| 摘要 |
To provides a technique capable of replenishing a working fluid smoothly while employing a method for replacing an atmospheric air with the working fluid. The reservoir apparatus 10 includes a main reservoir 20 having an inlet opening for feeding a hydraulic fluid, and an auxiliary reservoir 50 connecting thereto through a piping 30. There is a diagonally extending connecting pipe 60 at the auxiliary reservoir 50. There is a recessed portion 80 at an opening portion 64 of an inner periphery of the connecting pipe 60. This recessed portion 80, when compared with the case where there is no such a recessed portion, serves to enlarge the opening portion 64 of the connecting pipe 60 and more smoothly flow the replenishment working fluid at a nearby area of the opening portion 64. By doing so, the opening portion 64 of the connecting pipe 60 can be more enlarged at the time of replenishment of the working fluid and formation of a film of the working fluid can be prevented at the opening portion 64.
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