Pneumatic tool using single controller for both forward/reverse switching and speed adjustment

A pneumatic tool using a single controller for both forward/reverse switching and speed adjustment, the pneumatic tool comprising:

• a housing, having an installation tunnel, an air supplying channel communicated with the installation tunnel, a first air inlet, and a second air inlet;
• a control valve, being such installed in the installation tunnel that the control valve is allowed to shift among a first position, a second position and a third position, wherein the control valve has an air incoming channel communicated with the air supplying channel, and an air supplying hole communicated with the air incoming channel, and the air supplying hole has an opening facing the housing;
• the controller, having a main body deposited in the control valve, and two paddles extending outward from two opposite sides of the main body, respectively, wherein the two paddles are exposed outside the housing for a user to operate one said paddle in order to rotate the controller and the control valve;
• a pushing rod, such passing through the controller and the control valve that the pushing rod is allowed to move along an imaginary axis, wherein the pushing rod has an inner end located in the air supplying channel, and an outer end opposite to the inner end;
• and
• a trigger, being deposited at the outer end of the pushing rod,
• wherein, the air supplying hole is communicated with the first air inlet when the control valve is at the first position, and is communicated with the second air inlet when the control valve is at the second position and the third position, and corresponding areas between the opening of the air supplying hole and the second air inlet formed when the control valve is at the second position and at the third position are different.