Patent ID: 8485408

Claim:
A gas combustion type driving tool comprising: a cylinder in which a piston is accommodated slidably in a vertical direction and a driver is connected in a lower side of the piston; a cylinder head provided above the cylinder; a cylindrical movable sleeve disposed movably in the vertical direction between the cylinder and the cylinder head; a connecting portion for connecting the cylinder and the cylinder head, the connecting portion securing the relative position between the cylinder and the cylinder head such that a relative positional dimension in the vertical direction between the cylinder and the cylinder head is not changed due to a combustion pressure or inertial force throughout a time of driving a fastener from the driving tool, the connecting portion extending between first and second ends, the first end being fastened to the cylinder head by screwing a fixing bolt and the second end being connected to an upper end of the cylinder at a top dead center end of the cylinder such that the connecting portion extends from the upper end of the cylinder; and a body cover encasing the connecting portion.