Patent ID: 8511528

Claim:
A combustion power tool comprising: first and second combustion chambers to which flammable gas is respectively filled, a partition that separates the first combustion chamber from the second combustion chamber, openings that are formed in the partition and serve to communicate the first combustion chamber with the second combustion chamber, and a drive section that is caused to move toward a front end by combustion pressure and performs a predetermined operation, the combustion pressure being generated when a combustion gas flow caused by combustion of flammable gas in the first combustion chamber propagates to the second combustion chamber through the openings and burns flammable gas in the second combustion chamber, wherein the combustion gas flows from the first combustion chamber to the second combustion chamber in a direction around a central axis of the second combustion chamber while flowing along an inner wall of the second combustion chamber, and the partition has a plurality of first openings through which the gas flowing from the first combustion chamber to the second combustion chamber forms an axial flow in the direction of the central axis of the second combustion chamber and a plurality of second openings through which the gas forms a swirl flow in a direction around the central axis.