Patent ID: 6782957
Filing Date: 2004-08-31
Classification: B23P,B25B

Abstract:
An air impact driver for driving to rotate a driver bit by transmitting a rotational torque of an air motor to the driver bit via a centrifugal mesh clutch mechanism,wherein the centrifugal mesh clutch mechanism, an air cylinder, and a fixed nose constituting a screw guide are arranged in one row on a same axis line, and the driver bit is mounted to a front face of a piston of the air cylinder, and a spline shaft is mounted to a rear face thereof, and a shaft hole slidingly paired with the spline shaft is provided at a center of a driven rotational member intermittently rotated by the centrifugal mesh clutch mechanism and fitted with the spline shaft, and wherein the spline shaft, the piston, and the driver bit advance while being rotated integrally by driving the air motor and the air cylinder to thereby fasten a screw.