Oblon, Spivak, McClelland, Maier & Neustadt, P.C
Elevator hall door and door hanger apparatus
A door panel comprises a surface board 11 facing a hoistway, a back board 12 facing a hoistway, and a reinforcing member 13 for reinforcing the surface board 11 and the back board 12 . The back board is connected to the surface board or the reinforcing member by a connecting member 15 which is capable of losing the force of constraint against the surface board or the reinforcing member on high temperature conditions during a fire. This connecting member 15 prevents the door panel of the elevator hall door from being deformed during a building fire, and prevents the elevator hall door from falling, thus preventing smoke and flame from entering the hoistway.
Toshiba Elevator Kabushiki Kaisha Kabushiki Kaisha Toshiba
B E E
B66B E06B E06B
inventional inventional additional
Masato Hisato
Watabe Ito