| 摘要 |
PURPOSE:To enable sealing with a single seal ring by a method wherein a seal ring, which has an internal and an external lips integrated which are in contact with both an internal and an external materials, is provided on a edge side in the direction of a cylindrical piston shaft. CONSTITUTION:A piston housing 6 consists of a cylindrical external material 1 and a rod-shaped internal material 4. A cylindrical piston 7 is installed in this cylindrical piston housing 6 and on the inner edge side 8 in the direction of the cylindrical piston 7 shaft, a seal ring 10 which has an integrated unit consisting of an external lip 11 contacting with an inner face 3 of the external material 1 and an internal lip 12 contacting with an outer surface 5 of the internal material 4 is provided. This enables one cylindrical piston to seal with a single seal ring, thereby decreasing parts in number. |
