COMBUSTION FASTENING TOOL HAVING LOCK FEATURES

摘要

A gas setting tool, wasting a limited amount of fuel. The tool comprises i) an internal combustion engine, with a device (2) for injecting fuel in the chamber of the engine, comprising a check valve (13) and an injection piston (22), the injection piston (22) extending beyond the check valve (13), and iii) a sealing joint (40) mounted on the injection piston (22) of the check valve (13). The injection piston (22) comprises an internal bore (24) opened on the exterior and the check valve (13) and its injection piston (22) are arranged so that, in an opening position, the fuel in a container (1) is able, outside the check valve (13), to only flow through the internal bore (24) of the injection piston (22). Thanks to this invention, fuel waste is reduced to the best.