Fastener driving device

Abstract

A fastener driving device comprising a combustion chamber, a piston and a fastener channel. The piston is coupled to the combustion chamber and slidable within a sleeve such that combustion gas expansion causes the piston to slide from a first position to a second position. The fastener channel is configured to receive a fastener, wherein when moving from the first to the second position, the piston is configured to engage the fastener. In one embodiment the device comprises a return chamber for receiving gas from the sleeve via a first vent, and a second vent coupled to the return chamber and for supplying combustion gas from the combustion chamber to the return chamber. In another embodiment, the combustion chamber comprises a housing portion, wherein combustion gas expansion acts on the housing portion such that the housing portion moves to open the combustion chamber and exhaust combustion gases.

Dependencies are inferred from the claim text.