Patent ID: 8267190

Claim:
A direction switching and speed controlling device for an air tool comprising a casing, an air cylinder, a spring, a metal ball, a valve cap, a switch and an air valve; wherein said casing is provided on an outmost portion; two holes are provided respectively on two lateral sides of the air cylinder; holes on one side are two air outlets and are arranged vertically on the air cylinder; two holes on another side are a forward rotation air inlet and a reverse rotation air inlet, arranged horizontally on the air cylinder; said air valve is attached to a lateral side of the air cylinder, where an air outlet provided on a bottom thereof is connected to one of said air inlets by selection; the air valve having an indentation portion provided on a lateral side thereof, said indentation portion is engaged with teeth portion provided on a lower end of said switch; another end of the switch is an elongated portion extended horizontally with a blind hole set in a center portion thereof; said spring is disposed into the hole with the metal ball attached to an end thereof, thus a partial of the ball is exposed from an opening of the hole; said valve cap is provided on a bottom portion of the casing with a plurality of spherical grooves provided therein for receiving said metal ball.