| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid pressure-feeding device in which an air feeding valve element can be downwardly moved by downward movement of an operation rod by preventing the air feeding valve element from being turned along an inner peripheral wall of a cylinder surface of a valve chamber at a position where an air feeding valve port is opened. SOLUTION: In the liquid pressure-feeding device 1, an exhaust valve port 51 is firstly opened and the air feeding valve port 50 is closed to make the liquid flowing-in from a liquid flowing-in port 16, and subsequently the exhaust valve port 51 is closed and the air feeding valve port 50 is opened to pressure-feed the liquid accumulated in a sealed container 2 from a liquid discharge port 17. An inner peripheral wall at an operation fluid introduction port 11 side of the air feeding valve port 50 is formed to a conical surface 60 enlarged toward the operation fluid introduction port 11 side and a cylindrical surface 61 continued from the conical surface 60. A spherical air feeding valve element 53 for opening/closing the air feeding valve port 50 is arranged on a valve chamber 62 comprising the conical surface 60 and the cylindrical surface 61. The operation rod 49 of the exhaust valve element 47 for opening/operating the air feeding valve element 50 is arranged at an inner side of the sealed container 2 of the air feeding valve port 50, and a projection comprising an inner peripheral wall pin 63 of the cylindrical surface 61 of the valve chamber 62 is provided. COPYRIGHT: (C)2008,JPO&INPIT
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