Patent ID: 7343646
Filing Date: 2008-03-18
Classification: E05B,F16F,Y10T

Abstract:
1. A damper comprising: a housing with a cylindrical shape filled with viscous fluid, a rotor rotatably disposed in the housing for receiving a rotational force from outside, a valve arranged on the rotor for changing a position on the rotor to change torque applied to the rotor, and a connecting/separating device for changing the position of the valve relative to the rotor according to a rotational angle of the rotor, wherein said connecting/separating device comprises a hook formed on an outer surface of the rotor, a step formed on the valve to project inwardly therefrom for engaging with or separating from the hook, a pin formed on the valve to project outwardly along a longitudinal direction of the rotor, a guide groove formed in the housing for guiding the pin to move the valve around the rotor so that the position of the valve relative to the rotor is changed to change the torque applied to the rotor, and a stopper formed in the guide groove for restricting a movement of the pin.