| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a liquid force feed device having a simple structure which prevents an air supply valve element and a lower lifting rod from being inclined. <P>SOLUTION: The liquid force feed device 1 has a sealed container 2 having an operating fluid introduction port 11, an operating fluid drain port 13, a liquid inflow port 16 and a liquid drain port 17. Also, the liquid force feed device switches the opening and closing of an air supply valve element 21 for opening and closing an air supply valve port 24 in the operating fluid introduction port 11 and an exhaust valve element 30 for opening and closing an exhaust valve port 32 in the operating fluid drain port 13 in accordance with the height of a liquid surface of a liquid staying in the sealed container 2. A lower lifting rod 22 for opening the air supply valve element 21 is integrally mounted to the air supply valve element 21 and the lower lifting rod 22 is vertically guided by a lower guiding member 20a. Also, a cylindrical filter 23 with which the outer surface of the air supply valve element 21 slidingly comes into contact is disposed around the air supply valve element 21, and the outer surface of the air supply valve element 21 is vertically guided on the inner face of the cylindrical filter 23. <P>COPYRIGHT: (C)2012,JPO&INPIT |
