| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a sealed tank device capable of preventing the contamination of operating oil by completely interrupting the contact of the operating oil with outside air while suppressing a pressure fluctuation in a tank, and of freely changing the attitude of the tank, and to provide an integrated hydraulic actuator. <P>SOLUTION: The sealed tank device comprises a tank body 1 for storing the operating oil for a hydraulic system, and a means 2 for absorbing a fluctuation of internal pressure with a change in the amount of oil in the tank body. The pressure fluctuation absorbing means has an air-and-liquid-tight bag-shaped body 21 formed of a flexible elastic material, and a suction/exhaust part 22 as part of the inlet of the bag-shaped body. The bag-shaped body is arranged in the tank body in the state of being immersed in the operating oil. The internal cavity of the bag-shaped body is communicated with outside air through the suction/exhaust part, and the inside of the tank body is shut off from outside air by the bag-shaped body. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
