Patent ID: 7243829

Claim:
A combustion power tool, comprising: a first combustion chamber and a second combustion chamber into which flammable gas is charged, an igniter disposed in the first combustion chamber, a dome shaped partition that separates the first combustion chamber from the second combustion chamber, communication holes formed in the dome shaped partition at different angles with respect to the longitudinal direction of the first combustion chamber, wherein the communication holes communicating the first combustion chamber with the second combustion chamber, and a driving mechanism that performs a predetermined processing work by utilizing a combustion pressure, the combustion pressure being generated when flammable gas in the first combustion chamber is burned by the igniter and when the burning front of the flammable gas in the first combustion chamber propagates to the second combustion chamber via the communication holes of the dome shaped partition and burns flammable gas in the second combustion chamber, wherein when the flammable gas in the first combustion chamber is burned, the burning front in the first combustion chamber reaches each of the communication holes substantially at the same time.