| 摘要 |
PROBLEM TO BE SOLVED: To attach many pressure actuation devices having respective functions to an apparatus using these pressure actuation devices since almost all of various pressure actuation devices are single-function devices. SOLUTION: Adjustment springs for energizing a pressure sensitive board are divided into a main spring and an auxiliary spring, only the auxiliary spring energizes the pressure sensitive board under low pressure, and when the pressure sensitive board reaches an optional set position, composite force of the auxiliary spring and the main spring energizes the pressure sensitive board, so that pressure of two stages can be sensed by one pressure sensitive board. A pressure actuation device having both of a low pressure switch function and a pressure reducing function is obtained by constituting the adjustment springs for energizing the pressure sensitive board of a pressure reducing valve as mentioned above and attaching a detector for outputting an electric signal to the apparatus in accordance with the movement of the pressure sensitive board, and a pressure actuation device having both of a low pressure switch function and a high pressure switch function is obtained by constituting the adjustment springs for energizing the pressure sensitive board of a pressure switch as mentioned above. A pressure actuation device having both of the low pressure switch function and a pressure opening/closing valve function is obtained by constituting adjustment springs for energizing the pressure sensitive board of the pressure opening/closing valve as mentioned above. COPYRIGHT: (C)2006,JPO&NCIPI
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