| 摘要 |
A cup-shaped diaphragm is inserted into a bore formed in a housing. An inlet opening of the bore is closed by a plug-like wall member. A conduit li ne extends obliquely with respect to an axis of the bore from an annular space farmed between a cylindrical wall of the bore and a protruding portion of th e plug-like wall member. The annular space is connected to a pressurizing control valve via the conduit line. A chamber, partitioned from the annular space by the cup-shaped diaphragm, serves as a damper chamber which has a diameter substantially equivalent to a diameter of the bore.
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