| 摘要 |
<p>PURPOSE:To eliminate breakage of a bladder due to its excessive expansion by arranging a plug member, which is connected to the bladder in a fluid guide hole, which opens to a fluid chamber, and closing the fluid guide hole as soon as the bladder excessively extends because of excessive fluid pressure. CONSTITUTION:A fluid entrance 15 is provided to an opening part of a fluid chamber 11B, which is formed by partitioning an internal space of a shell 11 by means of a bladder 20. In addition, a plug member 23, which closes a fluid guide hole 15A, when the bladder 20 excessively extends because of flow-in of excessive fluid pressure, is arranged in a fluid entrance 15, being connected to the bladder 20. With this contrivance, an excessive rise of the pressure the fluid chamber 11B or an excessive elongation of the bladder 20 can be prevented, thereby avoiding breakage of the bladder 20.</p> |
