| 摘要 |
PURPOSE:To make light operation attainable as well as to aim at the dependability of action, by having the other end of a second valve stem inserted into an interconnecting hole piercing through both first and second valve chests opposed to the first valve stem connected to a pushbutton switch. CONSTITUTION:Each of first and second valve chests a A and B are installed at both sides of a cylindrical case 1, while these valve chests A and B are connected together through an interconnecting hole C, and valve seats D and E are projectingly formed in these valve chests A and B. Inside the interconnecting hole C, these is the second valve packing 2 pressed to the valve seal E by a coil spring 3 on a lower surface of the tip part, and also there is provided with a second valve stem 4 to be moved by interlocking with a pushbutton switch 12. When this pushbutton switch is operated, a first valve stem 9 moves and valve packing 6 comes into contact with the second valve stem 4. With this constitution, even if a stroke of the first valve stem 9 is little, it is surely operated while operating physical force also can be made very smaller.
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