| 摘要 |
A pressure-adjusting reservoir which can reduce an unstable movement of a ball valve therein to release a pulse of brake fluid. The pressure-adjusting reservoir has a pressure-adjusting valve constructed so that a tip portion of a pin pushes up a ball valve to open a valve hole when brake fluid reserved in a reservoir chamber is less than a predetermined amount, and the tip portion of the pin is released from the ball valve to close the valve hole when the reservoir chamber is filled with the predetermined amount of brake fluid. The tip portion of the pin has a slant surface slanting with respect to a sliding direction of the pin. In this case, the ball valve contacts with at least two portions including the slant surface and one of a part of a valve seat and inner wall of a housing, and is supported at plural portions. Therefore, the unstable movement of the ball valve can be reduced.
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