| 摘要 |
<p>This invention relates to a poppet valve device which switches and operates sequentially a plurality of poppet valves by the change-over operation of a pilot valve by an electromagnetic solenoid, for example, operating upon receiving an external input signal. This poppet valve device includes first and second poppet valves (A, B) each constructed in such a manner that a poppet to permit communicating or cutting off of an inlet port (30) with or from an outlet port (31) is moved in a direction of the communicating position by a pressure on the inlet port side acting on its pressure receiving portion (32a) and in a direction of the cut-off position by the pressure acting on its back pressure chamber (38a, 38b), and a pilot valve (C) which connects the back pressure chamber of each poppet valve to a tank (2) and has a variable throttle portion controlled by an external input signal in such a manner as to make the pressures of the respective back pressure chambers different from each other when the poppet of each poppet valve is moved to the position for allowing each inlet port to communicate with each outlet port.</p> |
