| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce shock when an exhaust valve element is seated at an exhaust valve port. <P>SOLUTION: In this liquid pressure-feed device, a sealed container 2 includes a working fluid introduction port 11, a working fluid discharge port 13, a liquid inflow port 16 and a liquid discharge port 17. An air supply valve is provided at the working fluid introduction port 11, an exhaust valve is provided at the working fluid discharge port 13, and opening and closing of the air supply valve and the exhaust valve are switched via a valve shaft operation rod 46 by snapping and moving the valve shaft operation rod 46 by operating a snap mechanism 5 using a spring 26 according to elevating/lowering of a float 3 arranged in the sealed container 2. The exhaust valve includes an exhaust valve element 47 connected to the valve shaft operation rod 46 and the exhaust valve port 51 to be opened/closed by a shoulder portion 52 of the exhaust valve element 47. The air supply valve includes a spherical air supply valve element 53 to be openably operated by the exhaust valve element 47 and an air supply port 50 to be opened/closed by the spherical air supply valve element 53. A conical spring 60 gradually reduced in diameter downward is provided to energize the spherical air supply valve element 53 in a direction to close the air supply port 50 on a lower side. <P>COPYRIGHT: (C)2013,JPO&INPIT |
