| 摘要 |
The specification describes a dashpot having a vane member pivotably mounted in a fluid-filled body to be rotatable through an angle of less than 360 DEG . Movement of the vane member displaces the dashpot fluid through a valve that has an adjustable throttling effect and the damping rate of the dashpot is controlled thereby. The valve is mounted in a recess of a necked end of the dashpot body concentric with the pivot axis of the vane member and a control knob having a lip that overlaps said necked end is fixed to the valve to rotate it. A ring-form sealing member has an inner peripheral region secured to the valve and an outer peripheral region secured to the necked end of the body. A supplementary sealing member is compressed between said outer peripheral region and the control knob lip to provide a further seal at this position. A resilient clamping band at the inner peripheral region assists the seal there. Calibration means are also provided between the control knob lip and said necked end of the body to facilitate adjustment of the valve and these calibration means are further employed to set limits to the rotational adjustment of the valve.
|
