Patent ID: 6536565
Filing Date: 2003-03-25
Classification: B60G,F16F

Abstract:
A rotary damper using damping fluid comprising:a case having a fluid chamber containing the damping fluid and an axle opening; a rotor comprising an axle and a first rotor vane, the rotor disposed within the fluid chamber so the first rotor vane divides the fluid chamber into a first fluid volume and a second fluid volume, the first rotor vane having a first flow passage and a second flow passage connecting the first fluid volume and the second fluid volume, the rotor further disposed so that the axle is rotatably supported by and passes through the axle opening; a first check valve mounted in the first flow passage, allowing damping fluid flow from the second fluid volume to the first fluid volume, and limiting flow from the first fluid volume to the second fluid volume; a first control valve mounted in the first flow passage, controlling damping fluid flow between the first fluid volume and the second fluid volume, the first control valve being a deflected disk valve; a second check valve mounted in the second flow passage, allowing damping fluid flow from the first fluid volume to the second fluid volume, and limiting flow from the second fluid volume to the first fluid volume; and a second control valve mounted in the second flow passage, controlling damping fluid flow between the first fluid volume and the second fluid volume; wherein the rotor contains an accumulator hydraulically connected to the fluid chamber.