| 摘要 |
PURPOSE: A liquid container is provided to prevent the creation of negative pressure in a liquid container for a pressure medium of a hydraulic device due to pressure fluctuation in the liquid container by providing the pressure container with a means for compensating pressure between the atmospheric pressure and pressure in the liquid container, and a means for compensating the volume difference of the pressure medium, separately from each other. CONSTITUTION: The liquid container(1) for supplying an internal pressure medium(2) to a hydraulic device through a conduit(8) and receiving an excess pressure medium and bubbles has a casing (1a) closed with a cover(5). A bellows(3) for compensating the difference of two pressure levels of the pressure medium is provided in the container(1), and a gas permeable diaphragm(4) is fitted to the end face(11) of the bellows(3). An inner chamber(9) functioning as an air cushion(10) is partitioned by the bellows(3) and diaphragm(4). The diaphragm(4) is pressed by the air cushion(10) until coming in contact with the pressure medium(2), and when the pressure of the pressure medium(2) rises, pressure fluctuation is absorbed by the deformation of the bellows(3).
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