Patent ID: 6913125

Claim:
A damper comprising: a housing having a cylindrical hollow shape; a viscous fluid filled in the housing; a first rotor rotatably retained in the housing for receiving a rotational force from outside the housing, and having a first connecting portion formed on a side surface extending along an axis of the first rotor at one end portion thereof; a second rotor rotatably retained in the housing coaxially with the first rotor, and having a second connecting portion formed on a side surface extending along an axis of the second rotor at one end portion thereof for allowing the second rotor to rotate together with the first rotor when the second connecting portion is connected with the first connecting portion, said second connecting portion forming a first space in a peripheral direction between the first connecting portion and the second connecting portion when the second connecting portion is released from the first connecting portion so that the viscous fluid passes through the space; and an elastic member disposed in the housing for urging the first rotor and the second rotor in the peripheral direction to connect with each other, said elastic member accumulating an elastic force when the first and second connecting portions move away from each other.