| 摘要 |
<P>PROBLEM TO BE SOLVED: To simplify working and assembling of respective members such as a housing, a piston member in addition to suppressing the variation of secondary pressure due to that of primary pressure. <P>SOLUTION: On one side of the piston member (3), a secondary pressure chamber (15) is formed. On the other side, pressure reducing springs (4) are arranged and a rod insertion hole (16) is provided. A rod (11) projecting toward inside of a cylinder chamber (9) is inserted to the rod insertion hole (16). A space between the outer surface of the rod (11) and the inner surface of the rod insertion hole (16) is sealed freely slidably by tight sliding parts (27). On a deeper side than the tight sliding parts 27, a pressure reducing valve chamber (17) is formed. At the tip of the rod (11), a pressure reducing valve seat (12) is formed. At the deep wall of the rod insertion hole (16), an exit path (18) communicating the pressure reducing valve chamber (17), the secondary pressure chamber (15) and a gas flow out port (7) is provided. Around the exit path (18), a valve body (19) is provided. The seal diameter of the valve body (19) abutting on the pressure reducing valve seat (12) is set to be nearly equal to a seal diameter at the tight sliding parts (27). <P>COPYRIGHT: (C)2008,JPO&INPIT |
