| 摘要 |
PROBLEM TO BE SOLVED: To automatically count the number of times of gas suction in a gas suction pump, without using electricity. SOLUTION: The gas suction pump is equipped with at least a cylinder, the support cylinder being provided to one end part of the cylinder, the shaft inserted in the support cylinder in a sliding state and the piston being connected to the end part on the inside of the cylinder of the shaft and constituted so as to slide the piston in the cylinder to suck the gas into the cylinder. A stroke completion confirming means is provided to the end part side in the cylinder of the shaft and a detection means, capable of detecting the completion of a stroke due to the stroke completion confirming means is provided in the support cylinder, while a counter capable of counting the number of times of the stroke detected by the detection means is provided to the outside of the support cylinder for counting the number of times of the stroke. According to this constitution, the number of times of gas suction can be automatically counted, without using electricity. COPYRIGHT: (C)2006,JPO&NCIPI
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