| 摘要 |
An efficient, portable, easy to operate fastener applying tool is disclosed that is powered by the gases produced from the internal combustion of a fuel and air mixture. The tool uses an internally contained supply of liquified gas stored under pressure in a cylinder. Air is drawn in from outside the tool and mixed with fuel in a combustion chamber with the aid of a fan powered by an electric motor. A spark plug powered by a piezo-electric firing device is used to ignite the air-fuel mixture in the combustion chamber. Combustion gases are discharged from the cylinder at the end of the driving stroke and air is supplied to the lower face of the piston to return it to the original position. An interlock mechanism is provided to insure that the tool cannot be operated until the combustion chamber is closed and the combustion chamber cannot be reopened after ignition until the trigger is released.
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