Patent ID: 6561323
Filing Date: 2003-05-13
Classification: B60N,F16F

Abstract:
A rotary damper including a pair of rotary members which relatively pivot via a rotary support shaft, said rotary damper comprising:an outer tube which has a tubular space inside a wall of said outer tube and is configured such that one end of said space is closed; an inner tube having a smaller diameter than that of said outer tube, an outer wall of said inner tube being fitted into the tubular space of said outer tube, and the inner wall of said outer tube being fitted into the tubular space of said inner tube; a first O-ring installed in an end portion on the open side of a gap between an inner portion of the outer wall of said outer tube and an outer portion of the outer wall of said inner tube; a second O-ring installed in an end portion on the open side of the gap between an inner portion of the inner wall of said outer tube and an outer portion of the inner wall of said inner tube; a viscous substance with which the gaps between said inner tube and said outer tube sealed by said first and second O-rings are filled, a central hole of said inner tube serving as a through-hole for receiving said a rotary support shaft; and a mating member, mating with the respective rotating members, being provided on said inner tube and said outer tube.