Patent ID: 7938303
Filing Date: 2011-05-10
Classification: B25C

Abstract:
1. A gas combustion-type driving tool, comprising: a combustion chamber that explosively burns mixed gas obtained by stirring and mixing combustible gas with air; a striking piston that is impulsively driven by high-pressure combustion gas; a nose portion that slidably guides a driver coupled to a lower surface side of the striking piston to drive out a nail; a feed piston and cylinder mechanism that feeds a feed claw to the nose portion side, the feeding claw engaging with and disengaging from connected nails accommodated within a magazine; and a valve that is provided in a path for guiding the high-pressure combustion gas to the feed piston and cylinder mechanism and that communicates the path with atmosphere, wherein the feed piston and cylinder mechanism includes a feed cylinder and a feed piston accommodated within the feed cylinder; wherein the feed claw is connected to the feed piston; wherein, in the feed piston and cylinder mechanism, the feed claw is biased in a feeding direction by a bias member, wherein the feed piston and cylinder mechanism is configured such that the feed piston moves in a returning direction against the bias member by flowing the high-pressure combustion gas into the feed piston and cylinder mechanism, and the feed piston biased by the bias member moves in the feeding direction to feed a nail by actuating the valve to communicate the feed cylinder with the atmosphere.