Methods employing an internal combustion fastener driving tool

Details Methods employing an internal combustion fastener driving tool Methods employing an internal combustion fastener driving tool

1997-12-31

2000-02-01

Kamen, Noah P.

Internal-combustion engines

Free piston

Single chamber; one piston

123 46SC, F02B 7100

Patent

active

060190728

ABSTRACT:
The present invention relates to methods employing internal combustion fastener driving tool for driving a fastener and for starting a flooded tool. A method for starting a flooded tool includes: compressing the tool against an object to slide a piston axially within a piston housing to purge fuel and air from a combustion chamber, and to close a conduit between a metering chamber and a source of gaseous fuel; latching closed the conduit; drawing air into the combustion chamber by releasing the tool from the object; purging the air and any residual mixture of fuel and air from the combustion chamber by compressing the tool; repeating the drawing and purging steps one or more times; and opening the fluid communication between the fuel source and the combustion chamber. A method of employing the tool to drive a fastener includes: positioning a fastener within the tool for driving by the tool; providing a source of gaseous fuel to power the internal combustion driven piston; positioning the tool on a workpiece at a position for driving a fastener; compressing the tool body against the workpiece to slide a piston axially within a piston housing and to move a lock out plate to allow actuation of a trigger for firing the tool; actuating the trigger to fire the tool and drive the fastener; and releasing the tool from the workpiece and expanding the compressed tool.

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