| 摘要 |
PROBLEM TO BE SOLVED: To provide a shock absorber capable of easily expanding a pressure fluctuation dampening performance.SOLUTION: A shock absorber 100 comprises a main body 110 having a connection part 113 connected to a drain pipe P and defining an internal space 118 communicated with an inside part of the drain pipe P and insulated against external environment; and a volume variation body 120 held by the main body 110 and of which volume varies in response to a variation of internal pressure of the drain pipe P. The main body 110 is provided with an expansion part 116 for directly or indirectly connecting a connecting part 113' of an additional shock absorber 100' having the same configuration as that of the shock absorber 100. The internal space 118 of the shock absorber 110 and the internal space 118' of the additional shock absorber 100' are communicated through the expansion part 116. When the additional shock absorber 100' is not additionally installed, the expansion part 116 is closed by a shutting part.SELECTED DRAWING: Figure 9 |
