Patent ID: 8469163
Filing Date: 2013-06-25
Classification: F16F

Abstract:
1. A rotary damper comprising a valve mechanism, wherein the valve mechanism comprises wherein the damper is structured and arranged to apply fluid pressure behind the valve body which increases in proportion to a load, wherein the valve body is structured and arranged to move forward into the operating chamber upon receiving the pressure of the fluid, through a flow path formed between an inner peripheral surface of a peripheral wall of the operating chamber and an outer peripheral surface of the valve body, wherein the valve mechanism further comprises a flow path which is formed by the forward movement of the valve body, wherein the damper is structured and arranged such that the fluid moves only through the flow path when the valve body moving from the valve chamber to the operating chamber, wherein a length of the flow path becomes longer as the valve body moves forwardly, and wherein an area of the flow path becomes smaller as the valve body moves forwardly when the pressure of the fluid is less than a predetermined value.