| 摘要 |
PROBLEM TO BE SOLVED: To stably and surely supply a gas fuel into a combustion chamber. SOLUTION: In a gas combustion type driving tool, the gas fuel is supplied into the combustion chamber, a mixed gas produced by agitating and mixing the gas fuel and air is ignited, and a hammering mechanism is driven by the combustion pressure. A measurement chamber 22 is formed inside the intermediate part of a gas pipe between a gas cylinder and the combustion chamber. An electromagnetic valve 23 is installed in the measurement chamber 22. When the gas fuel is supplied into the combustion chamber, the portions of the gas pipe on the upstream side and the downstream side of the measurement chamber 22 are opened for a specified time by the electromagnetic valve 23 to supply the gas fuel in the measurement chamber 22 into the gas pipe path 11 by the jetting pressure of the gas fuel in the gas cylinder. COPYRIGHT: (C)2009,JPO&INPIT
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