ROTATION TYPE OIL DAMPER

摘要

A rotary type oil damper is provided to make a door open to be the designated angle and to prevent a safety accident that the door suddenly closed in advance. A rotary type oil damper comprises: a blade(150) arranged within a closed space(161) in which the viscous fluid is filled; a rotary shaft(130) connected to a torque damping object and rotating the blade; a first flow path(101) formed in the rotary shaft so that the viscous fluid pass in the rotation of the rotary shaft; and an operation valve(165) opening and closing the first flow path, moving by the hydraulic pressure of the viscous fluid flowing in the first flow path.