Patent ID: 7258211

Claim:
A rotary damper comprising: a housing; a fan-shaped oil chamber formed in the housing; a vane dividing said oil chamber into two chambers; a shaft rotatably fastened to said housing and fixed to a base part of the vane such that said vane extends only in one direction away from said base part; and a seal part provided on said base part sealing in a fluid-tight manner between a bearing rotatably supporting said shaft on said housing and said two chambers, wherein: the oil chamber generates a damping force by passing operating oil between said two oil chambers when said vane oscillates; and said seal part includes: a pair of washers sandwiched between an inner face of the housing of said two chambers and the base part; and a sealing member provided to at least portions of three edges of said vane which seals in a fluid-tight manner between said vane and the inner face of said housing, said sealing member having ends facing said base part of said vane and contacting outer circumferential surfaces of said washers so as to seal in a fluid-tight manner therebetween.