Patent ID: 7416063

Claim:
A one-way damper comprising: a cylindrical housing, a viscous fluid contained within the housing, a rotor rotatably disposed in the housing and having a columnar center part for forming a rotational center, and a control wall extending radially outwardly from the center part for dividing an inside of the housing, said control wall having a distribution path, a valve body having a holding part for holding the center part from outside thereof and a free edge part extending from one side of the holding part for opening and closing said distribution path, said holding part having a shape mostly covering an outer surface of the columnar center part except for the control wall while allowing the free edge part to rotate to closely contact with the center part and slightly away from the center part so that the valve part is rotationally attached to and retained by the columnar center part by itself, and a seal member for preventing the viscous fluid from leaking between the housing and the rotor.