| 摘要 |
PURPOSE:To reduce an overall length and prevent the occurrence of an unusual sound by engaging a link member with a key member for stopping the coming out of a valve plunger and bringing said link member in contact with a shell through a diaphragm. CONSTITUTION:A key member 7 for preventing a valve plunger 20 from coming out of a valve body 3, is freely swingable with a fulcrum 7b as its center, which is formed at the central part of the key 7. One end of the plunger 20, which is installed in a valve body 3 and can be axially reciprocated, is opposed to the end part of the key member 7, and the other end of the plunger 20 is opposed to one end of an operating lever 21 provided on the constant-pressure chamber 5 side. The operating lever 21 is supported by a return spring 18 on the front end surface of the valve body 3 while its end is positioned in the opening 23 formed in a power piston 2 and opposed to a diaphragm 4 from the constant-pressure chamber 5 side. And, when not operating, the end of the operating lever 21 is brought in contact with a shell through the diaphragm 4. |
