Patent ID: 7210431
Filing Date: 2007-05-01
Classification: B25C,F02B,F02F

Abstract:
1. A combustion-type power tool comprising: an outer frame having an inner space; a gas cartridge cylinder receiving portion where a gas cartridge cylinder is placed; a cylinder having inner and outer surfaces and an imaginary longitudinal axis, the cylinder being fixedly disposed within the outer frame; a cylinder head fixed to the outer frame; a piston slidably movable along the inner surface of the cylinder; a combustion chamber frame having inner and outer surfaces, the combustion chamber frame being disposed within the outer frame to surround the cylinder to be movable along the cylinder, a combustion chamber being formed by the cylinder head, the cylinder, the piston, and the combustion chamber frame when the combustion chamber frame is in abutment with the cylinder head, the combustion chamber being capable of accommodating a gaseous mixture of existing air in the combustion chamber and fuel injected therein from the gas cartridge cylinder; a partition wall that divides the inner space of the outer frame into a first space in which the cylinder and the combustion chamber frame are disposed and a second space in which the gas cartridge cylinder is disposed, the partition wall being formed with a through-hole through which the first space and the second space are in fluid communication with each other; and an exhaust gas flow regulating member that regulates an exhaust gas flow generated by combustion of the gaseous mixture in the combustion chamber so that exhaust gas discharged from the combustion chamber is directed away from the through-hole.