily attached to a fire door latch, wherein:said guide tube is mounted on a seat with an opening, said seat sits on a base plate of a latch assembly, a chamber formed between a casing and said base plate to receive said guide tube, an outlet of said guide tube facing directly toward a bottom of an upper arm, said connecting tube having one end linked to an intake seat and an intake, said intake seat mounted on a surface of a fire door, said connecting tube linking to interior of said fire door, said intake extending out of said fire door; and said latch assembly fastened on a surface of said fire door, said guide tube linking with said connecting tube permitting an emergent unlatch of said latch assembly by high-pressure water.