| US 7,461,766 B2 | ||
| Combustion power tool | ||
| Kenichi Miyata, Anjo (Japan); and Jiro Oda, Anjo (Japan) | ||
| Assigned to Makita Corporation, Anjo-shi (Japan) | ||
| Filed on Nov. 08, 2004, as Appl. No. 10/984,349. | ||
| Claims priority of application No. 2003-377872 (JP), filed on Nov. 07, 2003; and application No. 2003-386436 (JP), filed on Nov. 17, 2003. | ||
| Prior Publication US 2005/0098123 A1, May 12, 2005 | ||
| Int. Cl. B25C 1/08 (2006.01) | ||
| U.S. Cl. 227—10 [227/9; 123/46 SC] | 12 Claims |
| 1. A combustion power tool comprising:
a combustion chamber in which a fuel is burned,
a fuel supplier that supplies the fuel into the combustion chamber, the fuel supplier comprising
a fuel tank, and
an auxiliary chamber coupled to the fuel tank,
an igniter disposed in the combustion chamber,
a driving mechanism actuated to perform a predetermined operation by utilizing a combustion pressure, the combustion pressure
being generated when the fuel is burned in the combustion chamber by the igniter, and
a single actuator means for actuating the fuel supplier and the igniter, wherein
in a first position of the actuator means, the auxiliary chamber receives a predetermined amount of the fuel from the fuel
tank and stores the predetermined amount of the fuel in a pressurized state, and
in a second position of the actuator means, the fuel is supplied from the auxiliary chamber into the combustion chamber and
the igniter is actuated to perform ignition in response to and dependent upon changes in the pressure of the fuel within the
auxiliary chamber as the fuel is supplied into the combustion chamber.
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