Automatically resetting combustion tool

Details Automatically resetting combustion tool Automatically resetting combustion tool

B - Operations, Transporting

25

C

B25C 1/08 (2006.01)

Patent

CA 2300712

A powder actuated tool for driving a faster with combustion gases has an automatic reset. To use the device, the operator presses the device to the articles to be fastened, which requires overcoming the force of a spring in order to bring the working end where the fastener exits closer to the piston that rams the fastener. When the device is fired, a charge releases combustion gases into a chamber, whereupon a piston in the chamber is rammed into the head of a fastener to be driven. After the device is fired, the operator releases the pressure, whereupon the spring releases the energy imparted by the operator and resets the device. The reset requires bringing the piston back into contact with the end of the combustion chamber from which the combustion gases entered; the reset is accomplished by a combination of a spring, which brings the chamber forward, and a stop in a fixed position with respect to a housing, which catches the piston and holds it in place until it is effectively driven back into the combustion chamber where it started.

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