| 摘要 |
<p>PURPOSE: To obtain excellent fluid-tightness and pressure tightness by respectively forming recessing and projecting surfaces of an axial line direction on the outside circumferential face of an inner cylinder and the inside circumferential face of an outer cylinder, and disposing at least one resilient ring between both the recessing and projecting surfaces. CONSTITUTION: Recessing and projecting surfaces 6, 7 having recesses and projecting parts to an axial direction are respectively formed on the outside circumferential face of an inner cylinder 1 and the inside circumferential face of an outer cylinder 2. At least one resilient ring 10 having a required cross-sectional shape is disposed between the recessing and projecting surfaces 6, 7. In such a fluid-tight movement structure, at least one resilient ring 10 is sufficiently tightly contacted to both the recessing and projecting surfaces 6, 7 when the inner and outer cylinders are in a state of repose.</p> |
