HYDRAULIC TYPE AUTOMATIC BUFFERING HINGE

摘要

PURPOSE: A hydraulic typed automatic buffering hinge is provided to minimize the damage of assets and of lives by maximally reducing to spread the flame by automatically closing a door when the temperature is risen over a certain temperature by generating the fire. CONSTITUTION: The hydraulic typed automatic buffering hinge is control the hydraulic pressure by; installing a needle valve(32)(32a) pressed by a coil spring(31)(31a) in a control bolt(30)(30a) in a passage(20) and in a oil drain hole(22); buffering by forming a large passage by opening a needle valve(32)(32a) when a shocking hydraulic pressure is generated inside a cylinder; operating the needle valve(32)(32a) in a right position when the hydraulic operation is uniform; slowly closing the door by the needle valve(32)(32a) in the end of the door closing.