| 摘要 |
A partitioning body is fixed to an inner wall of a gas-charged cylinder to separate the cylinder into an actuating chamber and a pressure accumulating chamber, and a thermo-actuator is provided in the partitioning body. A plunger valve device comprising a plunger valve and a valve seat is provided in the partitioning body. A piston rod of a piston is slidably mounted in actuating chamber of the cylinder, an end of the piston rod is projected from the actuating chamber. The plunger valve is arranged to be engaged with the valve seat to close the plunger valve device when projected from the partitioning body by the thermo-actuator, and arranged to be disengaged from the valve seat to open the plunger valve device when retracted by the piston.
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