Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
Door and door hanger device at elevator landing
A door panel includes a surface board facing a hoistway, a back board facing a hoistway, and a reinforcing member for reinforcing the surface board and the back board. The back board is connected to the surface board or the reinforcing member by a connecting member 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 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.
Kabushiki Kaisha Toshiba Toshiba Elevator Kabushiki Kaisha
E B E
E06B B66B E06B
inventional inventional additional
Masato Hisato
Watabe Ito