| 摘要 |
PROBLEM TO BE SOLVED: To provide a device having a sealed actuator chamber and a vent connected to the actuator chamber. SOLUTION: The vent connects the chamber to exterior atmosphere surrounding the device so as to equalize the pressure in the chamber. The vent has a size and form to allow pressure equalization to occur outside a normal operation cycle of the chamber and controls the pressure to prevent undesirable deflection of a membrane in the chamber and ensure the suitable operation of the device. COPYRIGHT: (C)2006,JPO&NCIPI
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