| 摘要 |
<p>PURPOSE: To secure sealability excellent to gas and liquid inside a housing by interposing a sealing member having high sealability to gas and a sealing member having high sealability to liquid, between a piston and a housing for sectioning a gas enclosing chamber and a liquid chamber. CONSTITUTION: In a gas charging piston type accumulator 1, a piston 3 is fittingly amounted in a cylindrical housing 2 and the opening port of the housing 2 is blocked by a cover 4. Consequently, the gas enclosing chamber 5 and a liquid chamber 6 are formed in front of and behind the piston 3, respectively. In this case, first and second gas side rings 12, 13, and a liquid side O ring 14 are arranged in grooves provided in the circumfernetial direction on the outer circumference of the piston 3. The gas side O rings 12, 13 are arranged in the positions closer to the gas enclosing chamber 5 than to the liquid side O ring 14, and the gas side O ring 12 close to the gas enclosing chamber 5 is formed of a material 1 chose gas permeability is low, and the liquid side O ring 14 is formed of a liquid sealing member.</p> |
