| 摘要 |
Packing or sealing moving in a hollow cylinder. Such a device, or moving piston with self-tightening ring, comprises two elements of cylindrical external outline such as a cylindrical rod integral with the first element slides in a cylindrical chamber delimited inside a second element and facing the first element, the two elements being separated by an annular ring that ensures the packing or sealing with the internal wall of the cylinder. Such a piston allows to suppress use of mercury as pressure transmission agent.
|
